wip

2026-09-29 09:47:27 +02:00 · 2026-09-29 09:47:27 +02:00 · 5e160ae11c
commit 5e160ae11c
parent 08b69851cd
65 changed files with 3569 additions and 315 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@ -226,6 +226,23 @@ version = "1.0.4"
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@ -310,6 +327,15 @@ dependencies = [
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@ -678,8 +704,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@ -689,8 +717,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@ -1013,6 +1069,12 @@ dependencies = [
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@ -1111,6 +1173,12 @@ version = "0.4.33"
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@ -1189,7 +1257,7 @@ dependencies = [
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@ -1524,7 +1726,7 @@ dependencies = [
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@ -1541,6 +1743,12 @@ dependencies = [
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@ -1927,7 +2170,7 @@ dependencies = [
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@ -1966,7 +2209,7 @@ dependencies = [
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@ -2035,6 +2278,7 @@ dependencies = [
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@ -2080,6 +2324,9 @@ name = "sync_wrapper"
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@ -2287,8 +2544,10 @@ dependencies = [
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 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 [[package]]
 name = "winnow"
 version = "1.0.4"
--- a/Cargo.toml
+++ b/Cargo.toml
@ -16,6 +16,10 @@ axum = { version = "0.8.9", features = ["macros"] }
 chrono = { version = "0.4.45", features = ["serde"] }
 config = "0.15.23"
 schemars = { version = "0.9.0", features = ["chrono04"] }
 reqwest = { version = "0.12.28", default-features = false, features = [
    "json",
    "rustls-tls",
 ] }
 serde = { version = "1.0.228", features = ["derive"] }
 serde_json = "1.0.149"
 sqlx = { version = "0.8.6", features = [
--- a/README.md
+++ b/README.md
@ -54,7 +54,8 @@ key, keep it up to date. Every value can also come from the environment
 │   ├── services/         implementations of the repositories (postgres/sqlx)
 │   └── utils/            configuration
 ├── LaTeX_pdf/            template of the lecture notes pdf (pandoc + pdflatex)
-├── storage/              files of the courses, stands in for the NAS (gitignored)
+├── storage/              files of the courses and associations, one folder each,
 │                         stands in for the NAS (gitignored)
 ├── db/
 │   ├── migrations/       dbmate migrations
 │   ├── schema.sql        dump regenerated by dbmate, do not edit by hand
--- a/config.example.yml
+++ b/config.example.yml
@ -14,7 +14,8 @@ postgres:
 # Directory containing the built frontend (frontend/dist after `npm run build`)
 frontend_dir: frontend/dist
-# Where the files of the courses are stored (lecture notes and their pdf...).
+# Where the files of the courses and associations are stored (lecture notes and their
 # pdf...), one folder each: Cours/CS-477 Advanced OS/Notes/..., Associations/...
 # A local directory standing in for the NAS for now.
 storage_dir: storage
@ -27,3 +28,12 @@ notes:
  # Shown in the header of the pdf, both optional
  student_name: Jane Doe
  student_id: "123456"
 # Optional: the focus sessions of the pomodoro are also counted in TimeTagger, tagged
 # with the course code, the tags and the name of the task. Without it, the time is only
 # counted in the app.
 # timetagger:
 #   # https://timetagger.app/api/v2 by default, or the api of your own server
 #   url: https://timetagger.app/api/v2
 #   # Api token, from the account page of TimeTagger
 #   token: ...
--- a/db/migrations/20260929180000_associations_focus.sql
+++ b/db/migrations/20260929180000_associations_focus.sql
@ -0,0 +1,41 @@
 -- migrate:up
 -- Associations are managed like courses: same tasks, files and slots, without grades.
 ALTER TABLE courses ADD COLUMN kind TEXT NOT NULL DEFAULT 'course'
    CHECK (kind IN ('course', 'association'));
 ALTER TABLE courses ALTER COLUMN kind DROP DEFAULT;
 -- Folder of the course in the storage (the NAS), relative to its root, named after the
 -- course: `Cours/CS-477 Advanced operating systems`. Moved when the course is renamed.
 -- The existing folders were named after the ids and are not moved by this migration.
 ALTER TABLE courses ADD COLUMN folder TEXT;
 UPDATE courses SET folder = 'Cours/' || trim(regexp_replace(
    regexp_replace(COALESCE(code || ' ', '') || "name", '[/\\:*?"<>|]', '-', 'g'),
    '\s+', ' ', 'g'));
 ALTER TABLE courses ALTER COLUMN folder SET NOT NULL;
 ALTER TABLE courses ADD CONSTRAINT courses_folder_key UNIQUE (folder);
 -- Path of a file in the folder of its course, without extension: `Notes/Lecture 1 Notes`
 -- (the note is `Notes/Lecture 1 Notes.md` and its pdf `Notes/Lecture 1 Notes.pdf`)
 ALTER TABLE course_files ADD COLUMN "path" TEXT;
 UPDATE course_files SET "path" = 'Notes/' || trim(regexp_replace(
    regexp_replace("name", '[/\\:*?"<>|]', '-', 'g'), '\s+', ' ', 'g'));
 ALTER TABLE course_files ALTER COLUMN "path" SET NOT NULL;
 ALTER TABLE course_files ADD CONSTRAINT course_files_course_id_path_key UNIQUE (course_id, "path");
 -- Time spent working on a task, counted by the pomodoro
 ALTER TABLE tasks ADD COLUMN time_spent INTEGER NOT NULL DEFAULT 0 CHECK (time_spent >= 0);
 -- Kinds of the slots and tasks of the associations
 INSERT INTO tags ("name", color, scopes, slug) VALUES
    ('{"fr": "Réunion", "en": "Meeting"}', '#db2777', '{slot,task}', 'meeting'),
    ('{"fr": "Événement", "en": "Event"}', '#4f46e5', '{slot,task}', 'event');
 -- migrate:down
 DELETE FROM courses WHERE kind = 'association';
 DELETE FROM time_slots WHERE tag_id IN (SELECT id FROM tags WHERE slug IN ('meeting', 'event'));
 DELETE FROM tags WHERE slug IN ('meeting', 'event');
 ALTER TABLE tasks DROP COLUMN time_spent;
 ALTER TABLE course_files DROP COLUMN "path";
 ALTER TABLE courses DROP COLUMN folder;
 ALTER TABLE courses DROP COLUMN kind;
--- a/db/schema.sql
+++ b/db/schema.sql
@ -31,6 +31,7 @@ CREATE TABLE public.course_files (
    created_at timestamp with time zone DEFAULT now() CONSTRAINT lecture_notes_created_at_not_null NOT NULL,
    updated_at timestamp with time zone DEFAULT now() CONSTRAINT lecture_notes_updated_at_not_null NOT NULL,
    kind text NOT NULL,
    path text NOT NULL,
    CONSTRAINT course_files_kind_check CHECK ((kind = ANY (ARRAY['note'::text, 'upload'::text])))
 );
@ -64,7 +65,10 @@ CREATE TABLE public.courses (
    name text NOT NULL,
    code text,
    teachers text[] DEFAULT '{}'::text[] NOT NULL,
-    main_page_url text
+    main_page_url text,
    kind text NOT NULL,
    folder text NOT NULL,
    CONSTRAINT courses_kind_check CHECK ((kind = ANY (ARRAY['course'::text, 'association'::text])))
 );
@ -201,7 +205,9 @@ CREATE TABLE public.tasks (
    description text,
    links text[] DEFAULT '{}'::text[] NOT NULL,
    deadline timestamp with time zone,
-    done boolean DEFAULT false NOT NULL
+    done boolean DEFAULT false NOT NULL,
    time_spent integer DEFAULT 0 NOT NULL,
    CONSTRAINT tasks_time_spent_check CHECK ((time_spent >= 0))
 );
@ -303,6 +309,14 @@ ALTER TABLE ONLY public.tasks ALTER COLUMN id SET DEFAULT nextval('public.tasks_
 ALTER TABLE ONLY public.time_slots ALTER COLUMN id SET DEFAULT nextval('public.time_slots_id_seq'::regclass);
 --
 -- Name: course_files course_files_course_id_path_key; Type: CONSTRAINT; Schema: public; Owner: -
 --
 ALTER TABLE ONLY public.course_files
    ADD CONSTRAINT course_files_course_id_path_key UNIQUE (course_id, path);
 --
 -- Name: course_files course_files_pkey; Type: CONSTRAINT; Schema: public; Owner: -
 --
@ -311,6 +325,14 @@ ALTER TABLE ONLY public.course_files
    ADD CONSTRAINT course_files_pkey PRIMARY KEY (id);
 --
 -- Name: courses courses_folder_key; Type: CONSTRAINT; Schema: public; Owner: -
 --
 ALTER TABLE ONLY public.courses
    ADD CONSTRAINT courses_folder_key UNIQUE (folder);
 --
 -- Name: courses courses_pkey; Type: CONSTRAINT; Schema: public; Owner: -
 --
@ -505,4 +527,5 @@ ALTER TABLE ONLY public.time_slots
 INSERT INTO public.schema_migrations (version) VALUES
    ('20260928120000'),
    ('20260928150000'),
-    ('20260929090000');
+    ('20260929090000'),
    ('20260929180000');
--- a/frontend/src/components/AppContent.vue
+++ b/frontend/src/components/AppContent.vue
@ -12,11 +12,14 @@ import {
 import { Separator } from '@/components/ui/separator'
 import { SidebarInset, SidebarTrigger } from '@/components/ui/sidebar'
 import ThemeToggle from '@/components/ThemeToggle.vue'
 import { formatDuration, useFocus } from '@/services/focus'
 import { locales, setLocale } from '@/services/i18n'
 import { useI18n } from 'vue-i18n'
 import { Pause, Timer } from '@lucide/vue'
 const route = useRoute()
 const { locale: currentLocale } = useI18n()
 const { session, elapsed, isRunning } = useFocus()
 const selectedLocale = computed(
  () => locales.find((l) => l.lang === currentLocale.value) ?? locales[0],
@ -30,7 +33,21 @@ const selectedLocale = computed(
      <Separator orientation="vertical" class="mr-2 data-[orientation=vertical]:h-4" />
      <h1 class="font-medium">{{ route.meta.title ? $t(route.meta.title) : '' }}</h1>
-      <ThemeToggle class="ml-auto" />
+      <!-- The session running, from any other page -->
      <RouterLink
        v-if="session && route.name !== 'pomodoro'"
        :to="{ name: 'pomodoro' }"
        class="ml-auto flex max-w-56 items-center gap-2 rounded-full border px-3 py-1 text-sm transition-colors hover:bg-accent"
        :title="$t('focus.back')"
      >
        <Timer v-if="isRunning" class="size-4 shrink-0 animate-pulse text-primary" />
        <Pause v-else class="size-4 shrink-0 text-muted-foreground" />
        <span class="font-mono tabular-nums">{{ formatDuration(elapsed) }}</span>
        <span class="hidden truncate text-muted-foreground sm:inline">
          {{ session.task?.name ?? $t('focus.free') }}
        </span>
      </RouterLink>
      <ThemeToggle :class="{ 'ml-auto': !session || route.name === 'pomodoro' }" />
      <DropdownMenu>
        <DropdownMenuTrigger as-child>
          <Button variant="outline" class="rounded-lg">
--- a/frontend/src/components/calendar/CoursesCalendar.vue
+++ b/frontend/src/components/calendar/CoursesCalendar.vue
@ -1,11 +1,12 @@
 <script setup lang="ts">
 /**
- * Month calendar of the deadlines of every course. On a phone the days only show dots:
+ * Month calendar of the deadlines of the courses and associations of `kinds`. On a phone
- * the tasks of the selected day are listed under the calendar, on every screen.
+ * the days only show dots: the tasks of the selected day are listed under the calendar,
 * on every screen. `create` asks for a new task due on the selected day.
 */
 import { computed, ref } from 'vue'
 import { useI18n } from 'vue-i18n'
-import { CalendarCheck, ChevronLeft, ChevronRight } from '@lucide/vue'
+import { CalendarCheck, ChevronLeft, ChevronRight, Plus, Timer } from '@lucide/vue'
 import TagBadge from '@/components/course/TagBadge.vue'
 import { Button } from '@/components/ui/button'
@ -14,7 +15,11 @@ import { useTags } from '@/services/api/tags'
 import { useCalendarTasks } from '@/services/api/tasks'
 import { dayKey, monthWeeks, weeksPeriod } from '@/utils/calendar'
 import { isPast } from '@/utils/dates'
-import type { CalendarTask } from '@/utils/types'
+import { coursePageRoute, focusRoute, tasksTab } from '@/utils/routes'
 import type { CalendarTask, CourseKind } from '@/utils/types'
 const props = defineProps<{ kinds: CourseKind[] }>()
 const emit = defineEmits<{ create: [day: Date] }>()
 const { locale } = useI18n()
 const { tagsById } = useTags()
@ -38,6 +43,7 @@ const {
 const tasksByDay = computed(() => {
  const byDay = new Map<string, CalendarTask[]>()
  for (const task of tasks.value ?? []) {
    if (!props.kinds.includes(task.course_kind)) continue
    const key = dayKey(new Date(task.deadline))
    byDay.set(key, [...(byDay.get(key) ?? []), task])
  }
@ -54,12 +60,13 @@ const weekdayLabels = computed(() =>
    new Intl.DateTimeFormat(locale.value, { weekday: 'short' }).format(day),
  ),
 )
-const selectedLabel = computed(() => {
+const selectedDate = computed(() => {
  const [year, m, d] = selectedDay.value.split('-').map(Number)
-  return new Intl.DateTimeFormat(locale.value, { dateStyle: 'full' }).format(
+  return new Date(year!, m! - 1, d)
    new Date(year!, m! - 1, d),
  )
 })
 const selectedLabel = computed(() =>
  new Intl.DateTimeFormat(locale.value, { dateStyle: 'full' }).format(selectedDate.value),
 )
 function moveMonth(offset: number) {
  const next = new Date(month.value.getFullYear(), month.value.getMonth() + offset, 1)
@ -91,7 +98,7 @@ function time(task: CalendarTask) {
 }
 function taskLink(task: CalendarTask) {
-  return { name: 'course', params: { id: task.course_id }, query: { tab: 'tasks' } }
+  return coursePageRoute({ id: task.course_id, kind: task.course_kind }, tasksTab(task.course_kind))
 }
 </script>
@ -208,8 +215,12 @@ function taskLink(task: CalendarTask) {
    </p>
    <Card>
-      <CardHeader>
+      <CardHeader class="flex flex-row items-center justify-between gap-2">
        <CardTitle class="text-base first-letter:uppercase">{{ selectedLabel }}</CardTitle>
        <Button variant="outline" size="sm" @click="emit('create', selectedDate)">
          <Plus />
          {{ $t('calendar.add-that-day') }}
        </Button>
      </CardHeader>
      <CardContent>
        <div
@ -220,10 +231,10 @@ function taskLink(task: CalendarTask) {
          {{ $t('calendar.nothing') }}
        </div>
        <ul v-else class="flex flex-col gap-3">
-          <li v-for="task in selectedTasks" :key="task.task_id">
+          <li v-for="task in selectedTasks" :key="task.task_id" class="flex items-start gap-2">
            <RouterLink
              :to="taskLink(task)"
-              class="flex flex-col gap-1 border-l-2 pl-3 hover:underline"
+              class="flex min-w-0 flex-1 flex-col gap-1 border-l-2 pl-3 hover:underline"
              :style="{ borderLeftColor: taskColor(task) }"
            >
              <span
@ -245,6 +256,19 @@ function taskLink(task: CalendarTask) {
                </template>
              </span>
            </RouterLink>
            <Button
              v-if="!task.done"
              variant="ghost"
              size="icon-sm"
              class="shrink-0"
              :title="$t('focus.start')"
              as-child
            >
              <RouterLink :to="focusRoute(task.task_id)">
                <Timer />
                <span class="sr-only">{{ $t('focus.start') }}</span>
              </RouterLink>
            </Button>
          </li>
        </ul>
      </CardContent>
--- a/frontend/src/components/calendar/TodoList.vue
+++ b/frontend/src/components/calendar/TodoList.vue
@ -0,0 +1,185 @@
 <script setup lang="ts">
 /**
 * Everything left to do in the courses and associations of `kinds`: the late tasks,
 * today's, this week's, the later ones and the ones without deadline. Each task (and
 * subtask) can be checked, or worked on with the pomodoro.
 */
 import { computed } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { toast } from 'vue-sonner'
 import { ListTodo, Timer } from '@lucide/vue'
 import TagBadge from '@/components/course/TagBadge.vue'
 import { Button } from '@/components/ui/button'
 import { Checkbox } from '@/components/ui/checkbox'
 import { Skeleton } from '@/components/ui/skeleton'
 import { useTags } from '@/services/api/tags'
 import { toTaskBody, useAnyTaskMutations, useTodoTasks } from '@/services/api/tasks'
 import { useFocus } from '@/services/focus'
 import { dayKey } from '@/utils/calendar'
 import { formatDateTime, formatRelative, isPast } from '@/utils/dates'
 import { coursePageRoute, focusRoute, tasksTab } from '@/utils/routes'
 import type { CourseKind, Task, TodoTask } from '@/utils/types'
 const props = defineProps<{ kinds: CourseKind[] }>()
 const { t, locale } = useI18n()
 const { tagsById } = useTags()
 const { data, isPending, isError, refetch } = useTodoTasks()
 const { update } = useAnyTaskMutations()
 const { session } = useFocus()
 const GROUPS = ['late', 'today', 'week', 'later', 'undated'] as const
 type Group = (typeof GROUPS)[number]
 function groupOf(task: Task): Group {
  if (!task.deadline) return 'undated'
  if (isPast(task.deadline)) return 'late'
  const deadline = new Date(task.deadline)
  if (dayKey(deadline) === dayKey(new Date())) return 'today'
  return deadline.getTime() - Date.now() < 7 * 24 * 3600 * 1000 ? 'week' : 'later'
 }
 /** Already sorted by deadline by the backend */
 const groups = computed(() => {
  const byGroup = new Map<Group, TodoTask[]>()
  for (const todo of data.value ?? []) {
    if (!props.kinds.includes(todo.course.kind)) continue
    const group = groupOf(todo.task)
    byGroup.set(group, [...(byGroup.get(group) ?? []), todo])
  }
  return GROUPS.filter((group) => byGroup.has(group)).map((group) => ({
    group,
    todos: byGroup.get(group)!,
  }))
 })
 async function setDone(courseId: number, task: Task, done: boolean) {
  try {
    await update.mutateAsync({ courseId, id: task.id, body: toTaskBody(task, { done }) })
  } catch {
    toast.error(t('tasks.save-error'))
  }
 }
 function inFocus(task: Task) {
  return session.value?.task?.task_id === task.id
 }
 </script>
 <template>
  <div class="flex flex-col gap-4">
    <div v-if="isPending" class="flex flex-col gap-2">
      <Skeleton v-for="i in 4" :key="i" class="h-14 rounded-lg" />
    </div>
    <p v-else-if="isError" class="text-sm text-destructive">
      {{ $t('tasks.load-error') }}
      <Button variant="link" size="sm" @click="refetch()">{{ $t('common.retry') }}</Button>
    </p>
    <div
      v-else-if="!groups.length"
      class="flex flex-col items-center gap-2 py-6 text-center text-sm text-muted-foreground"
    >
      <ListTodo class="size-6" />
      {{ $t('calendar.todo.empty') }}
    </div>
    <section v-for="{ group, todos } in groups" v-else :key="group" class="flex flex-col gap-2">
      <h3
        class="text-xs font-semibold tracking-wide uppercase"
        :class="group === 'late' ? 'text-destructive' : 'text-muted-foreground'"
      >
        {{ $t(`calendar.todo.${group}`) }}
        <span class="font-normal">· {{ todos.length }}</span>
      </h3>
      <ul class="flex flex-col gap-2">
        <li
          v-for="{ course, task } in todos"
          :key="task.id"
          class="flex flex-col gap-1.5 rounded-lg border bg-card p-2.5"
        >
          <div class="flex items-start gap-2.5">
            <Checkbox
              class="mt-0.5"
              :model-value="task.done"
              :aria-label="$t('tasks.done')"
              @update:model-value="setDone(course.id, task, $event === true)"
            />
            <div class="flex min-w-0 flex-1 flex-col gap-1">
              <RouterLink
                :to="coursePageRoute(course, tasksTab(course.kind))"
                class="text-sm leading-snug font-medium hover:underline"
              >
                {{ task.name }}
              </RouterLink>
              <span class="flex flex-wrap items-center gap-1.5 text-xs text-muted-foreground">
                <span class="font-mono">{{ course.code ?? course.name }}</span>
                <template v-if="task.deadline">
                  ·
                  <span
                    :class="{ 'font-medium text-destructive': group === 'late' }"
                    :title="formatDateTime(task.deadline, locale)"
                  >
                    {{ formatRelative(task.deadline, locale) }}
                  </span>
                </template>
                <template v-for="tagId in task.tag_ids" :key="tagId">
                  <TagBadge v-if="tagsById.get(tagId)" :tag="tagsById.get(tagId)!" />
                </template>
              </span>
            </div>
            <Button
              variant="ghost"
              size="icon-sm"
              class="shrink-0"
              :class="{ 'text-primary': inFocus(task) }"
              :title="$t('focus.start')"
              as-child
            >
              <RouterLink :to="focusRoute(task.id)">
                <Timer :class="{ 'animate-pulse': inFocus(task) }" />
                <span class="sr-only">{{ $t('focus.start') }}</span>
              </RouterLink>
            </Button>
          </div>
          <ul v-if="task.subtasks.length" class="ml-6.5 flex flex-col gap-0.5 border-l pl-2.5">
            <li
              v-for="subtask in task.subtasks"
              :key="subtask.id"
              class="group flex items-center gap-2 text-sm"
            >
              <Checkbox
                :model-value="subtask.done"
                :aria-label="$t('tasks.done')"
                @update:model-value="setDone(course.id, subtask, $event === true)"
              />
              <span
                class="min-w-0 flex-1 truncate"
                :class="{ 'text-muted-foreground line-through': subtask.done }"
              >
                {{ subtask.name }}
              </span>
              <Button
                v-if="!subtask.done"
                variant="ghost"
                size="icon-sm"
                class="size-7 shrink-0 opacity-0 transition-opacity group-focus-within:opacity-100 group-hover:opacity-100 [@media(hover:none)]:opacity-100"
                :class="{ 'text-primary opacity-100': inFocus(subtask) }"
                :title="$t('focus.start')"
                as-child
              >
                <RouterLink :to="focusRoute(subtask.id)">
                  <Timer :class="{ 'animate-pulse': inFocus(subtask) }" />
                  <span class="sr-only">{{ $t('focus.start') }}</span>
                </RouterLink>
              </Button>
            </li>
          </ul>
        </li>
      </ul>
    </section>
  </div>
 </template>
--- a/frontend/src/components/course/AssociationDeadlinesTab.vue
+++ b/frontend/src/components/course/AssociationDeadlinesTab.vue
@ -0,0 +1,190 @@
 <script setup lang="ts">
 /**
 * Deadlines of an association: its week, with its slots (added by selecting a time range)
 * and the deadlines of each day, then the list of its tasks.
 */
 import { computed, ref } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { toast } from 'vue-sonner'
 import { ChevronLeft, ChevronRight } from '@lucide/vue'
 import ConfirmDeleteDialog from '@/components/ConfirmDeleteDialog.vue'
 import CourseTasksTab from '@/components/course/CourseTasksTab.vue'
 import SlotFormDialog from '@/components/schedule/SlotFormDialog.vue'
 import WeekTimetable from '@/components/timetable/WeekTimetable.vue'
 import { Button } from '@/components/ui/button'
 import { useDeleteSlot } from '@/services/api/courses'
 import { useTags } from '@/services/api/tags'
 import { useCalendarTasks } from '@/services/api/tasks'
 import { dayKey, startOfWeek, weeksPeriod } from '@/utils/calendar'
 import { isPast } from '@/utils/dates'
 import { toHourMinutes, type SlotSelection } from '@/utils/timetable'
 import type { CalendarTask, Course, TimeSlot } from '@/utils/types'
 const props = defineProps<{ course: Course }>()
 const { t, locale } = useI18n()
 const { tagsById } = useTags()
 const deleteSlot = useDeleteSlot()
 const courses = computed(() => [props.course])
 /** Monday of the week shown */
 const monday = ref(startOfWeek(new Date()))
 /** The 7 days of the week, the timetable shows the first 5 */
 const week = computed(() =>
  Array.from({ length: 7 }, (_, i) => {
    const day = new Date(monday.value)
    day.setDate(day.getDate() + i)
    return day
  }),
 )
 function moveWeek(offset: number) {
  const next = new Date(monday.value)
  next.setDate(next.getDate() + offset * 7)
  monday.value = next
 }
 const weekLabel = computed(() => {
  const format = new Intl.DateTimeFormat(locale.value, { day: 'numeric', month: 'long' })
  return `${format.format(week.value[0]!)} – ${format.format(week.value[6]!)}`
 })
 const { data: tasks } = useCalendarTasks(() => weeksPeriod([week.value]))
 const tasksByDay = computed(() => {
  const byDay = new Map<string, CalendarTask[]>()
  for (const task of tasks.value ?? []) {
    if (task.course_id !== props.course.id) continue
    const key = dayKey(new Date(task.deadline))
    byDay.set(key, [...(byDay.get(key) ?? []), task])
  }
  return byDay
 })
 /** Deadlines of the weekend, not shown by the timetable */
 const weekendTasks = computed(() =>
  week.value.slice(5).flatMap((day) => tasksByDay.value.get(dayKey(day)) ?? []),
 )
 function taskColor(task: CalendarTask) {
  return tagsById.value.get(task.tag_ids[0] ?? -1)?.color ?? 'var(--primary)'
 }
 function time(task: CalendarTask) {
  return new Intl.DateTimeFormat(locale.value, { hour: '2-digit', minute: '2-digit' }).format(
    new Date(task.deadline),
  )
 }
 const slotFormOpen = ref(false)
 const slotSelection = ref<SlotSelection>()
 function onSelect(selection: SlotSelection) {
  slotSelection.value = selection
  slotFormOpen.value = true
 }
 const deleteOpen = ref(false)
 const deletedSlot = ref<TimeSlot>()
 const deletedSlotLabel = computed(() => {
  const slot = deletedSlot.value
  if (!slot) return ''
  return `${t(`weekdays.${slot.weekday}`)} ${toHourMinutes(slot.start_time)}–${toHourMinutes(slot.end_time)}`
 })
 function askDeleteSlot(slot: TimeSlot) {
  deletedSlot.value = slot
  deleteOpen.value = true
 }
 async function confirmDeleteSlot() {
  if (!deletedSlot.value) return
  try {
    await deleteSlot.mutateAsync({ courseId: props.course.id, slotId: deletedSlot.value.id })
    toast.success(t('schedule.slot-deleted'))
  } catch {
    toast.error(t('schedule.slot-delete-error'))
  }
 }
 </script>
 <template>
  <div class="flex min-w-0 flex-col gap-6">
    <section class="flex min-w-0 flex-col gap-2">
      <div class="flex flex-wrap items-center gap-2">
        <h3 class="mr-auto font-medium first-letter:uppercase">{{ weekLabel }}</h3>
        <Button variant="outline" size="sm" @click="monday = startOfWeek(new Date())">
          {{ $t('calendar.this-week') }}
        </Button>
        <Button
          variant="outline"
          size="icon-sm"
          :title="$t('calendar.previous-week')"
          @click="moveWeek(-1)"
        >
          <ChevronLeft />
          <span class="sr-only">{{ $t('calendar.previous-week') }}</span>
        </Button>
        <Button
          variant="outline"
          size="icon-sm"
          :title="$t('calendar.next-week')"
          @click="moveWeek(1)"
        >
          <ChevronRight />
          <span class="sr-only">{{ $t('calendar.next-week') }}</span>
        </Button>
      </div>
      <p class="text-sm text-muted-foreground">{{ $t('association.deadlines.hint') }}</p>
      <WeekTimetable
        :courses="courses"
        :dates="week.slice(0, 5)"
        height="34rem"
        selectable
        deletable
        @select="onSelect"
        @delete="askDeleteSlot"
      >
        <template #day="{ date }">
          <span v-if="date" class="flex min-w-0 flex-col gap-0.5 text-left font-normal">
            <span
              v-for="task in tasksByDay.get(dayKey(date)) ?? []"
              :key="task.task_id"
              class="truncate rounded border-l-2 px-1 py-0.5 text-xs"
              :class="{
                'text-muted-foreground line-through': task.done,
                'font-medium text-destructive': !task.done && isPast(task.deadline),
              }"
              :style="{
                borderLeftColor: taskColor(task),
                backgroundColor: `color-mix(in oklab, ${taskColor(task)} 12%, transparent)`,
              }"
              :title="`${time(task)} · ${task.name}`"
            >
              <span class="tabular-nums opacity-70">{{ time(task) }}</span>
              {{ task.name }}
            </span>
          </span>
        </template>
      </WeekTimetable>
      <p v-if="weekendTasks.length" class="text-sm text-muted-foreground">
        {{ $t('association.deadlines.weekend') }}
        <span v-for="task in weekendTasks" :key="task.task_id" class="ml-2 text-foreground">
          {{ task.name }}
        </span>
      </p>
    </section>
    <CourseTasksTab :course-id="course.id" />
    <SlotFormDialog v-model:open="slotFormOpen" :selection="slotSelection" :course-id="course.id" />
    <ConfirmDeleteDialog
      v-model:open="deleteOpen"
      :title="$t('schedule.delete-slot-title', { slot: deletedSlotLabel })"
      @confirm="confirmDeleteSlot"
    />
  </div>
 </template>
--- a/frontend/src/components/course/CourseFilesTab.vue
+++ b/frontend/src/components/course/CourseFilesTab.vue
@ -18,14 +18,15 @@ import { Tooltip, TooltipContent, TooltipTrigger } from '@/components/ui/tooltip
 import { useCourseFiles, useLectureNoteMutations } from '@/services/api/course-files'
 import { useTags } from '@/services/api/tags'
 import { formatDate } from '@/utils/dates'
-import type { CourseFile } from '@/utils/types'
+import { noteRoute } from '@/utils/routes'
 import type { Course, CourseFile } from '@/utils/types'
-const props = defineProps<{ courseId: number }>()
+const props = defineProps<{ course: Course }>()
 const { t, locale } = useI18n()
 const { tagsById } = useTags()
-const { data: files, isPending, isError, refetch } = useCourseFiles(() => props.courseId)
+const { data: files, isPending, isError, refetch } = useCourseFiles(() => props.course.id)
-const { remove } = useLectureNoteMutations(() => props.courseId)
+const { remove } = useLectureNoteMutations(() => props.course.id)
 const deleteOpen = ref(false)
 const deletedFile = ref<CourseFile>()
@ -50,7 +51,7 @@ async function confirmDelete() {
  <Card>
    <CardHeader class="flex flex-row flex-wrap items-start justify-between gap-3">
      <div class="flex flex-col gap-1.5">
-        <CardTitle class="text-base">{{ $t('files.title') }}</CardTitle>
+        <CardTitle class="text-base">{{ $t(`files.title.${course.kind}`) }}</CardTitle>
        <CardDescription>{{ $t('files.description') }}</CardDescription>
      </div>
      <div class="flex gap-2">
@ -67,7 +68,7 @@ async function confirmDelete() {
          <TooltipContent>{{ $t('files.coming-soon') }}</TooltipContent>
        </Tooltip>
        <Button size="sm" as-child>
-          <RouterLink :to="{ name: 'course-note', params: { id: courseId, noteId: 'new' } }">
+          <RouterLink :to="noteRoute(course, 'new')">
            <Plus />
            {{ $t('notes.new') }}
          </RouterLink>
@ -105,7 +106,7 @@ async function confirmDelete() {
          />
          <div class="flex min-w-0 flex-1 flex-col gap-1">
            <RouterLink
-              :to="{ name: 'course-note', params: { id: courseId, noteId: file.id } }"
+              :to="noteRoute(course, file.id)"
              class="truncate text-sm font-medium after:absolute after:inset-0 after:content-['']"
            >
              {{ file.name }}
@ -134,13 +135,7 @@ async function confirmDelete() {
              :title="$t('common.edit')"
              as-child
            >
-              <RouterLink
+              <RouterLink :to="noteRoute(course, file.id, true)">
                :to="{
                  name: 'course-note',
                  params: { id: courseId, noteId: file.id },
                  query: { edit: '1' },
                }"
              >
                <Pencil />
                <span class="sr-only">{{ $t('common.edit') }}</span>
              </RouterLink>
--- a/frontend/src/components/course/CourseTasksTab.vue
+++ b/frontend/src/components/course/CourseTasksTab.vue
@ -1,12 +1,22 @@
 <script setup lang="ts">
 /**
 * Homework, exams and anything to do for the course, with their subtasks. The backend
- * sorts them (not done first, then by deadline) and nests the subtasks.
+ * sorts them (not done first, then by deadline) and nests the subtasks. Each one can be
 * worked on with the pomodoro.
 */
 import { ref } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { toast } from 'vue-sonner'
-import { CalendarClock, ClipboardList, ExternalLink, Pencil, Plus, Trash2 } from '@lucide/vue'
+import {
  CalendarClock,
  ClipboardList,
  ExternalLink,
  Hourglass,
  Pencil,
  Plus,
  Timer,
  Trash2,
 } from '@lucide/vue'
 import ConfirmDeleteDialog from '@/components/ConfirmDeleteDialog.vue'
 import TagBadge from '@/components/course/TagBadge.vue'
@ -18,7 +28,9 @@ import { Input } from '@/components/ui/input'
 import { Skeleton } from '@/components/ui/skeleton'
 import { useTags } from '@/services/api/tags'
 import { toTaskBody, useCourseTasks, useTaskMutations } from '@/services/api/tasks'
 import { formatSpent, useFocus } from '@/services/focus'
 import { formatDateTime, isPast } from '@/utils/dates'
 import { focusRoute } from '@/utils/routes'
 import type { Task } from '@/utils/types'
 const props = defineProps<{ courseId: number }>()
@ -27,6 +39,11 @@ const { t, locale } = useI18n()
 const { tagsById } = useTags()
 const { data, isPending, isError, refetch } = useCourseTasks(() => props.courseId)
 const { create, update, remove } = useTaskMutations(() => props.courseId)
 const { session } = useFocus()
 function inFocus(task: Task) {
  return session.value?.task?.task_id === task.id
 }
 const formOpen = ref(false)
 const editedTask = ref<Task>()
@ -141,6 +158,13 @@ function isLate(task: Task) {
              {{ formatDateTime(task.deadline, locale) }}
              <template v-if="isLate(task)">· {{ $t('tasks.late') }}</template>
            </span>
            <span
              v-if="task.time_spent >= 60"
              class="flex items-center gap-1 text-xs text-muted-foreground"
            >
              <Hourglass class="size-3.5" />
              {{ $t('tasks.time-spent', { time: formatSpent(task.time_spent) }) }}
            </span>
            <p v-if="task.description" class="text-sm whitespace-pre-line text-muted-foreground">
              {{ task.description }}
            </p>
@ -159,6 +183,19 @@ function isLate(task: Task) {
            </ul>
          </div>
          <div class="flex shrink-0 gap-1">
            <Button
              v-if="!task.done"
              variant="ghost"
              size="icon-sm"
              :class="{ 'text-primary': inFocus(task) }"
              :title="$t('focus.start')"
              as-child
            >
              <RouterLink :to="focusRoute(task.id)">
                <Timer :class="{ 'animate-pulse': inFocus(task) }" />
                <span class="sr-only">{{ $t('focus.start') }}</span>
              </RouterLink>
            </Button>
            <Button
              variant="ghost"
              size="icon-sm"
@ -207,8 +244,23 @@ function isLate(task: Task) {
              <TagBadge v-if="tagsById.get(tagId)" :tag="tagsById.get(tagId)!" />
            </template>
            <div
-              class="ml-auto flex gap-1 opacity-0 transition-opacity group-focus-within:opacity-100 group-hover:opacity-100"
+              class="ml-auto flex gap-1 opacity-0 transition-opacity group-focus-within:opacity-100 group-hover:opacity-100 [@media(hover:none)]:opacity-100"
              :class="{ 'opacity-100': inFocus(subtask) }"
            >
              <Button
                v-if="!subtask.done && !task.done"
                variant="ghost"
                size="icon-sm"
                class="size-7"
                :class="{ 'text-primary': inFocus(subtask) }"
                :title="$t('focus.start')"
                as-child
              >
                <RouterLink :to="focusRoute(subtask.id)">
                  <Timer :class="{ 'animate-pulse': inFocus(subtask) }" />
                  <span class="sr-only">{{ $t('focus.start') }}</span>
                </RouterLink>
              </Button>
              <Button
                variant="ghost"
                size="icon-sm"
--- a/frontend/src/components/course/TaskFormDialog.vue
+++ b/frontend/src/components/course/TaskFormDialog.vue
@ -1,7 +1,8 @@
 <script setup lang="ts">
 /**
 * Creates a task (or a subtask of `parentId`), or edits `task` when given. A task needs
- * at least one tag, a subtask may have none.
+ * at least one tag, a subtask may have none. Without `courseId` the course (or the
 * association) is picked in the form. `defaultDeadline` (ISO) prefills a new task.
 */
 import { computed, ref, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
@ -18,6 +19,15 @@ import {
 } from '@/components/ui/dialog'
 import { Input } from '@/components/ui/input'
 import { Label } from '@/components/ui/label'
 import {
  Select,
  SelectContent,
  SelectGroup,
  SelectItem,
  SelectLabel,
  SelectTrigger,
  SelectValue,
 } from '@/components/ui/select'
 import {
  TagsInput,
  TagsInputInput,
@ -26,17 +36,33 @@ import {
  TagsInputItemText,
 } from '@/components/ui/tags-input'
 import { Textarea } from '@/components/ui/textarea'
 import { useCourses } from '@/services/api/courses'
 import { useTags } from '@/services/api/tags'
-import { useTaskMutations } from '@/services/api/tasks'
+import { useAnyTaskMutations } from '@/services/api/tasks'
 import { fromDateTimeInput, toDateTimeInput } from '@/utils/dates'
 import type { Task, TaskBody } from '@/utils/types'
-const props = defineProps<{ courseId: number; task?: Task; parentId?: number }>()
+const props = defineProps<{
  courseId?: number
  task?: Task
  parentId?: number
  defaultDeadline?: string
 }>()
 const open = defineModel<boolean>('open', { required: true })
 const { t } = useI18n()
 const { data: tags } = useTags('task')
-const { create, update } = useTaskMutations(() => props.courseId)
+const { data: courses } = useCourses()
 const { create, update } = useAnyTaskMutations()
 /** Picked in the form when not given */
 const pickedCourseId = ref<number>()
 const courseId = computed(() => props.task?.course_id ?? props.courseId ?? pickedCourseId.value)
 const courseGroups = computed(() =>
  (['course', 'association'] as const)
    .map((kind) => ({ kind, courses: courses.value?.filter((c) => c.kind === kind) ?? [] }))
    .filter((group) => group.courses.length),
 )
 const isSubtask = computed(() => (props.task ? props.task.parent_id != null : !!props.parentId))
@ -53,7 +79,8 @@ watch(
    if (!isOpen) return
    name.value = props.task?.name ?? ''
    tagIds.value = [...(props.task?.tag_ids ?? [])]
-    deadline.value = props.task?.deadline ? toDateTimeInput(props.task.deadline) : ''
+    const initialDeadline = props.task ? props.task.deadline : props.defaultDeadline
    deadline.value = initialDeadline ? toDateTimeInput(initialDeadline) : ''
    description.value = props.task?.description ?? ''
    links.value = [...(props.task?.links ?? [])]
    submitted.value = false
@ -69,6 +96,7 @@ function toggleTag(id: number) {
 // Same rules as the backend, checked here to point at the faulty field
 const errors = computed(() => ({
  course: courseId.value === undefined,
  name: !name.value.trim(),
  tags: !isSubtask.value && tagIds.value.length === 0,
  links: links.value.some((link) => !/^https?:\/\//.test(link.trim())),
@ -78,7 +106,7 @@ const isPending = computed(() => create.isPending.value || update.isPending.valu
 async function submit() {
  submitted.value = true
-  if (Object.values(errors.value).some(Boolean)) return
+  if (Object.values(errors.value).some(Boolean) || courseId.value === undefined) return
  const body: TaskBody = {
    name: name.value.trim(),
@ -90,10 +118,13 @@ async function submit() {
  }
  try {
    if (props.task) {
-      await update.mutateAsync({ id: props.task.id, body })
+      await update.mutateAsync({ courseId: courseId.value, id: props.task.id, body })
      toast.success(t('tasks.updated'))
    } else {
-      await create.mutateAsync({ ...body, parent_id: props.parentId ?? null })
+      await create.mutateAsync({
        courseId: courseId.value,
        body: { ...body, parent_id: props.parentId ?? null },
      })
      toast.success(t('tasks.created'))
    }
    open.value = false
@ -116,6 +147,30 @@ async function submit() {
      </DialogHeader>
      <form id="task-form" class="flex flex-col gap-4" novalidate @submit.prevent="submit">
        <div v-if="!task && props.courseId === undefined" class="flex flex-col gap-2">
          <Label for="task-course">{{ $t('tasks.form.course') }}</Label>
          <Select v-model="pickedCourseId">
            <SelectTrigger
              id="task-course"
              class="w-full"
              :aria-invalid="submitted && errors.course"
            >
              <SelectValue :placeholder="$t('tasks.form.course-placeholder')" />
            </SelectTrigger>
            <SelectContent>
              <SelectGroup v-for="group in courseGroups" :key="group.kind">
                <SelectLabel>{{ $t(`nav.${group.kind}s`) }}</SelectLabel>
                <SelectItem v-for="course in group.courses" :key="course.id" :value="course.id">
                  {{ course.name }}
                  <span v-if="course.code" class="font-mono text-xs text-muted-foreground">
                    {{ course.code }}
                  </span>
                </SelectItem>
              </SelectGroup>
            </SelectContent>
          </Select>
        </div>
        <div class="flex flex-col gap-2">
          <Label for="task-name">{{ $t('tasks.form.name') }}</Label>
          <Input
--- a/frontend/src/components/courses/CourseFormDialog.vue
+++ b/frontend/src/components/courses/CourseFormDialog.vue
@ -1,7 +1,7 @@
 <script setup lang="ts">
 /**
- * Creates a course, or edits `course` when given. Slots are not edited here but by
+ * Creates a course or an association, or edits `course` when given. Slots are not edited
- * selecting a time range in the schedule.
+ * here but by selecting a time range in the schedule. An association has no teacher.
 */
 import { computed, ref, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
@ -26,12 +26,16 @@ import {
  TagsInputItemText,
 } from '@/components/ui/tags-input'
 import { useCreateCourse, useUpdateCourse } from '@/services/api/courses'
-import type { Course, CourseBody } from '@/utils/types'
+import type { Course, CourseBody, CourseKind } from '@/utils/types'
-const props = defineProps<{ course?: Course }>()
+const props = defineProps<{ kind: CourseKind; course?: Course }>()
 const open = defineModel<boolean>('open', { required: true })
 const { t } = useI18n()
 /** Prefix of the texts of the form */
 const k = computed(() => (props.kind === 'course' ? 'courses' : 'associations'))
 const isCourse = computed(() => props.kind === 'course')
 const createCourse = useCreateCourse()
 const updateCourse = useUpdateCourse()
@ -61,7 +65,7 @@ const errors = computed(() => {
  const url = mainPageUrl.value.trim()
  return {
    name: !name.value.trim(),
-    teachers: !teachers.value.some((teacher) => teacher.trim()),
+    teachers: isCourse.value && !teachers.value.some((teacher) => teacher.trim()),
    mainPage: url !== '' && !/^https?:\/\//.test(url),
  }
 })
@ -74,6 +78,7 @@ async function submit() {
  if (!isValid.value) return
  const body: CourseBody = {
    kind: props.kind,
    name: name.value.trim(),
    code: code.value.trim() || null,
    teachers: teachers.value.map((teacher) => teacher.trim()).filter(Boolean),
@ -83,14 +88,14 @@ async function submit() {
  try {
    if (props.course) {
      await updateCourse.mutateAsync({ id: props.course.id, body })
-      toast.success(t('courses.updated'))
+      toast.success(t(`${k.value}.updated`))
    } else {
      await createCourse.mutateAsync(body)
-      toast.success(t('courses.created'))
+      toast.success(t(`${k.value}.created`))
    }
    open.value = false
  } catch (err) {
-    toast.error(t('courses.save-error'), {
+    toast.error(t(`${k.value}.save-error`), {
      description: err instanceof Error ? err.message : undefined,
    })
  }
@ -101,8 +106,8 @@ async function submit() {
  <Dialog v-model:open="open">
    <DialogContent class="max-h-[90svh] overflow-y-auto sm:max-w-lg">
      <DialogHeader>
-        <DialogTitle>{{ course ? $t('courses.edit') : $t('courses.new') }}</DialogTitle>
+        <DialogTitle>{{ course ? $t(`${k}.edit`) : $t(`${k}.new`) }}</DialogTitle>
-        <DialogDescription>{{ $t('courses.form.description') }}</DialogDescription>
+        <DialogDescription>{{ $t(`${k}.form.description`) }}</DialogDescription>
      </DialogHeader>
      <form id="course-form" class="flex flex-col gap-5" novalidate @submit.prevent="submit">
@ -112,7 +117,7 @@ async function submit() {
            <Input
              id="course-name"
              v-model="name"
-              :placeholder="$t('courses.form.name-placeholder')"
+              :placeholder="$t(`${k}.form.name-placeholder`)"
              :aria-invalid="submitted && errors.name"
            />
            <p v-if="submitted && errors.name" class="text-sm text-destructive">
@ -121,7 +126,7 @@ async function submit() {
          </div>
          <div class="flex flex-col gap-2">
            <Label for="course-code">
-              {{ $t('courses.form.code') }}
+              {{ $t(`${k}.form.code`) }}
              <span class="font-normal text-muted-foreground">
                ({{ $t('courses.form.optional') }})
              </span>
@ -129,12 +134,12 @@ async function submit() {
            <Input
              id="course-code"
              v-model="code"
-              :placeholder="$t('courses.form.code-placeholder')"
+              :placeholder="$t(`${k}.form.code-placeholder`)"
            />
          </div>
        </div>
-        <div class="flex flex-col gap-2">
+        <div v-if="isCourse" class="flex flex-col gap-2">
          <Label for="course-teachers">{{ $t('courses.form.teachers') }}</Label>
          <TagsInput
            v-model="teachers"
@ -168,7 +173,7 @@ async function submit() {
            id="course-main-page"
            v-model="mainPageUrl"
            type="url"
-            :placeholder="$t('courses.form.main-page-placeholder')"
+            :placeholder="$t(`${k}.form.main-page-placeholder`)"
            :aria-invalid="submitted && errors.mainPage"
          />
          <p v-if="submitted && errors.mainPage" class="text-sm text-destructive">
--- a/frontend/src/components/schedule/SlotFormDialog.vue
+++ b/frontend/src/components/schedule/SlotFormDialog.vue
@ -1,5 +1,8 @@
 <script setup lang="ts">
-/** Adds a slot to a course, prefilled with the time range selected in the schedule */
+/**
 * Adds a slot to a course or an association, prefilled with the time range selected in
 * the schedule. `courseId` picks the course.
 */
 import { computed, ref, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { toast } from 'vue-sonner'
@ -18,7 +21,9 @@ import { Label } from '@/components/ui/label'
 import {
  Select,
  SelectContent,
  SelectGroup,
  SelectItem,
  SelectLabel,
  SelectTrigger,
  SelectValue,
 } from '@/components/ui/select'
@ -33,7 +38,7 @@ import {
  type SlotSelection,
 } from '@/utils/timetable'
-const props = defineProps<{ selection?: SlotSelection }>()
+const props = defineProps<{ selection?: SlotSelection; courseId?: number }>()
 const open = defineModel<boolean>('open', { required: true })
 const { t } = useI18n()
@ -41,7 +46,13 @@ const { data: courses } = useCourses()
 const { data: tags } = useTags('slot')
 const addSlot = useAddSlot()
-const courseId = ref<number>()
+const groups = computed(() =>
  (['course', 'association'] as const)
    .map((kind) => ({ kind, courses: courses.value?.filter((c) => c.kind === kind) ?? [] }))
    .filter((group) => group.courses.length),
 )
 const pickedCourseId = ref<number>()
 const tagId = ref<number>()
 const weekday = ref(1)
 const start = ref('')
@ -56,8 +67,10 @@ watch(
    weekday.value = props.selection?.weekday ?? 1
    start.value = props.selection?.start ?? '08:15'
    end.value = props.selection?.end ?? '10:00'
-    if (!courses.value?.some((course) => course.id === courseId.value)) {
+    if (props.courseId !== undefined) {
-      courseId.value = courses.value?.[0]?.id
+      pickedCourseId.value = props.courseId
    } else if (!courses.value?.some((course) => course.id === pickedCourseId.value)) {
      pickedCourseId.value = courses.value?.[0]?.id
    }
    tagId.value ??= tags.value[0]?.id
    submitted.value = false
@ -70,7 +83,7 @@ const errors = computed(() => {
  const startMinutes = toMinutes(start.value)
  const endMinutes = toMinutes(end.value)
  return {
-    course: courseId.value === undefined,
+    course: pickedCourseId.value === undefined,
    time:
      !start.value ||
      !end.value ||
@ -83,11 +96,11 @@ const errors = computed(() => {
 async function submit() {
  submitted.value = true
  if (errors.value.course || errors.value.time) return
-  if (courseId.value === undefined || tagId.value === undefined) return
+  if (pickedCourseId.value === undefined || tagId.value === undefined) return
  try {
    await addSlot.mutateAsync({
-      courseId: courseId.value,
+      courseId: pickedCourseId.value,
      body: {
        tag_id: tagId.value,
        weekday: weekday.value,
@ -116,17 +129,20 @@ async function submit() {
      <form id="slot-form" class="grid grid-cols-2 gap-4" novalidate @submit.prevent="submit">
        <div class="col-span-2 flex flex-col gap-2">
          <Label for="slot-course">{{ $t('schedule.form.course') }}</Label>
-          <Select v-model="courseId">
+          <Select v-model="pickedCourseId">
            <SelectTrigger id="slot-course" class="w-full">
              <SelectValue />
            </SelectTrigger>
            <SelectContent>
-              <SelectItem v-for="course in courses" :key="course.id" :value="course.id">
+              <SelectGroup v-for="group in groups" :key="group.kind">
                <SelectLabel>{{ $t(`nav.${group.kind}s`) }}</SelectLabel>
                <SelectItem v-for="course in group.courses" :key="course.id" :value="course.id">
                  {{ course.name }}
                  <span v-if="course.code" class="font-mono text-xs text-muted-foreground">
                    {{ course.code }}
                  </span>
                </SelectItem>
              </SelectGroup>
            </SelectContent>
          </Select>
        </div>
--- a/frontend/src/components/timetable/WeekTimetable.vue
+++ b/frontend/src/components/timetable/WeekTimetable.vue
@ -5,8 +5,11 @@
 *  - `selectable`: a time range can be selected with the pointer, emitted as `select`
 *  - `linkToCourse`: clicking a slot opens the page of its course
 *  - `deletable`: each slot gets a button emitting `delete` (not with `linkToCourse`)
 *  - `dates`: the days of a real week (monday to friday), shown in the header. The `day`
 *    slot adds content under the header of each day (e.g. its deadlines).
 */
 import { computed, ref } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { RouterLink } from 'vue-router'
 import { X } from '@lucide/vue'
@ -22,6 +25,7 @@ import {
  toMinutes,
  type SlotSelection,
 } from '@/utils/timetable'
 import { coursePageRoute } from '@/utils/routes'
 import type { Course, Tag, TimeSlot } from '@/utils/types'
 const props = withDefaults(
@ -32,6 +36,7 @@ const props = withDefaults(
    deletable?: boolean
    /** Css height of the day columns */
    height?: string
    dates?: Date[]
  }>(),
  { height: '55rem' },
 )
@ -41,8 +46,20 @@ const emit = defineEmits<{
  delete: [slot: TimeSlot, course: Course]
 }>()
 defineSlots<{ day?: (props: { weekday: number; date?: Date }) => unknown }>()
 const { locale } = useI18n()
 const { tagsById } = useTags()
 /** "5 oct." */
 function dayOfMonth(date: Date) {
  return new Intl.DateTimeFormat(locale.value, { day: 'numeric', month: 'short' }).format(date)
 }
 function isToday(date: Date) {
  return date.toDateString() === new Date().toDateString()
 }
 const HOURS = Array.from(
  { length: DAY_END_HOUR - DAY_START_HOUR + 1 },
  (_, i) => DAY_START_HOUR + i,
@ -160,11 +177,25 @@ function endSelection() {
      <!-- Header: weekdays -->
      <div class="border-b" />
      <div
-        v-for="day in days"
+        v-for="(day, index) in days"
        :key="day.weekday"
-        class="border-b border-l px-2 py-3 text-center text-sm font-medium"
+        class="flex min-w-0 flex-col gap-1.5 border-b border-l px-2 py-3 text-center text-sm font-medium"
      >
        <span>
          {{ $t(`weekdays.${day.weekday}`) }}
          <span
            v-if="dates?.[index]"
            class="ml-1 rounded-full px-1.5 py-0.5 text-xs tabular-nums"
            :class="
              isToday(dates[index]!)
                ? 'bg-primary text-primary-foreground'
                : 'font-normal text-muted-foreground'
            "
          >
            {{ dayOfMonth(dates[index]!) }}
          </span>
        </span>
        <slot name="day" :weekday="day.weekday" :date="dates?.[index]" />
      </div>
      <!-- Hours column -->
@ -202,7 +233,7 @@ function endSelection() {
          <TooltipTrigger as-child>
            <component
              :is="linkToCourse ? RouterLink : 'div'"
-              :to="linkToCourse ? { name: 'course', params: { id: block.course.id } } : undefined"
+              :to="linkToCourse ? coursePageRoute(block.course) : undefined"
              class="group absolute flex flex-col gap-0.5 overflow-hidden rounded-md border-l-4 px-2 py-1 text-foreground transition-shadow hover:z-10 hover:shadow-md"
              :class="{ 'cursor-pointer': linkToCourse, 'cursor-default': !linkToCourse }"
              :style="blockStyle(block, lane, lanes)"
--- a/frontend/src/components/ui/alert-dialog/AlertDialogContent.vue
+++ b/frontend/src/components/ui/alert-dialog/AlertDialogContent.vue
@ -27,7 +27,7 @@ const forwarded = useForwardPropsEmits(delegatedProps, emits)
      v-bind="forwarded"
      :class="
        cn(
-          'fixed left-1/2 top-1/2 z-50 grid w-full max-w-lg -translate-x-1/2 -translate-y-1/2 gap-4 border bg-background p-6 shadow-lg duration-200 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 sm:rounded-lg',
+          'fixed left-1/2 top-1/2 z-50 grid w-full grid-cols-1 max-w-lg -translate-x-1/2 -translate-y-1/2 gap-4 border bg-background p-6 shadow-lg duration-200 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 sm:rounded-lg',
          props.class,
        )
      "
--- a/frontend/src/components/ui/dialog/DialogContent.vue
+++ b/frontend/src/components/ui/dialog/DialogContent.vue
@ -29,7 +29,7 @@ const forwarded = useForwardPropsEmits(delegatedProps, emits)
      v-bind="forwarded"
      :class="
        cn(
-          'fixed left-1/2 top-1/2 z-50 grid w-full max-w-lg -translate-x-1/2 -translate-y-1/2 gap-4 border bg-background p-6 shadow-lg duration-200 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[state=closed]:slide-out-to-left-1/2 data-[state=closed]:slide-out-to-top-[48%] data-[state=open]:slide-in-from-left-1/2 data-[state=open]:slide-in-from-top-[48%] sm:rounded-lg',
+          'fixed left-1/2 top-1/2 z-50 grid w-full grid-cols-1 max-w-lg -translate-x-1/2 -translate-y-1/2 gap-4 border bg-background p-6 shadow-lg duration-200 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 sm:rounded-lg',
          props.class,
        )
      "
--- a/frontend/src/lib/api.d.ts
+++ b/frontend/src/lib/api.d.ts
@ -75,7 +75,7 @@ export interface paths {
        path?: never
        cookie?: never
      }
-      /** @description A course, without its slots: they are added and removed one by one */
+      /** @description A course or an association, without its slots: they are added and removed one by one */
      requestBody: {
        content: {
          'application/json': components['schemas']['CourseBody']
@ -127,6 +127,10 @@ export interface paths {
      }
      requestBody?: never
      responses: {
        /**
         * @description A course, or an association: both have tasks, files and slots, only the courses have
         *      teachers and grades.
         */
        200: {
          headers: {
            [name: string]: unknown
@ -156,13 +160,17 @@ export interface paths {
        }
        cookie?: never
      }
-      /** @description A course, without its slots: they are added and removed one by one */
+      /** @description A course or an association, without its slots: they are added and removed one by one */
      requestBody: {
        content: {
          'application/json': components['schemas']['CourseBody']
        }
      }
      responses: {
        /**
         * @description A course, or an association: both have tasks, files and slots, only the courses have
         *      teachers and grades.
         */
        200: {
          headers: {
            [name: string]: unknown
@ -252,6 +260,10 @@ export interface paths {
        }
      }
      responses: {
        /**
         * @description A course, or an association: both have tasks, files and slots, only the courses have
         *      teachers and grades.
         */
        200: {
          headers: {
            [name: string]: unknown
@ -310,6 +322,10 @@ export interface paths {
      }
      requestBody?: never
      responses: {
        /**
         * @description A course, or an association: both have tasks, files and slots, only the courses have
         *      teachers and grades.
         */
        200: {
          headers: {
            [name: string]: unknown
@ -603,6 +619,41 @@ export interface paths {
    patch?: never
    trace?: never
  }
  '/api/tasks/todo': {
    parameters: {
      query?: never
      header?: never
      path?: never
      cookie?: never
    }
    /** Get the tasks not done of every course and association, with their subtasks, the closest deadline first */
    get: {
      parameters: {
        query?: never
        header?: never
        path?: never
        cookie?: never
      }
      requestBody?: never
      responses: {
        200: {
          headers: {
            [name: string]: unknown
          }
          content: {
            'application/json': components['schemas']['TodoTask'][]
          }
        }
      }
    }
    put?: never
    post?: never
    delete?: never
    options?: never
    head?: never
    patch?: never
    trace?: never
  }
  '/api/courses/{id}/tasks': {
    parameters: {
      query?: never
@ -785,6 +836,117 @@ export interface paths {
    patch?: never
    trace?: never
  }
  '/api/tasks/{id}/focus': {
    parameters: {
      query?: never
      header?: never
      path?: never
      cookie?: never
    }
    get?: never
    put?: never
    /**
     * Start a focus session on a task, and its TimeTagger record
     * @description The session starts even when TimeTagger fails: see `timetagger_error`.
     */
    post: {
      parameters: {
        query?: never
        header?: never
        path: {
          id: number
        }
        cookie?: never
      }
      requestBody?: never
      responses: {
        /** @description A focus session started on a task */
        200: {
          headers: {
            [name: string]: unknown
          }
          content: {
            'application/json': components['schemas']['FocusStart']
          }
        }
        /** @description The task does not exist */
        404: {
          headers: {
            [name: string]: unknown
          }
          content: {
            'text/plain; charset=utf-8': unknown
          }
        }
      }
    }
    delete?: never
    options?: never
    head?: never
    patch?: never
    trace?: never
  }
  '/api/tasks/{id}/focus/stop': {
    parameters: {
      query?: never
      header?: never
      path?: never
      cookie?: never
    }
    get?: never
    put?: never
    /** End or pause a focus session: its time is added to the task */
    post: {
      parameters: {
        query?: never
        header?: never
        path: {
          id: number
        }
        cookie?: never
      }
      /** @description End (or pause) of a focus session */
      requestBody: {
        content: {
          'application/json': components['schemas']['FocusStopBody']
        }
      }
      responses: {
        /** @description End of a focus session */
        200: {
          headers: {
            [name: string]: unknown
          }
          content: {
            'application/json': components['schemas']['FocusStop']
          }
        }
        /** @description The session is too long */
        400: {
          headers: {
            [name: string]: unknown
          }
          content: {
            'text/plain; charset=utf-8': unknown
          }
        }
        /** @description The task does not exist */
        404: {
          headers: {
            [name: string]: unknown
          }
          content: {
            'text/plain; charset=utf-8': unknown
          }
        }
      }
    }
    delete?: never
    options?: never
    head?: never
    patch?: never
    trace?: never
  }
  '/api/courses/{id}/files': {
    parameters: {
      query?: never
@ -1064,6 +1226,7 @@ export interface components {
      course_code?: string | null
      /** Format: int32 */
      course_id: number
      course_kind: components['schemas']['CourseKind']
      course_name: string
      /** Format: date-time */
      deadline: string
@ -1076,32 +1239,45 @@ export interface components {
      /** Format: int32 */
      task_id: number
    }
    /**
     * @description A course, or an association: both have tasks, files and slots, only the courses have
     *      teachers and grades.
     */
    Course: {
-      /** @description e.g. "CS-477" */
+      /** @description e.g. "CS-477", or the acronym of an association */
      code?: string | null
      /** @description Folder of its files in the storage, e.g. `Cours/CS-477 Advanced operating systems` */
      folder: string
      /** Format: int32 */
      id: number
      kind: components['schemas']['CourseKind']
      /** @description Main page of the course, usually on moodle */
      main_page_url?: string | null
      /** @description e.g. "Advanced operating systems" */
      name: string
      /** @description Weekly slots, sorted by weekday then start time */
      slots: components['schemas']['TimeSlot'][]
-      /** @description At least one */
+      /** @description At least one for a course, none for an association */
      teachers: string[]
    }
-    /** @description A course, without its slots: they are added and removed one by one */
+    /** @description A course or an association, without its slots: they are added and removed one by one */
    CourseBody: {
      code?: string | null
      /** @description `course` by default. Cannot be changed once created. */
      kind?: components['schemas']['CourseKind'] | null
      /** @description http(s) url of the main page of the course */
      main_page_url?: string | null
      name: string
-      /** @description At least one */
+      /**
       * @description At least one for a course
       * @default []
       */
      teachers: string[]
    }
    /**
     * @description A file of a course: lecture notes written in the app, or (soon) an uploaded file.
-     *      Only the metadata is in the database, the content is in the storage (the NAS).
+     *      Only the metadata is in the database, the content is in the storage (the NAS), in the
     *      folder of the course.
     */
    CourseFile: {
      /** Format: int32 */
@ -1115,6 +1291,8 @@ export interface components {
      kind: components['schemas']['FileKind']
      /** @description For a note, e.g. "Lecture 2 Notes: Memory subsystem", the subtitle of its pdf */
      name: string
      /** @description Path in the folder of the course, without extension, e.g. `Notes/Lecture 1 Notes` */
      path: string
      /** @description e.g. slides, notes */
      tag_ids: number[]
      /** Format: date-time */
@ -1134,10 +1312,20 @@ export interface components {
       */
      total_weight: number
    }
    /** @enum {string} */
    CourseKind: 'course' | 'association'
    CoursePath: {
      /** Format: int32 */
      id: number
    }
    /** @description What a task needs to show of its course */
    CourseSummary: {
      code?: string | null
      /** Format: int32 */
      id: number
      kind: components['schemas']['CourseKind']
      name: string
    }
    /** @description Every task of a course */
    CourseTasks: {
      /**
@ -1170,6 +1358,49 @@ export interface components {
      tag_ids: number[]
    }
    FileKind: 'note' | 'upload'
    /** @description A focus session started on a task */
    FocusStart: {
      course: components['schemas']['CourseSummary']
      name: string
      /** @description Name of the parent task, for a subtask */
      parent_name?: string | null
      /** Format: date-time */
      started_at: string
      /** @description Tags of the task, or of its parent for a subtask without any */
      tag_ids: number[]
      /** Format: int32 */
      task_id: number
      /**
       * Format: int32
       * @description Seconds already spent on the task before this session
       */
      time_spent: number
      /** @description The running record, `None` when TimeTagger is not configured or failed */
      timetagger?: components['schemas']['TimetaggerRecord'] | null
      /** @description Whether TimeTagger is configured */
      timetagger_enabled: boolean
      /** @description Why TimeTagger failed, the session runs anyway */
      timetagger_error?: string | null
    }
    /** @description End of a focus session */
    FocusStop: {
      /**
       * Format: int32
       * @description Seconds spent on the task, this session included
       */
      time_spent: number
      timetagger_error?: string | null
    }
    /** @description End (or pause) of a focus session */
    FocusStopBody: {
      /**
       * Format: uint32
       * @description Length of the session, at most 24 hours
       */
      seconds: number
      /** @description Record returned when the session started, to stop it */
      timetagger?: components['schemas']['TimetaggerRecord'] | null
    }
    /** @description A grade on any scale: `score` out of `max_score` */
    Grade: {
      /** Format: int32 */
@ -1234,6 +1465,8 @@ export interface components {
      kind: components['schemas']['FileKind']
      /** @description For a note, e.g. "Lecture 2 Notes: Memory subsystem", the subtitle of its pdf */
      name: string
      /** @description Path in the folder of the course, without extension, e.g. `Notes/Lecture 1 Notes` */
      path: string
      /** @description e.g. slides, notes */
      tag_ids: number[]
      /** Format: date-time */
@ -1279,6 +1512,8 @@ export interface components {
      name: components['schemas']['LocalizedString']
      /** @description What the tag can label */
      scopes: components['schemas']['TagScope'][]
      /** @description Stable name, e.g. `homework` */
      slug?: string | null
    }
    /** @enum {string} */
    TagScope: 'slot' | 'task' | 'file'
@ -1307,6 +1542,11 @@ export interface components {
      /** @description Sorted like the tasks. Always empty for a subtask: there is only one level. */
      subtasks: components['schemas']['Task'][]
      tag_ids: number[]
      /**
       * Format: int32
       * @description Seconds spent working on it, counted by the pomodoro
       */
      time_spent: number
    }
    TaskBody: {
      description?: string | null
@ -1362,6 +1602,26 @@ export interface components {
       */
      weekday: number
    }
    /**
     * @description Record of TimeTagger (https://timetagger.app) counting a focus session. Kept by the
     *      client while the session runs, and sent back to stop it.
     */
    TimetaggerRecord: {
      /** @description Description holding the tags, e.g. `#cs-477 #homework #exercise-set-3` */
      ds: string
      key: string
      /**
       * Format: int64
       * @description Start, unix timestamp in seconds
       */
      t1: number
    }
    /** @description A task not done yet, with its course, for the list of the things to do */
    TodoTask: {
      course: components['schemas']['CourseSummary']
      /** @description With all its subtasks, the ones done included */
      task: components['schemas']['Task']
    }
  }
  responses: never
  parameters: never
--- a/frontend/src/locales/en.yml
+++ b/frontend/src/locales/en.yml
@ -7,6 +7,7 @@ nav:
  home: Home
  schedule: Timetable
  courses: Courses
  associations: Associations
  pomodoro: Pomodoro
  calendar: Calendar
  settings: Settings
@ -16,7 +17,8 @@ home:
  sections:
    schedule: Check your weekly timetable.
    courses: Find your courses and their resources.
-    pomodoro: Work in focused sessions with regular breaks.
+    associations: Follow the tasks and meetings of your associations.
    pomodoro: Focus on a task, the time is counted for you.
    calendar: Keep an eye on your exams and deadlines.
 theme:
  dark: Switch to dark mode
@ -47,7 +49,7 @@ courses:
  save-error: Unable to save the course
  delete-error: Unable to delete the course
  delete-title: Do you really want to delete “{name}”?
-  delete-description: The course and all its slots will be permanently deleted.
+  delete-description: The course, its slots, tasks and files will be permanently deleted.
  form:
    description: Slots are then added from the timetable.
    name: Name
@ -68,9 +70,38 @@ courses:
      teachers: Add at least one teacher.
      main-page: The address must start with http:// or https://.
      slot-time: Each slot must start before it ends, between 8:00 and 19:00.
 associations:
  new: New association
  edit: Edit association
  empty: No association yet.
  empty-hint: Add your associations to follow their tasks and meetings.
  load-error: Unable to load the associations.
  created: Association created
  updated: Association updated
  deleted: Association deleted
  save-error: Unable to save the association
  delete-error: Unable to delete the association
  delete-title: Do you really want to delete “{name}”?
  delete-description: The association, its slots, tasks and files will be permanently deleted.
  form:
    description: Its meetings are then added from the Deadlines tab or the timetable.
    name-placeholder: Cultural committee
    code: Acronym
    code-placeholder: CoCu
    main-page-placeholder: https://…
 association:
  back: Back to associations
  not-found: This association does not exist.
  tabs:
    files: Notes
    deadlines: Deadlines
  deadlines:
    hint: Click or drag on the week to add a weekly slot (meeting…).
    weekend: 'This weekend:'
 course:
  back: Back to courses
  not-found: This course does not exist.
  folder: Folder of the files on the NAS
  tabs:
    files: Lectures
    tasks: Deadlines
@ -139,8 +170,11 @@ tasks:
  add-subtask: Add a subtask…
  delete-title: Do you really want to delete “{name}”?
  delete-description: Its subtasks will be deleted too.
  time-spent: '{time} of work'
  form:
    description: Homework, an exam or anything else to do.
    course: Course or association
    course-placeholder: Choose…
    name: Name
    name-placeholder: Exercise set 3
    tags: Tags
@ -193,7 +227,9 @@ notes:
    theorem: Theorem
    example: Example
 files:
-  title: Course files
+  title:
    course: Course files
    association: Notes and files
  description: Slides, lecture notes and documents, soon stored on your NAS.
  upload: Upload
  coming-soon: File uploads are coming soon.
@ -205,17 +241,52 @@ files:
  delete-title: Do you really want to delete “{name}”?
  delete-description: The file will be permanently deleted.
 calendar:
-  tabs:
+  show: Show
-    courses: Courses
+  nothing-shown: Turn on the courses or the associations to see their tasks.
    associations: Associations
  today: Today
  previous: Previous month
  next: Next month
  this-week: This week
  previous-week: Previous week
  next-week: Next week
  more: '+{n} more'
  nothing: Nothing due that day.
  add-that-day: Add
  load-error: Unable to load the deadlines.
-  associations:
+  todo:
-    title: Association tasks
+    title: To do
-    coming-soon: The tasks of your associations will show up here. Associations are coming soon.
+    empty: Nothing to do, enjoy!
    late: Late
    today: Today
    week: This week
    later: Later
    undated: No deadline
 focus:
  start: Work on it (pomodoro)
  back: Back to the pomodoro
  pick: What do you want to work on?
  no-task: No task to do.
  start-free: Free session
  free: Free session
  elapsed: Focus time
  pause: Pause
  resume: Resume
  stop: Finish
  paused: Paused for {time}
  suggested-break: suggested break {time}
  cycles: '{n} cycle of 25 min | {n} cycles of 25 min'
  cycle-done: '{n} × 25 min of focus'
  cycle-hint: Well done! Take a break when you reach a good stopping point.
  total: '{time} in total on this task'
  space-hint: Space to pause
  stopped: Session finished · {time}
  resources: Resources
  no-resource: No notes or slides for this course.
  open-tab: Open in a new tab
  close-resource: Close
  fullscreen: Full screen
  exit-fullscreen: Exit full screen
  error: Unable to reach the server, the session did not change
  timetagger-error: TimeTagger could not be updated
 placeholder:
  coming-soon: This page is coming soon.
--- a/frontend/src/locales/fr.yml
+++ b/frontend/src/locales/fr.yml
@ -7,6 +7,7 @@ nav:
  home: Accueil
  schedule: Emploi du temps
  courses: Cours
  associations: Associations
  pomodoro: Pomodoro
  calendar: Calendrier
  settings: Configuration
@ -16,7 +17,8 @@ home:
  sections:
    schedule: Consulte ton emploi du temps de la semaine.
    courses: Retrouve tes cours et leurs ressources.
-    pomodoro: Travaille par sessions concentrées avec des pauses régulières.
+    associations: Suis les tâches et réunions de tes associations.
    pomodoro: Concentre-toi sur une tâche, le temps est compté pour toi.
    calendar: Garde un œil sur tes examens et échéances.
 theme:
  dark: Passer en mode sombre
@ -47,7 +49,7 @@ courses:
  save-error: Impossible d'enregistrer le cours
  delete-error: Impossible de supprimer le cours
  delete-title: Voulez-vous vraiment supprimer « {name} » ?
-  delete-description: Le cours et tous ses créneaux seront supprimés définitivement.
+  delete-description: Le cours, ses créneaux, ses tâches et ses fichiers seront supprimés définitivement.
  form:
    description: Les créneaux s'ajoutent ensuite depuis l'emploi du temps.
    name: Nom
@ -68,9 +70,38 @@ courses:
      teachers: Ajoute au moins un·e enseignant·e.
      main-page: L'adresse doit commencer par http:// ou https://.
      slot-time: Chaque créneau doit commencer avant de finir, entre 8h et 19h.
 associations:
  new: Nouvelle association
  edit: Modifier l'association
  empty: Aucune association pour le moment.
  empty-hint: Ajoute tes associations pour suivre leurs tâches et réunions.
  load-error: Impossible de charger les associations.
  created: Association créée
  updated: Association modifiée
  deleted: Association supprimée
  save-error: Impossible d'enregistrer l'association
  delete-error: Impossible de supprimer l'association
  delete-title: Voulez-vous vraiment supprimer « {name} » ?
  delete-description: L'association, ses créneaux, ses tâches et ses fichiers seront supprimés définitivement.
  form:
    description: Ses réunions s'ajoutent ensuite depuis l'onglet Échéances ou l'emploi du temps.
    name-placeholder: Commission culturelle
    code: Acronyme
    code-placeholder: CoCu
    main-page-placeholder: https://…
 association:
  back: Retour aux associations
  not-found: Cette association n'existe pas.
  tabs:
    files: Notes
    deadlines: Échéances
  deadlines:
    hint: Clique ou glisse sur la semaine pour ajouter un créneau récurrent (réunion…).
    weekend: 'Ce week-end :'
 course:
  back: Retour aux cours
  not-found: Ce cours n'existe pas.
  folder: Dossier des fichiers sur le NAS
  tabs:
    files: Cours
    tasks: Échéances
@ -139,8 +170,11 @@ tasks:
  add-subtask: Ajouter une sous-tâche…
  delete-title: Voulez-vous vraiment supprimer « {name} » ?
  delete-description: Ses sous-tâches seront aussi supprimées.
  time-spent: '{time} de travail'
  form:
    description: Un devoir, un examen ou toute autre chose à faire.
    course: Cours ou association
    course-placeholder: Choisis…
    name: Nom
    name-placeholder: Série 3
    tags: Étiquettes
@ -193,7 +227,9 @@ notes:
    theorem: Théorème
    example: Exemple
 files:
-  title: Fichiers du cours
+  title:
    course: Fichiers du cours
    association: Notes et fichiers
  description: Slides, notes de cours et documents, bientôt stockés sur ton NAS.
  upload: Importer
  coming-soon: L'import de fichiers arrive bientôt.
@ -205,17 +241,52 @@ files:
  delete-title: Voulez-vous vraiment supprimer « {name} » ?
  delete-description: Le fichier sera supprimé définitivement.
 calendar:
-  tabs:
+  show: Afficher
-    courses: Cours
+  nothing-shown: Active les cours ou les associations pour voir leurs tâches.
    associations: Associatif
  today: Aujourd'hui
  previous: Mois précédent
  next: Mois suivant
  this-week: Cette semaine
  previous-week: Semaine précédente
  next-week: Semaine suivante
  more: '+{n} autre | +{n} autres'
  nothing: Rien à rendre ce jour-là.
  add-that-day: Ajouter
  load-error: Impossible de charger les échéances.
-  associations:
+  todo:
-    title: Tâches associatives
+    title: À faire
-    coming-soon: Les tâches de tes associations apparaîtront ici. Les associations arrivent bientôt.
+    empty: Rien à faire, profite !
    late: En retard
    today: Aujourd'hui
    week: Cette semaine
    later: Plus tard
    undated: Sans échéance
 focus:
  start: Travailler dessus (pomodoro)
  back: Revenir au pomodoro
  pick: Sur quoi veux-tu travailler ?
  no-task: Aucune tâche à faire.
  start-free: Séance libre
  free: Séance libre
  elapsed: Temps de concentration
  pause: Pause
  resume: Reprendre
  stop: Terminer
  paused: En pause depuis {time}
  suggested-break: pause conseillée {time}
  cycles: '{n} cycle de 25 min | {n} cycles de 25 min'
  cycle-done: '{n} × 25 min de concentration'
  cycle-hint: Bravo ! Fais une pause quand tu arrives à un bon moment.
  total: '{time} au total sur cette tâche'
  space-hint: Espace pour mettre en pause
  stopped: Séance terminée · {time}
  resources: Ressources
  no-resource: Aucune note ni slide pour ce cours.
  open-tab: Ouvrir dans un nouvel onglet
  close-resource: Fermer
  fullscreen: Plein écran
  exit-fullscreen: Quitter le plein écran
  error: Impossible de joindre le serveur, la séance n'a pas changé
  timetagger-error: TimeTagger n'a pas pu être mis à jour
 placeholder:
  coming-soon: Cette page arrive bientôt.
--- a/frontend/src/router/index.ts
+++ b/frontend/src/router/index.ts
@ -1,4 +1,4 @@
-import { createRouter, createWebHistory } from 'vue-router'
+import { createRouter, createWebHistory, type RouteLocationNormalized } from 'vue-router'
 import HomeView from '@/views/HomeView.vue'
@ -21,30 +21,37 @@ const router = createRouter({
      component: () => import('@/views/ScheduleView.vue'),
      meta: { title: 'nav.schedule' },
    },
    // The associations share the pages of the courses: see `utils/routes.ts`
    ...(['course', 'association'] as const).flatMap((kind) => {
      const list = `${kind}s`
      return [
        {
-      name: 'courses',
+          name: list,
-      path: '/courses',
+          path: `/${list}`,
          component: () => import('@/views/CoursesView.vue'),
-      meta: { title: 'nav.courses' },
+          props: { kind },
          meta: { title: `nav.${list}` },
        },
        {
-      name: 'course',
+          name: kind,
-      path: '/courses/:id(\\d+)',
+          path: `/${list}/:id(\\d+)`,
          component: () => import('@/views/CourseView.vue'),
-      props: (route) => ({ id: Number(route.params.id) }),
+          props: (route: RouteLocationNormalized) => ({ id: Number(route.params.id) }),
-      meta: { title: 'nav.courses', section: 'courses' },
+          meta: { title: `nav.${list}`, section: list },
        },
        {
-      name: 'course-note',
+          name: `${kind}-note`,
          // `new` to write a new note
-      path: '/courses/:id(\\d+)/notes/:noteId(\\d+|new)',
+          path: `/${list}/:id(\\d+)/notes/:noteId(\\d+|new)`,
          component: () => import('@/views/LectureNoteView.vue'),
-      props: (route) => ({
+          props: (route: RouteLocationNormalized) => ({
            id: Number(route.params.id),
            noteId: route.params.noteId === 'new' ? undefined : Number(route.params.noteId),
          }),
-      meta: { title: 'nav.courses', section: 'courses' },
+          meta: { title: `nav.${list}`, section: list },
        },
      ]
    }),
    {
      name: 'pomodoro',
      path: '/pomodoro',
--- a/frontend/src/router/navigation.ts
+++ b/frontend/src/router/navigation.ts
@ -1,5 +1,5 @@
 import type { Component } from 'vue'
-import { BookOpen, CalendarClock, CalendarDays, Timer } from '@lucide/vue'
+import { BookOpen, CalendarClock, CalendarDays, Timer, Users } from '@lucide/vue'
 export interface NavigationEntry {
  /** Route name, see `router/index.ts` */
@ -21,6 +21,12 @@ export const sections: NavigationEntry[] = [
    icon: CalendarClock,
  },
  { name: 'courses', title: 'nav.courses', description: 'home.sections.courses', icon: BookOpen },
  {
    name: 'associations',
    title: 'nav.associations',
    description: 'home.sections.associations',
    icon: Users,
  },
  { name: 'pomodoro', title: 'nav.pomodoro', description: 'home.sections.pomodoro', icon: Timer },
  {
    name: 'calendar',
--- a/frontend/src/services/api/course-files.ts
+++ b/frontend/src/services/api/course-files.ts
@ -5,7 +5,7 @@ import { toValue, type MaybeRefOrGetter } from 'vue'
 import type { CourseFile, LectureNoteBody } from '@/utils/types'
 import { getClient } from './client'
-function filesKey(courseId: MaybeRefOrGetter<number>) {
+function filesKey(courseId: MaybeRefOrGetter<number | undefined>) {
  return ['course', courseId, 'files']
 }
@ -22,13 +22,14 @@ export function lectureNotePdfUrl(note: CourseFile) {
  return `/api/notes/${note.id}/pdf?v=${encodeURIComponent(note.updated_at)}`
 }
-/** Files of a course (lecture notes...), without their content */
+/** Files of a course (lecture notes...), without their content. Disabled without course. */
-export function useCourseFiles(courseId: MaybeRefOrGetter<number>) {
+export function useCourseFiles(courseId: MaybeRefOrGetter<number | undefined>) {
  return useQuery({
    queryKey: filesKey(courseId),
    enabled: () => toValue(courseId) !== undefined,
    queryFn: async () => {
      const { data, response } = await getClient().GET('/api/courses/{id}/files', {
-        params: { path: { id: toValue(courseId) } },
+        params: { path: { id: toValue(courseId)! } },
      })
      return response.status === HttpStatus.OK && data ? data : unexpected(response.status)
    },
--- a/frontend/src/services/api/courses.ts
+++ b/frontend/src/services/api/courses.ts
@ -1,8 +1,8 @@
 import { useMutation, useQuery, useQueryClient, type QueryClient } from '@tanstack/vue-query'
 import { HttpStatus } from 'http-status-ts'
-import { toValue, type MaybeRefOrGetter } from 'vue'
+import { computed, toValue, type MaybeRefOrGetter } from 'vue'
-import type { Course, CourseBody, TimeSlotBody } from '@/utils/types'
+import type { Course, CourseBody, CourseKind, TimeSlotBody } from '@/utils/types'
 import { getClient } from './client'
 const COURSES_KEY = ['courses']
@ -23,6 +23,7 @@ function storeCourse(queryClient: QueryClient, course: Course) {
  queryClient.setQueryData(courseKey(course.id), course)
 }
 /** Every course and association, sorted by name */
 export function useCourses() {
  return useQuery({
    queryKey: COURSES_KEY,
@ -36,6 +37,13 @@ export function useCourses() {
  })
 }
 /** Only the courses, or only the associations */
 export function useCoursesOfKind(kind: MaybeRefOrGetter<CourseKind>) {
  const query = useCourses()
  const data = computed(() => query.data.value?.filter((c) => c.kind === toValue(kind)))
  return { ...query, data }
 }
 export function useCourse(id: MaybeRefOrGetter<number>) {
  const queryClient = useQueryClient()
  return useQuery({
--- a/frontend/src/services/api/tasks.ts
+++ b/frontend/src/services/api/tasks.ts
@ -2,7 +2,15 @@ import { useMutation, useQuery, useQueryClient } from '@tanstack/vue-query'
 import { HttpStatus } from 'http-status-ts'
 import { toValue, type MaybeRefOrGetter } from 'vue'
-import type { CourseTasks, CreateTaskBody, Task, TaskBody } from '@/utils/types'
+import type {
  CourseTasks,
  CreateTaskBody,
  FocusStart,
  FocusStop,
  Task,
  TaskBody,
  TimetaggerRecord,
 } from '@/utils/types'
 import { getClient } from './client'
 // Every mutation answers with all the tasks of the course (nested, sorted) and the
@ -12,6 +20,8 @@ function tasksKey(courseId: MaybeRefOrGetter<number>) {
  return ['course', courseId, 'tasks']
 }
 const TODO_KEY = ['todo-tasks']
 function unexpected(status: number): never {
  throw new Error(`Unexpected status code received: ${status}`)
 }
@ -57,18 +67,34 @@ export function useCalendarTasks(period: MaybeRefOrGetter<{ from: string; to: st
  })
 }
-export function useTaskMutations(courseId: MaybeRefOrGetter<number>) {
+/** Tasks not done of every course and association, the closest deadline first */
 export function useTodoTasks() {
  return useQuery({
    queryKey: TODO_KEY,
    queryFn: async () => {
      const { data, response } = await getClient().GET('/api/tasks/todo')
      return response.status === HttpStatus.OK && data ? data : unexpected(response.status)
    },
  })
 }
 /**
 * Mutations of the tasks of any course: the course is given with each call. See
 * `useTaskMutations` for the tasks of a single course.
 */
 export function useAnyTaskMutations() {
  const queryClient = useQueryClient()
-  const onSuccess = (tasks: CourseTasks) => {
+  const onSuccess = (tasks: CourseTasks, { courseId }: { courseId: number }) => {
-    queryClient.setQueryData(tasksKey(toValue(courseId)), tasks)
+    queryClient.setQueryData(tasksKey(courseId), tasks)
-    // Refetched when the calendar is shown again
+    // Refetched when they are shown again
    queryClient.invalidateQueries({ queryKey: ['calendar-tasks'] })
    queryClient.invalidateQueries({ queryKey: TODO_KEY })
  }
  const create = useMutation({
-    mutationFn: async (body: CreateTaskBody) => {
+    mutationFn: async ({ courseId, body }: { courseId: number; body: CreateTaskBody }) => {
      const { data, response } = await getClient().POST('/api/courses/{id}/tasks', {
-        params: { path: { id: toValue(courseId) } },
+        params: { path: { id: courseId } },
        body,
      })
      return response.status === HttpStatus.OK && data ? data : unexpected(response.status)
@ -77,7 +103,7 @@ export function useTaskMutations(courseId: MaybeRefOrGetter<number>) {
  })
  const update = useMutation({
-    mutationFn: async ({ id, body }: { id: number; body: TaskBody }) => {
+    mutationFn: async ({ id, body }: { courseId: number; id: number; body: TaskBody }) => {
      const { data, response } = await getClient().PUT('/api/tasks/{id}', {
        params: { path: { id } },
        body,
@ -88,7 +114,7 @@ export function useTaskMutations(courseId: MaybeRefOrGetter<number>) {
  })
  const remove = useMutation({
-    mutationFn: async (id: number) => {
+    mutationFn: async ({ id }: { courseId: number; id: number }) => {
      const { data, response } = await getClient().DELETE('/api/tasks/{id}', {
        params: { path: { id } },
      })
@ -99,3 +125,54 @@ export function useTaskMutations(courseId: MaybeRefOrGetter<number>) {
  return { create, update, remove }
 }
 /** Mutations of the tasks of a single course */
 export function useTaskMutations(courseId: MaybeRefOrGetter<number>) {
  const { create, update, remove } = useAnyTaskMutations()
  return {
    create: {
      ...create,
      mutateAsync: (body: CreateTaskBody) =>
        create.mutateAsync({ courseId: toValue(courseId), body }),
    },
    update: {
      ...update,
      mutateAsync: ({ id, body }: { id: number; body: TaskBody }) =>
        update.mutateAsync({ courseId: toValue(courseId), id, body }),
    },
    remove: {
      ...remove,
      mutateAsync: (id: number) => remove.mutateAsync({ courseId: toValue(courseId), id }),
    },
  }
 }
 /** Starts a focus session on a task, and its TimeTagger record */
 export async function startFocus(taskId: number): Promise<FocusStart> {
  const { data, response } = await getClient().POST('/api/tasks/{id}/focus', {
    params: { path: { id: taskId } },
  })
  return response.status === HttpStatus.OK && data ? data : unexpected(response.status)
 }
 /** Ends (or pauses) a focus session: its time is added to the task */
 export async function stopFocus(
  taskId: number,
  seconds: number,
  timetagger: TimetaggerRecord | null,
 ): Promise<FocusStop> {
  const { data, response } = await getClient().POST('/api/tasks/{id}/focus/stop', {
    params: { path: { id: taskId } },
    body: { seconds, timetagger },
  })
  return response.status === HttpStatus.OK && data ? data : unexpected(response.status)
 }
 /** The time spent on the tasks changed: shown again from the server */
 export function useRefreshTasks() {
  const queryClient = useQueryClient()
  return (courseId: number) => {
    queryClient.invalidateQueries({ queryKey: tasksKey(courseId) })
    queryClient.invalidateQueries({ queryKey: TODO_KEY })
  }
 }
--- a/frontend/src/services/focus.ts
+++ b/frontend/src/services/focus.ts
@ -0,0 +1,204 @@
 /**
 * Focus session of the pomodoro, shared by every page and kept across reloads. The
 * pomodoro counts up: the session runs until it is paused or stopped.
 *
 * On a task, every run (from a start or a resume to a pause or a stop) is sent to the
 * backend, which adds its time to the task and counts it in TimeTagger. A free session,
 * without task, stays in the browser.
 */
 import { computed, ref, watch } from 'vue'
 import { startFocus, stopFocus } from '@/services/api/tasks'
 import type { FocusStart, TimetaggerRecord } from '@/utils/types'
 /** One cycle of the classic pomodoro, in seconds: a break is suggested after each */
 export const CYCLE_SECONDS = 25 * 60
 export interface FocusSession {
  /** The task, `null` for a free session */
  task: FocusStart | null
  /** Seconds of the runs before the current one */
  accumulated: number
  /** Start of the current run (ms), `null` while paused */
  runningSince: number | null
  /** Start of the pause (ms), `null` while running */
  pausedAt: number | null
  /** TimeTagger record of the current run */
  record: TimetaggerRecord | null
  /** Seconds spent on the task before the session */
  spentBefore: number
 }
 const STORAGE_KEY = 'focus-session'
 function load(): FocusSession | null {
  try {
    const raw = window.localStorage.getItem(STORAGE_KEY)
    return raw ? (JSON.parse(raw) as FocusSession) : null
  } catch {
    return null
  }
 }
 const session = ref<FocusSession | null>(load())
 watch(
  session,
  (value) => {
    try {
      if (value) window.localStorage.setItem(STORAGE_KEY, JSON.stringify(value))
      else window.localStorage.removeItem(STORAGE_KEY)
    } catch {
      // Private browsing: the session is only lost on reload
    }
  },
  { deep: true },
 )
 /** Current time, refreshed every second */
 const now = ref(Date.now())
 window.setInterval(() => (now.value = Date.now()), 1000)
 /** Seconds of the current run */
 function runSeconds(value: FocusSession, at = now.value) {
  return value.runningSince === null ? 0 : Math.max(0, Math.round((at - value.runningSince) / 1000))
 }
 /** Seconds of focus of the session */
 const elapsed = computed(() =>
  session.value ? session.value.accumulated + runSeconds(session.value) : 0,
 )
 /** Seconds of the current pause */
 const pauseElapsed = computed(() =>
  session.value?.pausedAt
    ? Math.max(0, Math.round((now.value - session.value.pausedAt) / 1000))
    : 0,
 )
 const isRunning = computed(() => session.value?.runningSince != null)
 /** Busy talking to the backend */
 const pending = ref(false)
 async function withPending<T>(action: () => Promise<T>): Promise<T> {
  pending.value = true
  try {
    return await action()
  } finally {
    pending.value = false
  }
 }
 /** Sends a run of `seconds` to the backend. Returns the TimeTagger error, if any. */
 async function endRun(value: FocusSession, seconds: number): Promise<string | null> {
  if (!value.task) return null
  const result = await stopFocus(value.task.task_id, seconds, value.record)
  return result.timetagger_error ?? null
 }
 /**
 * Starts a session on a task (`null`: a free session), ending the running one. Returns
 * the TimeTagger error, if any: the session runs anyway.
 */
 async function start(taskId: number | null): Promise<string | null> {
  return withPending(async () => {
    if (session.value) await stopNow()
    if (taskId === null) {
      session.value = {
        task: null,
        accumulated: 0,
        runningSince: Date.now(),
        pausedAt: null,
        record: null,
        spentBefore: 0,
      }
      return null
    }
    const task = await startFocus(taskId)
    session.value = {
      task,
      accumulated: 0,
      runningSince: new Date(task.started_at).getTime(),
      pausedAt: null,
      record: task.timetagger ?? null,
      spentBefore: task.time_spent,
    }
    return task.timetagger_error ?? null
  })
 }
 async function pause(): Promise<string | null> {
  const value = session.value
  if (!value || value.runningSince === null) return null
  return withPending(async () => {
    const seconds = runSeconds(value, Date.now())
    const error = await endRun(value, seconds)
    value.accumulated += seconds
    value.runningSince = null
    value.pausedAt = Date.now()
    value.record = null
    return error
  })
 }
 async function resume(): Promise<string | null> {
  const value = session.value
  if (!value || value.runningSince !== null) return null
  return withPending(async () => {
    let error: string | null = null
    if (value.task) {
      const task = await startFocus(value.task.task_id)
      value.task = task
      value.record = task.timetagger ?? null
      error = task.timetagger_error ?? null
    }
    value.runningSince = Date.now()
    value.pausedAt = null
    return error
  })
 }
 async function stopNow(): Promise<string | null> {
  const value = session.value
  if (!value) return null
  const error =
    value.runningSince === null ? null : await endRun(value, runSeconds(value, Date.now()))
  session.value = null
  return error
 }
 /** Ends the session. Returns the TimeTagger error, if any. */
 async function stop(): Promise<string | null> {
  return withPending(stopNow)
 }
 export function useFocus() {
  return {
    session,
    elapsed,
    pauseElapsed,
    isRunning,
    pending,
    now,
    start,
    pause,
    resume,
    stop,
  }
 }
 /** 3725 -> "1:02:05", 125 -> "02:05" */
 export function formatDuration(seconds: number): string {
  const pad = (n: number) => String(n).padStart(2, '0')
  const hours = Math.floor(seconds / 3600)
  const minutes = Math.floor((seconds % 3600) / 60)
  const rest = seconds % 60
  return hours ? `${hours}:${pad(minutes)}:${pad(rest)}` : `${pad(minutes)}:${pad(rest)}`
 }
 /** 5400 -> "1 h 30", 600 -> "10 min" */
 export function formatSpent(seconds: number): string {
  const hours = Math.floor(seconds / 3600)
  const minutes = Math.floor((seconds % 3600) / 60)
  if (!hours) return `${minutes} min`
  return `${hours} h ${String(minutes).padStart(2, '0')}`
 }
--- a/frontend/src/utils/calendar.ts
+++ b/frontend/src/utils/calendar.ts
@ -7,7 +7,7 @@ export function dayKey(date: Date): string {
 }
 /** Monday of the week of `date`, at midnight */
-function startOfWeek(date: Date): Date {
+export function startOfWeek(date: Date): Date {
  const day = new Date(date.getFullYear(), date.getMonth(), date.getDate())
  const offset = (day.getDay() + 6) % 7
  day.setDate(day.getDate() - offset)
--- a/frontend/src/utils/routes.ts
+++ b/frontend/src/utils/routes.ts
@ -0,0 +1,43 @@
 /** Routes of the courses and the associations, which share their pages */
 import type { RouteLocationRaw } from 'vue-router'
 import type { CourseKind } from '@/utils/types'
 const NAMES = {
  course: { list: 'courses', page: 'course', note: 'course-note' },
  association: { list: 'associations', page: 'association', note: 'association-note' },
 } as const
 export function listRoute(kind: CourseKind): RouteLocationRaw {
  return { name: NAMES[kind].list }
 }
 export function coursePageRoute(
  course: { id: number; kind: CourseKind },
  tab?: string,
 ): RouteLocationRaw {
  return { name: NAMES[course.kind].page, params: { id: course.id }, query: tab ? { tab } : {} }
 }
 /** `noteId` 'new' to write a new note */
 export function noteRoute(
  course: { id: number; kind: CourseKind },
  noteId: number | 'new',
  edit = false,
 ): RouteLocationRaw {
  return {
    name: NAMES[course.kind].note,
    params: { id: course.id, noteId },
    query: edit ? { edit: '1' } : {},
  }
 }
 /** Tab listing the tasks, which differs between courses and associations */
 export function tasksTab(kind: CourseKind) {
  return kind === 'course' ? 'tasks' : 'deadlines'
 }
 /** Starts the pomodoro on a task */
 export function focusRoute(taskId: number): RouteLocationRaw {
  return { name: 'pomodoro', query: { task: taskId } }
 }
--- a/frontend/src/utils/types.ts
+++ b/frontend/src/utils/types.ts
@ -5,6 +5,8 @@ type Schemas = components['schemas']
 export type LocalizedString = Schemas['LocalizedString']
 export type Course = Schemas['Course']
 export type CourseKind = Schemas['CourseKind']
 export type CourseSummary = Schemas['CourseSummary']
 export type CourseBody = Schemas['CourseBody']
 export type TimeSlot = Schemas['TimeSlot']
 export type TimeSlotBody = Schemas['TimeSlotBody']
@ -16,6 +18,10 @@ export type TaskBody = Schemas['TaskBody']
 export type CreateTaskBody = Schemas['CreateTaskBody']
 export type CourseTasks = Schemas['CourseTasks']
 export type CalendarTask = Schemas['CalendarTask']
 export type TodoTask = Schemas['TodoTask']
 export type FocusStart = Schemas['FocusStart']
 export type FocusStop = Schemas['FocusStop']
 export type TimetaggerRecord = Schemas['TimetaggerRecord']
 export type CourseFile = Schemas['CourseFile']
 export type TagScope = Schemas['TagScope']
 export type LectureNoteBody = Schemas['LectureNoteBody']
--- a/frontend/src/views/CalendarView.vue
+++ b/frontend/src/views/CalendarView.vue
@ -1,41 +1,113 @@
 <script setup lang="ts">
-/** Deadlines of every course in a month calendar, and (soon) the ones of the associations */
+/**
-import { computed } from 'vue'
+ * Deadlines of the courses and associations in a month calendar, next to everything left
-import { useRoute, useRouter } from 'vue-router'
+ * to do. Courses and associations can each be hidden, and tasks created from here.
-import { Users } from '@lucide/vue'
+ */
 import { computed, ref, watch } from 'vue'
 import { BookOpen, Plus, Users } from '@lucide/vue'
-import CoursesCalendar from '@/components/calendar/CoursesCalendar.vue'
+import TasksCalendar from '@/components/calendar/TasksCalendar.vue'
-import { Card, CardDescription, CardTitle } from '@/components/ui/card'
+import TodoList from '@/components/calendar/TodoList.vue'
-import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs'
+import TaskFormDialog from '@/components/course/TaskFormDialog.vue'
 import { Button } from '@/components/ui/button'
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
 import type { CourseKind } from '@/utils/types'
-const route = useRoute()
+const KINDS: { kind: CourseKind; icon: typeof BookOpen }[] = [
-const router = useRouter()
+  { kind: 'course', icon: BookOpen },
  { kind: 'association', icon: Users },
 ]
-const TABS = ['courses', 'associations'] as const
+// Remembered in the browser: only a convenience
-type Tab = (typeof TABS)[number]
+const STORAGE_KEY = 'calendar-kinds'
-const tab = computed<Tab>({
+function loadKinds(): CourseKind[] {
-  get: () => TABS.find((tab) => tab === route.query.tab) ?? 'courses',
+  try {
-  set: (tab) => router.replace({ query: { ...route.query, tab } }),
+    const saved = JSON.parse(window.localStorage.getItem(STORAGE_KEY) ?? 'null')
    if (Array.isArray(saved)) return saved.filter((k) => k === 'course' || k === 'association')
  } catch {
    // Unavailable or invalid: everything is shown
  }
  return ['course', 'association']
 }
 const kinds = ref<CourseKind[]>(loadKinds())
 watch(kinds, (value) => {
  try {
    window.localStorage.setItem(STORAGE_KEY, JSON.stringify(value))
  } catch {
    // Not remembered
  }
 })
 function toggle(kind: CourseKind) {
  kinds.value = kinds.value.includes(kind)
    ? kinds.value.filter((k) => k !== kind)
    : [...kinds.value, kind]
 }
 const formOpen = ref(false)
 const defaultDeadline = ref<string>()
 /** New task, due at the end of `day` when given */
 function openForm(day?: Date) {
  if (day) {
    const end = new Date(day)
    end.setHours(23, 59, 0, 0)
    defaultDeadline.value = end.toISOString()
  } else {
    defaultDeadline.value = undefined
  }
  formOpen.value = true
 }
 const nothingShown = computed(() => !kinds.value.length)
 </script>
 <template>
-  <Tabs v-model="tab" class="mx-auto max-w-6xl gap-4">
+  <div class="mx-auto flex max-w-7xl flex-col gap-4">
-    <TabsList>
+    <div class="flex flex-wrap items-center gap-2">
-      <TabsTrigger v-for="name in TABS" :key="name" :value="name">
+      <div class="flex gap-2" role="group" :aria-label="$t('calendar.show')">
-        {{ $t(`calendar.tabs.${name}`) }}
+        <button
-      </TabsTrigger>
+          v-for="{ kind, icon } in KINDS"
-    </TabsList>
+          :key="kind"
-    <TabsContent value="courses" class="min-w-0">
+          type="button"
-      <CoursesCalendar />
+          class="inline-flex items-center gap-2 rounded-full border px-3 py-1.5 text-sm transition-colors"
-    </TabsContent>
+          :class="
-    <TabsContent value="associations">
+            kinds.includes(kind)
-      <Card class="mx-auto flex max-w-md flex-col items-center gap-2 p-8 text-center">
+              ? 'border-primary bg-primary/10 font-medium text-primary'
-        <Users class="mb-2 size-8 text-muted-foreground" />
+              : 'text-muted-foreground hover:bg-accent'
-        <CardTitle class="text-base">{{ $t('calendar.associations.title') }}</CardTitle>
+          "
-        <CardDescription>{{ $t('calendar.associations.coming-soon') }}</CardDescription>
+          :aria-pressed="kinds.includes(kind)"
          @click="toggle(kind)"
        >
          <component :is="icon" class="size-4" />
          {{ $t(`nav.${kind}s`) }}
        </button>
      </div>
      <Button class="ml-auto" @click="openForm()">
        <Plus />
        {{ $t('tasks.new') }}
      </Button>
    </div>
    <p v-if="nothingShown" class="text-sm text-muted-foreground">
      {{ $t('calendar.nothing-shown') }}
    </p>
    <div class="grid items-start gap-4 lg:grid-cols-[minmax(0,1fr)_22rem]">
      <TasksCalendar :kinds="kinds" class="min-w-0" @create="openForm" />
      <Card class="lg:sticky lg:top-4 lg:max-h-[calc(100svh-6rem)] lg:overflow-y-auto">
        <CardHeader>
          <CardTitle class="text-base">{{ $t('calendar.todo.title') }}</CardTitle>
        </CardHeader>
        <CardContent>
          <TodoList :kinds="kinds" />
        </CardContent>
      </Card>
-    </TabsContent>
+    </div>
-  </Tabs>
+
    <TaskFormDialog v-model:open="formOpen" :default-deadline="defaultDeadline" />
  </div>
 </template>
--- a/frontend/src/views/CourseView.vue
+++ b/frontend/src/views/CourseView.vue
@ -1,9 +1,13 @@
 <script setup lang="ts">
-/** Personal page of a course: its files, deadlines, timetable and grades */
+/**
-import { computed } from 'vue'
+ * Personal page of a course: its files, deadlines, timetable and grades. An association
 * has its notes, and its deadlines on top of its timetable.
 */
 import { computed, watch } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
-import { ArrowLeft, ExternalLink } from '@lucide/vue'
+import { ArrowLeft, ExternalLink, Folder } from '@lucide/vue'
 import AssociationDeadlinesTab from '@/components/course/AssociationDeadlinesTab.vue'
 import CourseFilesTab from '@/components/course/CourseFilesTab.vue'
 import CourseGradesTab from '@/components/course/CourseGradesTab.vue'
 import CourseScheduleTab from '@/components/course/CourseScheduleTab.vue'
@ -14,6 +18,7 @@ import { Card, CardFooter, CardHeader, CardTitle } from '@/components/ui/card'
 import { Skeleton } from '@/components/ui/skeleton'
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs'
 import { useCourse } from '@/services/api/courses'
 import { coursePageRoute, listRoute } from '@/utils/routes'
 const props = defineProps<{ id: number }>()
@ -21,22 +26,36 @@ const route = useRoute()
 const router = useRouter()
 const { data: course, isPending, isError, refetch } = useCourse(() => props.id)
-const TABS = ['files', 'tasks', 'schedule', 'grades'] as const
+/** Kind of the page, from the route: the course may not be loaded yet */
-type Tab = (typeof TABS)[number]
+const kind = computed(() => (route.name === 'association' ? 'association' : 'course'))
 const tabs = computed(() =>
  kind.value === 'course' ? ['files', 'tasks', 'schedule', 'grades'] : ['files', 'deadlines'],
 )
 // In the url, so that coming back from a note opens the files again
-const tab = computed<Tab>({
+const tab = computed<string>({
-  get: () => TABS.find((tab) => tab === route.query.tab) ?? 'files',
+  get: () => tabs.value.find((tab) => tab === route.query.tab) ?? 'files',
  set: (tab) => router.replace({ query: { ...route.query, tab } }),
 })
 // A course opened as an association (or the other way round): to its own page
 watch(
  () => course.value?.kind,
  (courseKind) => {
    if (courseKind && courseKind !== kind.value) {
      router.replace(coursePageRoute(course.value!, route.query.tab as string | undefined))
    }
  },
  { immediate: true },
 )
 </script>
 <template>
  <div class="mx-auto flex max-w-6xl flex-col gap-4">
    <Button variant="ghost" class="self-start" as-child>
-      <RouterLink :to="{ name: 'courses' }">
+      <RouterLink :to="listRoute(kind)">
        <ArrowLeft />
-        {{ $t('course.back') }}
+        {{ $t(`${kind}.back`) }}
      </RouterLink>
    </Button>
@ -44,7 +63,7 @@ const tab = computed<Tab>({
    <Card v-else-if="isError || !course" class="mx-auto max-w-md text-center">
      <CardHeader>
-        <CardTitle>{{ $t('course.not-found') }}</CardTitle>
+        <CardTitle>{{ $t(`${kind}.not-found`) }}</CardTitle>
      </CardHeader>
      <CardFooter class="justify-center">
        <Button variant="outline" @click="refetch()">{{ $t('common.retry') }}</Button>
@ -60,7 +79,16 @@ const tab = computed<Tab>({
              {{ course.code }}
            </Badge>
          </div>
-          <p class="text-sm text-muted-foreground">{{ course.teachers.join(', ') }}</p>
+          <p v-if="course.teachers.length" class="text-sm text-muted-foreground">
            {{ course.teachers.join(', ') }}
          </p>
          <p
            class="flex items-center gap-1.5 text-xs text-muted-foreground"
            :title="$t('course.folder')"
          >
            <Folder class="size-3.5" />
            <span class="font-mono">{{ course.folder }}</span>
          </p>
        </div>
        <Button v-if="course.main_page_url" variant="outline" as-child>
          <a :href="course.main_page_url" target="_blank" rel="noopener noreferrer">
@ -72,12 +100,15 @@ const tab = computed<Tab>({
      <Tabs v-model="tab" class="gap-4">
        <TabsList class="w-full justify-start overflow-x-auto sm:w-auto">
-          <TabsTrigger v-for="name in TABS" :key="name" :value="name">
+          <TabsTrigger v-for="name in tabs" :key="name" :value="name">
-            {{ $t(`course.tabs.${name}`) }}
+            {{ $t(`${kind}.tabs.${name}`) }}
          </TabsTrigger>
        </TabsList>
        <TabsContent value="files">
-          <CourseFilesTab :course-id="course.id" />
+          <CourseFilesTab :course="course" />
        </TabsContent>
        <TabsContent value="deadlines" class="min-w-0">
          <AssociationDeadlinesTab :course="course" />
        </TabsContent>
        <TabsContent value="tasks">
          <CourseTasksTab :course-id="course.id" />
--- a/frontend/src/views/CoursesView.vue
+++ b/frontend/src/views/CoursesView.vue
@ -1,8 +1,9 @@
 <script setup lang="ts">
-import { ref } from 'vue'
+/** List of the courses, or of the associations: both are managed the same way */
 import { computed, ref } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { toast } from 'vue-sonner'
-import { BookOpen, Pencil, Plus, Trash2 } from '@lucide/vue'
+import { BookOpen, Pencil, Plus, Trash2, Users } from '@lucide/vue'
 import CourseFormDialog from '@/components/courses/CourseFormDialog.vue'
 import {
@ -19,11 +20,17 @@ import { Badge } from '@/components/ui/badge'
 import { Button } from '@/components/ui/button'
 import { Card, CardDescription, CardFooter, CardHeader, CardTitle } from '@/components/ui/card'
 import { Skeleton } from '@/components/ui/skeleton'
-import { useCourses, useDeleteCourse } from '@/services/api/courses'
+import { useCoursesOfKind, useDeleteCourse } from '@/services/api/courses'
-import type { Course } from '@/utils/types'
+import { coursePageRoute } from '@/utils/routes'
 import type { Course, CourseKind } from '@/utils/types'
 const props = defineProps<{ kind: CourseKind }>()
 const { t } = useI18n()
-const { data: courses, isPending, isError, refetch } = useCourses()
+const { data: courses, isPending, isError, refetch } = useCoursesOfKind(() => props.kind)
 /** Prefix of the texts of the page */
 const k = computed(() => (props.kind === 'course' ? 'courses' : 'associations'))
 const deleteCourse = useDeleteCourse()
 const formOpen = ref(false)
@ -46,9 +53,9 @@ async function confirmDelete() {
  if (!deletedCourse.value) return
  try {
    await deleteCourse.mutateAsync(deletedCourse.value.id)
-    toast.success(t('courses.deleted'))
+    toast.success(t(`${k.value}.deleted`))
  } catch {
-    toast.error(t('courses.delete-error'))
+    toast.error(t(`${k.value}.delete-error`))
  }
 }
 </script>
@ -58,7 +65,7 @@ async function confirmDelete() {
    <div class="flex items-center justify-end">
      <Button @click="openForm()">
        <Plus />
-        {{ $t('courses.new') }}
+        {{ $t(`${k}.new`) }}
      </Button>
    </div>
@ -68,7 +75,7 @@ async function confirmDelete() {
    <Card v-else-if="isError" class="mx-auto max-w-md text-center">
      <CardHeader>
-        <CardTitle>{{ $t('courses.load-error') }}</CardTitle>
+        <CardTitle>{{ $t(`${k}.load-error`) }}</CardTitle>
      </CardHeader>
      <CardFooter class="justify-center">
        <Button variant="outline" @click="refetch()">{{ $t('common.retry') }}</Button>
@ -77,14 +84,17 @@ async function confirmDelete() {
    <Card v-else-if="!courses?.length" class="mx-auto max-w-md text-center">
      <CardHeader>
-        <BookOpen class="mx-auto mb-2 size-8 text-muted-foreground" />
+        <component
-        <CardTitle>{{ $t('courses.empty') }}</CardTitle>
+          :is="kind === 'course' ? BookOpen : Users"
-        <CardDescription>{{ $t('courses.empty-hint') }}</CardDescription>
+          class="mx-auto mb-2 size-8 text-muted-foreground"
        />
        <CardTitle>{{ $t(`${k}.empty`) }}</CardTitle>
        <CardDescription>{{ $t(`${k}.empty-hint`) }}</CardDescription>
      </CardHeader>
      <CardFooter class="justify-center">
        <Button @click="openForm()">
          <Plus />
-          {{ $t('courses.new') }}
+          {{ $t(`${k}.new`) }}
        </Button>
      </CardFooter>
    </Card>
@ -100,7 +110,7 @@ async function confirmDelete() {
          <div class="flex flex-wrap items-center gap-2">
            <CardTitle class="text-lg leading-snug">
              <RouterLink
-                :to="{ name: 'course', params: { id: course.id } }"
+                :to="coursePageRoute(course)"
                class="outline-none after:absolute after:inset-0 after:content-['']"
              >
                {{ course.name }}
@ -110,7 +120,9 @@ async function confirmDelete() {
              {{ course.code }}
            </Badge>
          </div>
-          <CardDescription>{{ course.teachers.join(', ') }}</CardDescription>
+          <CardDescription v-if="course.teachers.length">
            {{ course.teachers.join(', ') }}
          </CardDescription>
        </div>
        <div class="relative z-10 flex shrink-0 gap-1">
@ -132,15 +144,15 @@ async function confirmDelete() {
      </Card>
    </div>
-    <CourseFormDialog v-model:open="formOpen" :course="editedCourse" />
+    <CourseFormDialog v-model:open="formOpen" :kind="kind" :course="editedCourse" />
    <AlertDialog v-model:open="deleteOpen">
      <AlertDialogContent>
        <AlertDialogHeader>
          <AlertDialogTitle>
-            {{ $t('courses.delete-title', { name: deletedCourse?.name }) }}
+            {{ $t(`${k}.delete-title`, { name: deletedCourse?.name }) }}
          </AlertDialogTitle>
-          <AlertDialogDescription>{{ $t('courses.delete-description') }}</AlertDialogDescription>
+          <AlertDialogDescription>{{ $t(`${k}.delete-description`) }}</AlertDialogDescription>
        </AlertDialogHeader>
        <AlertDialogFooter>
          <AlertDialogCancel>{{ $t('common.cancel') }}</AlertDialogCancel>
--- a/frontend/src/views/HomeView.vue
+++ b/frontend/src/views/HomeView.vue
@ -10,7 +10,7 @@ import { sections } from '@/router/navigation'
      <p class="text-muted-foreground">{{ $t('home.subtitle') }}</p>
    </div>
-    <div class="grid gap-4 sm:grid-cols-2 xl:grid-cols-4">
+    <div class="grid gap-4 sm:grid-cols-2 lg:grid-cols-3 2xl:grid-cols-5">
      <RouterLink
        v-for="section in sections"
        :key="section.name"
--- a/frontend/src/views/LectureNoteView.vue
+++ b/frontend/src/views/LectureNoteView.vue
@ -23,6 +23,7 @@ import {
  useLectureNoteMutations,
  useCourseFiles,
 } from '@/services/api/course-files'
 import { coursePageRoute, noteRoute } from '@/utils/routes'
 import type { CourseFile } from '@/utils/types'
 const props = defineProps<{ id: number; noteId?: number }>()
@ -78,11 +79,8 @@ watch(
  { immediate: true },
 )
-const backTo = computed(() => ({
+const kind = computed(() => (route.name === 'association-note' ? 'association' : 'course'))
-  name: 'course',
+const backTo = computed(() => coursePageRoute({ id: props.id, kind: kind.value }, 'files'))
  params: { id: props.id },
  query: { tab: 'files' },
 }))
 async function submit() {
  if (!title.value.trim()) {
@ -97,11 +95,9 @@ async function submit() {
    saved.value = { title: title.value, content: content.value }
    pdfError.value = result.pdf_error ?? undefined
    if (isNew.value) {
-      await router.replace({
+      await router.replace(
-        name: 'course-note',
+        noteRoute({ id: props.id, kind: kind.value }, result.note.id, !!result.pdf_error),
-        params: { id: props.id, noteId: result.note.id },
+      )
        query: result.pdf_error ? { edit: '1' } : {},
      })
    }
    if (result.pdf_error) {
      toast.warning(t('notes.saved-without-pdf'))
@ -153,7 +149,7 @@ function pdfUrl(note: CourseFile) {
      <Button variant="ghost" as-child>
        <RouterLink :to="backTo">
          <ArrowLeft />
-          {{ course?.name ?? $t('course.back') }}
+          {{ course?.name ?? $t(`${kind}.back`) }}
        </RouterLink>
      </Button>
--- a/frontend/src/views/PomodoroView.vue
+++ b/frontend/src/views/PomodoroView.vue
@ -1,7 +1,461 @@
 <script setup lang="ts">
-import PagePlaceholder from '@/components/PagePlaceholder.vue'
+/**
 * Reverse pomodoro: a timer counting up the focus on a task, with the time of day, in a
 * quiet page. A ring fills up every 25 minutes and suggests a break, a fifth of the
 * focus time. The notes and slides of the course open next to the clock.
 *
 * `?task=<id>` starts a session on the task (see `services/focus.ts`).
 */
 import { computed, onBeforeUnmount, ref, useTemplateRef, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { useRoute, useRouter } from 'vue-router'
 import { onKeyStroke, useFullscreen } from '@vueuse/core'
 import { toast } from 'vue-sonner'
 import {
  ExternalLink,
  FileText,
  FolderOpen,
  Loader2,
  Maximize,
  Minimize,
  Pause,
  Play,
  Square,
  Timer,
  X,
 } from '@lucide/vue'
 import TagBadge from '@/components/course/TagBadge.vue'
 import { Button } from '@/components/ui/button'
 import { Skeleton } from '@/components/ui/skeleton'
 import { lectureNotePdfUrl, useCourseFiles } from '@/services/api/course-files'
 import { useTags } from '@/services/api/tags'
 import { useRefreshTasks, useTodoTasks } from '@/services/api/tasks'
 import { CYCLE_SECONDS, formatDuration, formatSpent, useFocus } from '@/services/focus'
 import { formatRelative } from '@/utils/dates'
 import { coursePageRoute, tasksTab } from '@/utils/routes'
 import type { CourseFile } from '@/utils/types'
 const { t, locale } = useI18n()
 const route = useRoute()
 const router = useRouter()
 const { tagsById } = useTags()
 const refreshTasks = useRefreshTasks()
 const focus = useFocus()
 const { session, elapsed, pauseElapsed, isRunning, pending, now } = focus
 const task = computed(() => session.value?.task ?? null)
 /** Shows the errors of an action: TimeTagger ones as a warning, the session runs anyway */
 async function run(action: () => Promise<string | null>) {
  const courseId = task.value?.course.id
  try {
    const timetaggerError = await action()
    if (timetaggerError) {
      toast.warning(t('focus.timetagger-error'), { description: timetaggerError })
    }
  } catch (err) {
    toast.error(t('focus.error'), { description: err instanceof Error ? err.message : undefined })
  } finally {
    if (courseId !== undefined) refreshTasks(courseId)
  }
 }
 // `?task=<id>`: starts working on the task, then leaves the url clean so a reload does
 // not start it again
 watch(
  () => route.query.task,
  async (value) => {
    const taskId = Number(value)
    if (!value || !Number.isInteger(taskId)) return
    await router.replace({ query: {} })
    if (task.value?.task_id === taskId) {
      if (!isRunning.value) await run(focus.resume)
      return
    }
    await run(() => focus.start(taskId))
  },
  { immediate: true },
 )
 function togglePause() {
  if (pending.value || !session.value) return
  run(isRunning.value ? focus.pause : focus.resume)
 }
 async function stop() {
  const seconds = elapsed.value
  const name = task.value?.name
  await run(focus.stop)
  if (!session.value) {
    toast.success(t('focus.stopped', { time: formatSpent(seconds) }), { description: name })
  }
  openedFile.value = undefined
 }
 onKeyStroke(' ', (event) => {
  const target = event.target as HTMLElement
  if (target.closest('input, textarea, button, a, [contenteditable]')) return
  event.preventDefault()
  togglePause()
 })
 // The ring fills up once per cycle: a break is suggested each time it is full
 const cycles = computed(() => Math.floor(elapsed.value / CYCLE_SECONDS))
 const cycleProgress = computed(() => (elapsed.value % CYCLE_SECONDS) / CYCLE_SECONDS)
 const suggestedBreak = computed(() => Math.max(5 * 60, Math.round(elapsed.value / 5)))
 watch(cycles, (count, previous) => {
  if (isRunning.value && previous !== undefined && count > previous) {
    toast(t('focus.cycle-done', { n: count }), { description: t('focus.cycle-hint') })
  }
 })
 const RADIUS = 46
 const CIRCUMFERENCE = 2 * Math.PI * RADIUS
 const clock = computed(() =>
  new Intl.DateTimeFormat(locale.value, { hour: '2-digit', minute: '2-digit' }).format(now.value),
 )
 const today = computed(() =>
  new Intl.DateTimeFormat(locale.value, { weekday: 'long', day: 'numeric', month: 'long' }).format(
    now.value,
  ),
 )
 /** Time spent on the task, this session included */
 const totalSpent = computed(() => (session.value?.spentBefore ?? 0) + elapsed.value)
 // The time in the tab title, visible from the other tabs
 const originalTitle = document.title
 watch(
  [elapsed, isRunning, session],
  () => {
    document.title = session.value
      ? `${isRunning.value ? '⏱' : '⏸'} ${formatDuration(elapsed.value)} · ${originalTitle}`
      : originalTitle
  },
  { immediate: true },
 )
 onBeforeUnmount(() => (document.title = originalTitle))
 const container = useTemplateRef<HTMLElement>('container')
 const { isFullscreen, toggle: toggleFullscreen } = useFullscreen(container)
 // Resources of the course: its notes (and soon its slides), opened next to the clock
 const showResources = ref(true)
 const { data: files, isPending: filesPending } = useCourseFiles(() => task.value?.course.id)
 const openedFile = ref<CourseFile>()
 function canOpen(file: CourseFile) {
  return file.kind === 'note' && file.has_pdf
 }
 // The small clock is next to the resources: no resource without them
 watch([() => task.value?.course.id, showResources], () => (openedFile.value = undefined))
 // Nothing running: pick a task
 const { data: todos, isPending: todosPending } = useTodoTasks()
 const choices = computed(() =>
  (todos.value ?? []).flatMap(({ course, task }) => [
    { course, task, parent: undefined as string | undefined },
    ...task.subtasks
      .filter((subtask) => !subtask.done)
      .map((subtask) => ({ course, task: subtask, parent: task.name })),
  ]),
 )
 </script>
 <template>
-  <PagePlaceholder title="nav.pomodoro" />
+  <div
    ref="container"
    class="relative -m-4 flex min-h-[calc(100svh-3.5rem)] flex-col bg-gradient-to-b from-muted/40 to-background md:-m-6"
  >
    <!-- Top bar: quiet, out of the way -->
    <div class="flex items-center gap-2 px-4 pt-4 md:px-6">
      <span class="text-sm text-muted-foreground first-letter:uppercase">{{ today }}</span>
      <div class="ml-auto flex gap-1">
        <Button
          v-if="task"
          variant="ghost"
          size="sm"
          :class="{ 'bg-accent': showResources }"
          :aria-pressed="showResources"
          @click="showResources = !showResources"
        >
          <FolderOpen />
          <span class="hidden sm:inline">{{ $t('focus.resources') }}</span>
        </Button>
        <Button
          variant="ghost"
          size="icon-sm"
          :title="isFullscreen ? $t('focus.exit-fullscreen') : $t('focus.fullscreen')"
          @click="toggleFullscreen()"
        >
          <Minimize v-if="isFullscreen" />
          <Maximize v-else />
          <span class="sr-only">{{ $t('focus.fullscreen') }}</span>
        </Button>
      </div>
    </div>
    <div
      class="grid flex-1 gap-4 p-4 md:p-6"
      :class="{ 'lg:grid-cols-[minmax(0,1fr)_20rem]': task && showResources }"
    >
      <!-- A resource opened: it takes the room, the clock moves to the side -->
      <div v-if="openedFile" class="flex min-h-[70svh] flex-col gap-2">
        <div class="flex items-center gap-2">
          <FileText class="size-4 shrink-0 text-muted-foreground" />
          <span class="truncate text-sm font-medium">{{ openedFile.name }}</span>
          <Button variant="ghost" size="icon-sm" class="ml-auto" as-child>
            <a
              :href="lectureNotePdfUrl(openedFile)"
              target="_blank"
              rel="noopener noreferrer"
              :title="$t('focus.open-tab')"
            >
              <ExternalLink />
              <span class="sr-only">{{ $t('focus.open-tab') }}</span>
            </a>
          </Button>
          <Button
            variant="ghost"
            size="icon-sm"
            :title="$t('focus.close-resource')"
            @click="openedFile = undefined"
          >
            <X />
            <span class="sr-only">{{ $t('focus.close-resource') }}</span>
          </Button>
        </div>
        <iframe
          :src="lectureNotePdfUrl(openedFile)"
          :title="openedFile.name"
          class="w-full flex-1 rounded-lg border bg-muted"
        />
      </div>
      <!-- The clock -->
      <div v-show="!openedFile" class="flex flex-col items-center justify-center gap-6 text-center">
        <template v-if="session">
          <div class="flex max-w-xl flex-col items-center gap-2">
            <template v-if="task">
              <RouterLink
                :to="coursePageRoute(task.course, tasksTab(task.course.kind))"
                class="text-sm text-muted-foreground hover:underline"
              >
                <span v-if="task.course.code" class="font-mono">{{ task.course.code }} · </span>
                {{ task.course.name }}
              </RouterLink>
              <h2 class="text-2xl font-semibold text-balance md:text-3xl">
                <span v-if="task.parent_name" class="text-muted-foreground">
                  {{ task.parent_name }} ›
                </span>
                {{ task.name }}
              </h2>
              <div class="flex flex-wrap justify-center gap-1">
                <template v-for="tagId in task.tag_ids" :key="tagId">
                  <TagBadge v-if="tagsById.get(tagId)" :tag="tagsById.get(tagId)!" />
                </template>
              </div>
            </template>
            <h2 v-else class="text-2xl font-semibold md:text-3xl">{{ $t('focus.free') }}</h2>
          </div>
          <!-- Ring of the current cycle, the focus time inside -->
          <div class="relative size-72 sm:size-96">
            <svg viewBox="0 0 100 100" class="size-full -rotate-90" aria-hidden="true">
              <circle
                cx="50"
                cy="50"
                :r="RADIUS"
                fill="none"
                class="stroke-muted"
                stroke-width="2"
              />
              <circle
                cx="50"
                cy="50"
                :r="RADIUS"
                fill="none"
                stroke-width="2.5"
                stroke-linecap="round"
                class="transition-[stroke-dashoffset] duration-1000 ease-linear"
                :class="isRunning ? 'stroke-primary' : 'stroke-muted-foreground/40'"
                :stroke-dasharray="CIRCUMFERENCE"
                :stroke-dashoffset="CIRCUMFERENCE * (1 - cycleProgress)"
              />
            </svg>
            <div class="absolute inset-0 flex flex-col items-center justify-center gap-2">
              <span
                class="font-mono text-6xl font-light tracking-tight tabular-nums sm:text-7xl"
                :class="{ 'text-muted-foreground': !isRunning }"
                role="timer"
                :aria-label="$t('focus.elapsed')"
              >
                {{ formatDuration(elapsed) }}
              </span>
              <span class="text-lg text-muted-foreground tabular-nums">{{ clock }}</span>
              <span
                v-if="cycles"
                class="flex items-center gap-1"
                :title="$t('focus.cycles', { n: cycles })"
              >
                <span
                  v-for="i in Math.min(cycles, 8)"
                  :key="i"
                  class="size-2 rounded-full bg-primary/70"
                />
                <span v-if="cycles > 8" class="text-xs text-muted-foreground"
                  >+{{ cycles - 8 }}</span
                >
              </span>
            </div>
          </div>
          <p v-if="!isRunning" class="text-sm text-muted-foreground">
            {{ $t('focus.paused', { time: formatDuration(pauseElapsed) }) }}
            · {{ $t('focus.suggested-break', { time: formatSpent(suggestedBreak) }) }}
          </p>
          <div class="flex items-center gap-3">
            <Button
              size="lg"
              class="h-14 min-w-40 rounded-full text-base"
              :disabled="pending"
              @click="togglePause"
            >
              <Loader2 v-if="pending" class="animate-spin" />
              <Pause v-else-if="isRunning" />
              <Play v-else />
              {{ isRunning ? $t('focus.pause') : $t('focus.resume') }}
            </Button>
            <Button
              size="lg"
              variant="outline"
              class="h-14 rounded-full"
              :disabled="pending"
              @click="stop"
            >
              <Square />
              {{ $t('focus.stop') }}
            </Button>
          </div>
          <p class="flex flex-wrap justify-center gap-x-3 text-xs text-muted-foreground">
            <span v-if="task">{{ $t('focus.total', { time: formatSpent(totalSpent) }) }}</span>
            <span v-if="task?.timetagger_enabled" class="flex items-center gap-1">
              <span
                class="size-1.5 rounded-full"
                :class="session.record ? 'bg-green-500' : 'bg-muted-foreground/50'"
              />
              TimeTagger
            </span>
            <span class="hidden md:inline">{{ $t('focus.space-hint') }}</span>
          </p>
        </template>
        <!-- Nothing running -->
        <template v-else>
          <div class="flex flex-col items-center gap-1">
            <span class="font-mono text-7xl font-light tracking-tight tabular-nums sm:text-8xl">
              {{ clock }}
            </span>
            <p class="text-muted-foreground">{{ $t('focus.pick') }}</p>
          </div>
          <div class="flex w-full max-w-lg flex-col gap-2 text-left">
            <div v-if="todosPending" class="flex flex-col gap-2">
              <Skeleton v-for="i in 3" :key="i" class="h-12 rounded-lg" />
            </div>
            <ul v-else class="flex max-h-[45svh] flex-col gap-1.5 overflow-y-auto">
              <li v-for="choice in choices" :key="choice.task.id">
                <button
                  type="button"
                  class="flex w-full items-center gap-3 rounded-lg border bg-card px-3 py-2 text-left transition-colors hover:bg-accent disabled:opacity-60"
                  :disabled="pending"
                  @click="run(() => focus.start(choice.task.id))"
                >
                  <Timer class="size-4 shrink-0 text-muted-foreground" />
                  <span class="flex min-w-0 flex-1 flex-col">
                    <span class="truncate text-sm font-medium">
                      <span v-if="choice.parent" class="text-muted-foreground">
                        {{ choice.parent }} ›
                      </span>
                      {{ choice.task.name }}
                    </span>
                    <span class="truncate text-xs text-muted-foreground">
                      <span class="font-mono">{{ choice.course.code ?? choice.course.name }}</span>
                      <template v-if="choice.task.deadline">
                        · {{ formatRelative(choice.task.deadline, locale) }}
                      </template>
                    </span>
                  </span>
                </button>
              </li>
              <li v-if="!choices.length" class="py-2 text-center text-sm text-muted-foreground">
                {{ $t('focus.no-task') }}
              </li>
            </ul>
            <Button variant="outline" :disabled="pending" @click="run(() => focus.start(null))">
              <Play />
              {{ $t('focus.start-free') }}
            </Button>
          </div>
        </template>
      </div>
      <!-- Side: the clock when a resource is opened, and the resources -->
      <aside v-if="task && showResources" class="flex min-w-0 flex-col gap-4">
        <div v-if="openedFile" class="flex items-center gap-3 rounded-xl border bg-card p-3">
          <span
            class="font-mono text-3xl font-light tabular-nums"
            :class="{ 'text-muted-foreground': !isRunning }"
          >
            {{ formatDuration(elapsed) }}
          </span>
          <span class="text-sm text-muted-foreground tabular-nums">{{ clock }}</span>
          <Button
            size="icon"
            variant="secondary"
            class="ml-auto rounded-full"
            :disabled="pending"
            :title="isRunning ? $t('focus.pause') : $t('focus.resume')"
            @click="togglePause"
          >
            <Pause v-if="isRunning" />
            <Play v-else />
          </Button>
        </div>
        <div class="flex flex-col gap-2 rounded-xl border bg-card p-3">
          <h3 class="text-sm font-medium">{{ $t('focus.resources') }}</h3>
          <div v-if="filesPending" class="flex flex-col gap-2">
            <Skeleton v-for="i in 3" :key="i" class="h-9" />
          </div>
          <p v-else-if="!files?.length" class="text-sm text-muted-foreground">
            {{ $t('focus.no-resource') }}
          </p>
          <ul v-else class="-mx-1 flex flex-col">
            <li v-for="file in files" :key="file.id">
              <button
                type="button"
                class="flex w-full items-center gap-2 rounded-md px-2 py-1.5 text-left text-sm transition-colors hover:bg-accent disabled:cursor-not-allowed disabled:opacity-50"
                :class="{ 'bg-accent font-medium': openedFile?.id === file.id }"
                :disabled="!canOpen(file)"
                @click="openedFile = file"
              >
                <FileText class="size-4 shrink-0 text-muted-foreground" />
                <span class="min-w-0 flex-1 truncate">{{ file.name }}</span>
                <template v-for="tagId in file.tag_ids" :key="tagId">
                  <TagBadge v-if="tagsById.get(tagId)" :tag="tagsById.get(tagId)!" />
                </template>
              </button>
            </li>
          </ul>
        </div>
      </aside>
    </div>
  </div>
 </template>
--- a/src/api/helpers.rs
+++ b/src/api/helpers.rs
@ -21,6 +21,7 @@ pub fn error_response<T>(fn_name: &str, err: ControllerError) -> Result<T, (Stat
        ControllerError::Grade(err) => Some(err.to_string()),
        ControllerError::Task(err) => Some(err.to_string()),
        ControllerError::LectureNote(err) => Some(err.to_string()),
        ControllerError::Focus(err) => Some(err.to_string()),
        _ => None,
    };
    match (invalid, err) {
--- a/src/api/models.rs
+++ b/src/api/models.rs
@ -6,8 +6,9 @@ use schemars::JsonSchema;
 use serde::Deserialize;
 use crate::core::models::{
-    course::{CourseData, CourseId},
+    course::{CourseData, CourseId, CourseKind},
    course_file::CourseFileId,
    focus::TimetaggerRecord,
    grade::{GradeData, GradeId},
    tag::TagId,
    task::{TaskData, TaskId},
@ -48,12 +49,15 @@ pub struct PeriodQuery {
    pub to: DateTime<Utc>,
 }
-/// A course, without its slots: they are added and removed one by one
+/// A course or an association, without its slots: they are added and removed one by one
 #[derive(Deserialize, JsonSchema)]
 pub struct CourseBody {
    /// `course` by default. Cannot be changed once created.
    pub kind: Option<CourseKind>,
    pub name: String,
    pub code: Option<String>,
-    /// At least one
+    /// At least one for a course
    #[serde(default)]
    pub teachers: Vec<String>,
    /// http(s) url of the main page of the course
    pub main_page_url: Option<String>,
@ -104,6 +108,15 @@ pub struct CreateTaskBody {
    pub task: TaskBody,
 }
 /// End (or pause) of a focus session
 #[derive(Deserialize, JsonSchema)]
 pub struct FocusStopBody {
    /// Length of the session, at most 24 hours
    pub seconds: u32,
    /// Record returned when the session started, to stop it
    pub timetagger: Option<TimetaggerRecord>,
 }
 #[derive(Deserialize, JsonSchema)]
 pub struct LectureNoteBody {
    /// Subtitle of the pdf, e.g. "Lecture 2 Notes: Memory subsystem"
@ -115,6 +128,7 @@ pub struct LectureNoteBody {
 impl From<CourseBody> for CourseData {
    fn from(value: CourseBody) -> Self {
        CourseData {
            kind: value.kind.unwrap_or(CourseKind::Course),
            name: value.name,
            code: value.code,
            teachers: value.teachers,
--- a/src/api/tasks.rs
+++ b/src/api/tasks.rs
@ -1,10 +1,12 @@
 //! Tasks of a course. Every change returns all the tasks of the course, nested and
 //! sorted, with the deadlines: the page never needs a second request.
 //!
 //! The focus sessions of the pomodoro are counted on the tasks, and in TimeTagger.
 use aide::{
    axum::{
        ApiRouter,
-        routing::{get_with, put_with},
+        routing::{get_with, post_with, put_with},
    },
    transform::TransformOperation,
 };
@ -17,11 +19,14 @@ use axum::{
 use crate::{
    api::{
        helpers::{desc, error_response},
-        models::{CoursePath, CreateTaskBody, PeriodQuery, TaskBody, TaskPath},
+        models::{CoursePath, CreateTaskBody, FocusStopBody, PeriodQuery, TaskBody, TaskPath},
    },
    core::{
        controller::AppController,
-        models::task::{CalendarTask, CourseTasks},
+        models::{
            focus::{FocusStart, FocusStop},
            task::{CalendarTask, CourseTasks, TodoTask},
        },
    },
 };
@ -31,6 +36,10 @@ pub fn routes() -> ApiRouter {
            "/api/tasks",
            get_with(get_calendar_tasks, get_calendar_tasks_docs),
        )
        .api_route(
            "/api/tasks/todo",
            get_with(get_todo_tasks, get_todo_tasks_docs),
        )
        .api_route(
            "/api/courses/{id}/tasks",
            get_with(get_course_tasks, get_course_tasks_docs)
@ -40,6 +49,68 @@ pub fn routes() -> ApiRouter {
            "/api/tasks/{id}",
            put_with(update_task, update_task_docs).delete_with(delete_task, delete_task_docs),
        )
        .api_route(
            "/api/tasks/{id}/focus",
            post_with(start_focus, start_focus_docs),
        )
        .api_route(
            "/api/tasks/{id}/focus/stop",
            post_with(stop_focus, stop_focus_docs),
        )
 }
 async fn get_todo_tasks(
    controller: AppController,
 ) -> Result<Json<Vec<TodoTask>>, (StatusCode, String)> {
    match controller.get_todo_tasks().await {
        Ok(tasks) => Ok(Json(tasks)),
        Err(err) => error_response("get_todo_tasks", err),
    }
 }
 fn get_todo_tasks_docs(op: TransformOperation) -> TransformOperation {
    op.tag("Tasks").summary(
        "Get the tasks not done of every course and association, with their subtasks, \
         the closest deadline first",
    )
 }
 async fn start_focus(
    controller: AppController,
    Path(path): Path<TaskPath>,
 ) -> Result<Json<FocusStart>, (StatusCode, String)> {
    match controller.start_focus(path.id).await {
        Ok(focus) => Ok(Json(focus)),
        Err(err) => error_response("start_focus", err),
    }
 }
 fn start_focus_docs(op: TransformOperation) -> TransformOperation {
    op.tag("Tasks")
        .summary("Start a focus session on a task, and its TimeTagger record")
        .description("The session starts even when TimeTagger fails: see `timetagger_error`.")
        .response_with::<404, String, _>(desc("The task does not exist"))
 }
 async fn stop_focus(
    controller: AppController,
    Path(path): Path<TaskPath>,
    Json(body): Json<FocusStopBody>,
 ) -> Result<Json<FocusStop>, (StatusCode, String)> {
    match controller
        .stop_focus(path.id, body.seconds, body.timetagger)
        .await
    {
        Ok(focus) => Ok(Json(focus)),
        Err(err) => error_response("stop_focus", err),
    }
 }
 fn stop_focus_docs(op: TransformOperation) -> TransformOperation {
    op.tag("Tasks")
        .summary("End or pause a focus session: its time is added to the task")
        .response_with::<400, String, _>(desc("The session is too long"))
        .response_with::<404, String, _>(desc("The task does not exist"))
 }
 async fn get_calendar_tasks(
--- a/src/core/controller/course_files.rs
+++ b/src/core/controller/course_files.rs
@ -1,16 +1,17 @@
 //! Files of a course. For now only the lecture notes: markdown written in the app,
 //! rendered to pdf with the course template, and tagged `notes`.
 //!
-//! Both files of a note live in the storage, next to the other files of the course:
+//! Both files of a note live in the folder of the course, named after the note:
-//! `courses/{course}/notes/{note}.md` and `.pdf`. The `.md` holds the front matter
+//! `Cours/CS-477 Advanced OS/Notes/Lecture 1 Notes - Intro.md` and `.pdf`. They are
-//! expected by the template, so it can also be rendered by hand with `mdpdf`. The
+//! moved when the note is renamed. The `.md` holds the front matter expected by the
-//! editor only sees what comes after it.
+//! template, so it can also be rendered by hand with `mdpdf`. The editor only sees what
 //! comes after it.
 use thiserror::Error;
 use tracing::error;
 use crate::core::{
-    controller::{ControllerError, courses::course_dir},
+    controller::{ControllerError, courses::file_name},
    models::{
        course::{Course, CourseId},
        course_file::{CourseFile, CourseFileId, FileKind, LectureNoteContent, SavedLectureNote},
@ -28,12 +29,20 @@ pub struct NotesSettings {
    pub logo: Option<String>,
 }
-fn markdown_path(note: &CourseFile) -> String {
+/// Sub folder of the course holding the notes
-    format!("{}/notes/{}.md", course_dir(note.course_id), note.id)
+const NOTES_FOLDER: &str = "Notes";
 fn markdown_path(course: &Course, path: &str) -> String {
    format!("{}/{path}.md", course.folder)
 }
-fn pdf_path(note: &CourseFile) -> String {
+fn pdf_path(course: &Course, path: &str) -> String {
-    format!("{}/notes/{}.pdf", course_dir(note.course_id), note.id)
+    format!("{}/{path}.pdf", course.folder)
 }
 /// Path of a note in the folder of its course, without extension
 fn note_path(title: &str) -> String {
    format!("{NOTES_FOLDER}/{}", file_name(title))
 }
 impl super::AppController {
@ -63,7 +72,12 @@ impl super::AppController {
        id: CourseFileId,
    ) -> Result<LectureNoteContent, ControllerError> {
        let note = self.get_note(id).await?;
-        let content = match self.storage.read_file(&markdown_path(&note)).await {
+        let course = self.db.get_course(note.course_id).await?;
        let content = match self
            .storage
            .read_file(&markdown_path(&course, &note.path))
            .await
        {
            Ok(bytes) => String::from_utf8_lossy(&bytes).into_owned(),
            // Lost file: the note can still be rewritten
            Err(RepositoryError::NotFound(_)) => String::new(),
@ -78,8 +92,9 @@ impl super::AppController {
    /// `NotFound` if the note does not exist or its last rendering failed
    pub async fn get_lecture_note_pdf(&self, id: CourseFileId) -> Result<Vec<u8>, ControllerError> {
        let note = self.get_note(id).await?;
        let course = self.db.get_course(note.course_id).await?;
        self.storage
-            .read_file(&pdf_path(&note))
+            .read_file(&pdf_path(&course, &note.path))
            .await
            .map_err(Into::into)
    }
@ -92,10 +107,12 @@ impl super::AppController {
    ) -> Result<SavedLectureNote, ControllerError> {
        let title = validate_title(title)?;
        let course = self.db.get_course(course_id).await?;
        let path = note_path(&title);
        self.check_path_free(course_id, &path, None).await?;
        let notes_tag = self.db.get_tag_id(NOTES_TAG).await?;
        let note = self
            .db
-            .create_lecture_note(course_id, title.clone(), &[notes_tag])
+            .create_lecture_note(course_id, title.clone(), path, &[notes_tag])
            .await?;
        self.save_lecture_note(&course, note, title, content).await
    }
@ -109,14 +126,55 @@ impl super::AppController {
        let title = validate_title(title)?;
        let note = self.get_note(id).await?;
        let course = self.db.get_course(note.course_id).await?;
        // Renamed: its files follow
        let path = note_path(&title);
        if path != note.path {
            self.check_path_free(course.id, &path, Some(id)).await?;
            for (from, to) in [
                (
                    markdown_path(&course, &note.path),
                    markdown_path(&course, &path),
                ),
                (pdf_path(&course, &note.path), pdf_path(&course, &path)),
            ] {
                match self.storage.rename(&from, &to).await {
                    Ok(()) | Err(RepositoryError::NotFound(_)) => {}
                    Err(err) => return Err(err.into()),
                }
            }
        }
        let note = CourseFile { path, ..note };
        self.save_lecture_note(&course, note, title, content).await
    }
    pub async fn delete_lecture_note(&self, id: CourseFileId) -> Result<(), ControllerError> {
        let note = self.get_note(id).await?;
        let course = self.db.get_course(note.course_id).await?;
        self.db.delete_course_file(id).await?;
-        self.storage.delete_file(&markdown_path(&note)).await?;
+        self.storage
-        self.storage.delete_file(&pdf_path(&note)).await?;
+            .delete_file(&markdown_path(&course, &note.path))
            .await?;
        self.storage
            .delete_file(&pdf_path(&course, &note.path))
            .await?;
        Ok(())
    }
    /// `NameTaken` if another file of the course (than `except`) already has this path
    async fn check_path_free(
        &self,
        course_id: CourseId,
        path: &str,
        except: Option<CourseFileId>,
    ) -> Result<(), ControllerError> {
        let files = self.db.get_course_files(course_id).await?;
        if files
            .iter()
            .any(|file| file.path == path && Some(file.id) != except)
        {
            return Err(LectureNotesControllerError::NameTaken.into());
        }
        Ok(())
    }
@ -130,18 +188,19 @@ impl super::AppController {
        content: String,
    ) -> Result<SavedLectureNote, ControllerError> {
        let markdown = format!("{}{}", self.front_matter(course, &title), content);
        let pdf = pdf_path(course, &note.path);
        self.storage
-            .write_file(&markdown_path(&note), markdown.as_bytes())
+            .write_file(&markdown_path(course, &note.path), markdown.as_bytes())
            .await?;
        let pdf_error = match self.renderer.render(&markdown).await {
-            Ok(pdf) => {
+            Ok(content) => {
-                self.storage.write_file(&pdf_path(&note), &pdf).await?;
+                self.storage.write_file(&pdf, &content).await?;
                None
            }
            Err(err) => {
                // No stale pdf that would not match the markdown anymore
-                self.storage.delete_file(&pdf_path(&note)).await?;
+                self.storage.delete_file(&pdf).await?;
                Some(match err {
                    RenderError::Failed(log) => log,
                    RenderError::Internal(message) => {
@ -154,7 +213,7 @@ impl super::AppController {
        let note = self
            .db
-            .update_lecture_note(note.id, title, pdf_error.is_none())
+            .update_lecture_note(note.id, title, note.path, pdf_error.is_none())
            .await?;
        Ok(SavedLectureNote { note, pdf_error })
    }
@ -209,6 +268,8 @@ fn validate_title(title: String) -> Result<String, ControllerError> {
 pub enum LectureNotesControllerError {
    #[error("The title of the note is empty")]
    EmptyTitle,
    #[error("Another file of the course already has this name")]
    NameTaken,
 }
 #[cfg(test)]
--- a/src/core/controller/courses.rs
+++ b/src/core/controller/courses.rs
@ -1,15 +1,21 @@
-//! Courses and their weekly time slots.
+//! Courses and associations, and their weekly time slots.
 //!
 //! Each one has a folder in the storage named after it, where its files live:
 //! `Cours/CS-477 Advanced operating systems`, `Associations/AGEPoly`. The folder is
 //! moved when the course is renamed.
 use chrono::NaiveTime;
 use thiserror::Error;
 use tracing::error;
 use crate::core::{
    controller::{ControllerError, is_http_url, non_blank},
    models::{
-        course::{Course, CourseData, CourseId},
+        course::{Course, CourseData, CourseId, CourseKind},
        tag::{TagId, TagScope},
        time_slot::{TimeSlotData, TimeSlotId},
    },
    repositories::RepositoryError,
 };
 /// The timetable shows monday to friday...
@ -19,9 +25,43 @@ const LAST_WEEKDAY: u8 = 5;
 const DAY_START: NaiveTime = NaiveTime::from_hms_opt(8, 0, 0).unwrap();
 const DAY_END: NaiveTime = NaiveTime::from_hms_opt(19, 0, 0).unwrap();
-/// Directory of the files of a course in the storage
+/// Longest name of a file or folder in the storage, in characters
-pub(crate) fn course_dir(id: CourseId) -> String {
+const MAX_FILE_NAME: usize = 120;
-    format!("courses/{id}")
+
 /// Folder of a course in the storage, e.g. `Cours/CS-477 Advanced operating systems`
 fn course_folder(course: &CourseData) -> String {
    let root = match course.kind {
        CourseKind::Course => "Cours",
        CourseKind::Association => "Associations",
    };
    let name = match &course.code {
        Some(code) => format!("{code} {}", course.name),
        None => course.name.clone(),
    };
    format!("{root}/{}", file_name(&name))
 }
 /// A name usable as a file or folder name on any NAS (samba included): without the
 /// characters Windows forbids, e.g. "Notes: memory/cache" -> "Notes - memory-cache"
 pub(crate) fn file_name(name: &str) -> String {
    let replaced: String = name
        .replace(':', " - ")
        .chars()
        .map(|c| match c {
            '/' | '\\' | '*' | '?' | '"' | '<' | '>' | '|' => '-',
            c if c.is_control() => ' ',
            c => c,
        })
        .collect();
    let collapsed = replaced.split_whitespace().collect::<Vec<_>>().join(" ");
    let truncated: String = collapsed.chars().take(MAX_FILE_NAME).collect();
    // A trailing dot or space is dropped by windows
    let trimmed = truncated.trim_matches(|c: char| c == '.' || c == ' ');
    if trimmed.is_empty() {
        "Sans titre".to_owned()
    } else {
        trimmed.to_owned()
    }
 }
 impl super::AppController {
@ -35,22 +75,73 @@ impl super::AppController {
    pub async fn create_course(&self, course: CourseData) -> Result<Course, ControllerError> {
        let course = validate_course(course)?;
-        self.db.create_course(course).await.map_err(Into::into)
+        let folder = course_folder(&course);
        self.check_folder_free(&folder, None).await?;
        self.db
            .create_course(course, &folder)
            .await
            .map_err(Into::into)
    }
    /// Replaces a course, keeping its kind. Its folder follows its new name.
    pub async fn update_course(
        &self,
        id: CourseId,
        course: CourseData,
    ) -> Result<Course, ControllerError> {
-        let course = validate_course(course)?;
+        let existing = self.db.get_course(id).await?;
-        self.db.update_course(id, course).await.map_err(Into::into)
+        let course = validate_course(CourseData {
            kind: existing.kind,
            ..course
        })?;
        let folder = course_folder(&course);
        if folder == existing.folder {
            return self
                .db
                .update_course(id, course, &folder)
                .await
                .map_err(Into::into);
        }
        self.check_folder_free(&folder, Some(id)).await?;
        let moved = match self.storage.rename(&existing.folder, &folder).await {
            Ok(()) => true,
            // No file yet
            Err(RepositoryError::NotFound(_)) => false,
            Err(err) => return Err(err.into()),
        };
        match self.db.update_course(id, course, &folder).await {
            Ok(course) => Ok(course),
            Err(err) => {
                if moved && let Err(err) = self.storage.rename(&folder, &existing.folder).await {
                    error!("Unable to move {folder} back to {}: {err}", existing.folder);
                }
                Err(err.into())
            }
        }
    }
    /// Deletes the course with everything attached to it, its files included
    pub async fn delete_course(&self, id: CourseId) -> Result<(), ControllerError> {
        let course = self.db.get_course(id).await?;
        self.db.delete_course(id).await?;
-        self.storage.delete_dir(&course_dir(id)).await?;
+        self.storage.delete_dir(&course.folder).await?;
        Ok(())
    }
    /// `FolderTaken` if another course (than `except`) already has this folder
    async fn check_folder_free(
        &self,
        folder: &str,
        except: Option<CourseId>,
    ) -> Result<(), ControllerError> {
        let courses = self.db.get_courses().await?;
        if courses
            .iter()
            .any(|course| course.folder == folder && Some(course.id) != except)
        {
            return Err(CoursesControllerError::FolderTaken(folder.to_owned()).into());
        }
        Ok(())
    }
@ -98,7 +189,7 @@ fn validate_course(course: CourseData) -> Result<CourseData, ControllerError> {
        .map(|teacher| teacher.trim().to_owned())
        .filter(|teacher| !teacher.is_empty())
        .collect();
-    if teachers.is_empty() {
+    if teachers.is_empty() && course.kind == CourseKind::Course {
        return Err(CoursesControllerError::NoTeacher.into());
    }
@ -111,6 +202,7 @@ fn validate_course(course: CourseData) -> Result<CourseData, ControllerError> {
    }
    Ok(CourseData {
        kind: course.kind,
        name,
        code: non_blank(course.code),
        teachers,
@ -133,4 +225,39 @@ pub enum CoursesControllerError {
    InvalidSlotTime,
    #[error("Unknown tag {0}")]
    UnknownTag(TagId),
    #[error("Another course or association already uses the folder {0}")]
    FolderTaken(String),
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    #[test]
    fn file_names_are_safe() {
        assert_eq!(
            file_name("Lecture 2 Notes: Memory/cache"),
            "Lecture 2 Notes - Memory-cache"
        );
        assert_eq!(file_name("  a  *b?.  "), "a -b-");
        assert_eq!(file_name("..."), "Sans titre");
    }
    #[test]
    fn folder_of_a_course() {
        let course = CourseData {
            kind: CourseKind::Course,
            name: "Advanced OS".to_owned(),
            code: Some("CS-477".to_owned()),
            teachers: Vec::new(),
            main_page_url: None,
        };
        assert_eq!(course_folder(&course), "Cours/CS-477 Advanced OS");
        let association = CourseData {
            kind: CourseKind::Association,
            code: None,
            ..course
        };
        assert_eq!(course_folder(&association), "Associations/Advanced OS");
    }
 }
--- a/src/core/controller/focus.rs
+++ b/src/core/controller/focus.rs
@ -0,0 +1,183 @@
 //! Focus sessions of the pomodoro. The pomodoro counts up: a session runs from its start
 //! until it is paused or stopped. Its time is added to the task, and counted in
 //! TimeTagger when it is configured, tagged with the course, the tags and the name of the
 //! task (`#cs-477 #homework #exercise-set-3`).
 //!
 //! TimeTagger never blocks a session: when it fails, the error is returned next to the
 //! result, to be shown.
 use chrono::Utc;
 use thiserror::Error;
 use tracing::warn;
 use crate::core::{
    controller::ControllerError,
    models::{
        focus::{FocusStart, FocusStop, TimetaggerRecord},
        tag::Tag,
        task::{Task, TaskId},
    },
 };
 /// Longest session that can be added at once
 const MAX_SESSION_SECONDS: u32 = 24 * 3600;
 impl super::AppController {
    /// Starts a session on a task or a subtask
    pub async fn start_focus(&self, task_id: TaskId) -> Result<FocusStart, ControllerError> {
        let task = self.db.get_task(task_id).await?;
        let parent = match task.parent_id {
            Some(parent_id) => Some(self.db.get_task(parent_id).await?),
            None => None,
        };
        let course = self.db.get_course(task.course_id).await?;
        let tag_ids = match &parent {
            Some(parent) if task.tag_ids.is_empty() => parent.tag_ids.clone(),
            _ => task.tag_ids.clone(),
        };
        let tags: Vec<Tag> = self
            .db
            .get_tags(None)
            .await?
            .into_iter()
            .filter(|tag| tag_ids.contains(&tag.id))
            .collect();
        let started_at = Utc::now();
        let (timetagger, timetagger_error) = match &self.time_tracker {
            None => (None, None),
            Some(tracker) => {
                let course_tag = course.code.as_deref().unwrap_or(&course.name);
                let description = description(course_tag, &tags, parent.as_ref(), &task);
                match tracker.start(&description, started_at).await {
                    Ok(record) => (Some(record), None),
                    Err(err) => {
                        warn!("Unable to start a TimeTagger record: {err}");
                        (None, Some(err.to_string()))
                    }
                }
            }
        };
        Ok(FocusStart {
            course: (&course).into(),
            task_id: task.id,
            name: task.name,
            parent_name: parent.map(|parent| parent.name),
            tag_ids,
            time_spent: task.time_spent,
            started_at,
            timetagger_enabled: self.time_tracker.is_some(),
            timetagger,
            timetagger_error,
        })
    }
    /// Ends a session (or pauses it: resuming starts a new one): adds its `seconds` to
    /// the task and stops its TimeTagger record
    pub async fn stop_focus(
        &self,
        task_id: TaskId,
        seconds: u32,
        record: Option<TimetaggerRecord>,
    ) -> Result<FocusStop, ControllerError> {
        if seconds > MAX_SESSION_SECONDS {
            return Err(FocusControllerError::TooLong.into());
        }
        let time_spent = self.db.add_time_spent(task_id, seconds as i32).await?;
        let timetagger_error = match (&self.time_tracker, record) {
            (Some(tracker), Some(record)) => match tracker.stop(&record, Utc::now()).await {
                Ok(()) => None,
                Err(err) => {
                    warn!("Unable to stop the TimeTagger record {}: {err}", record.key);
                    Some(err.to_string())
                }
            },
            _ => None,
        };
        Ok(FocusStop {
            time_spent,
            timetagger_error,
        })
    }
 }
 /// `#cs-477 #homework #exercise-set-3`, the parent task before the subtask
 fn description(course: &str, tags: &[Tag], parent: Option<&Task>, task: &Task) -> String {
    let mut words: Vec<String> = Vec::new();
    let names = std::iter::once(course)
        .chain(
            tags.iter()
                .map(|tag| tag.slug.as_deref().unwrap_or(&tag.name.en)),
        )
        .chain(parent.map(|parent| parent.name.as_str()))
        .chain(std::iter::once(task.name.as_str()));
    for name in names {
        let word = tag_word(name);
        if !word.is_empty() && !words.contains(&word) {
            words.push(word);
        }
    }
    words
        .iter()
        .map(|word| format!("#{word}"))
        .collect::<Vec<_>>()
        .join(" ")
 }
 /// A TimeTagger tag is a single lowercase word: "Exercise set 3" -> "exercise-set-3"
 fn tag_word(name: &str) -> String {
    name.to_lowercase()
        .split(|c: char| !c.is_alphanumeric())
        .filter(|part| !part.is_empty())
        .collect::<Vec<_>>()
        .join("-")
 }
 #[derive(Error, Debug)]
 pub enum FocusControllerError {
    #[error("A session lasts at most 24 hours")]
    TooLong,
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    use crate::core::models::{localized_string::LocalizedString, tag::TagScope};
    fn task(name: &str) -> Task {
        Task {
            id: 1,
            course_id: 1,
            parent_id: None,
            name: name.to_owned(),
            description: None,
            links: Vec::new(),
            deadline: None,
            done: false,
            tag_ids: Vec::new(),
            time_spent: 0,
            subtasks: Vec::new(),
        }
    }
    #[test]
    fn describes_a_subtask() {
        let tag = Tag {
            id: 4,
            name: LocalizedString {
                fr: "Devoir".to_owned(),
                en: "Homework".to_owned(),
            },
            color: "#000".to_owned(),
            slug: Some("homework".to_owned()),
            scopes: vec![TagScope::Task],
        };
        let parent = task("Série 3");
        assert_eq!(
            description("CS-477", &[tag], Some(&parent), &task("Exercice 2 (b)")),
            "#cs-477 #homework #série-3 #exercice-2-b"
        );
    }
 }
--- a/src/core/controller/mod.rs
+++ b/src/core/controller/mod.rs
@ -13,17 +13,19 @@ use crate::core::{
    controller::{
        course_files::{LectureNotesControllerError, NotesSettings},
        courses::CoursesControllerError,
        focus::FocusControllerError,
        grades::GradesControllerError,
        tasks::TasksControllerError,
    },
    repositories::{
        DatabaseRepository, RepositoryError, pdf_renderer::PdfRenderer,
-        storage_repository::StorageRepository,
+        storage_repository::StorageRepository, time_tracker::TimeTracker,
    },
 };
 pub mod course_files;
 pub mod courses;
 pub mod focus;
 pub mod grades;
 pub mod tags;
 pub mod tasks;
@ -35,6 +37,8 @@ pub struct AppController {
    storage: Arc<dyn StorageRepository>,
    renderer: Arc<dyn PdfRenderer>,
    notes: Arc<NotesSettings>,
    /// `None` when TimeTagger is not configured
    time_tracker: Option<Arc<dyn TimeTracker>>,
 }
 impl AppController {
@ -43,12 +47,14 @@ impl AppController {
        storage: Arc<dyn StorageRepository>,
        renderer: Arc<dyn PdfRenderer>,
        notes: NotesSettings,
        time_tracker: Option<Arc<dyn TimeTracker>>,
    ) -> Self {
        Self {
            db,
            storage,
            renderer,
            notes: Arc::new(notes),
            time_tracker,
        }
    }
 }
@ -71,6 +77,8 @@ pub enum ControllerError {
    Task(#[from] TasksControllerError),
    #[error("Lecture note specific error: {0}")]
    LectureNote(#[from] LectureNotesControllerError),
    #[error("Focus specific error: {0}")]
    Focus(#[from] FocusControllerError),
 }
 /// Trims a text, `None` when it is blank
--- a/src/core/controller/tasks.rs
+++ b/src/core/controller/tasks.rs
@ -12,7 +12,7 @@ use crate::core::{
        course::Course,
        course::CourseId,
        tag::TagScope,
-        task::{CalendarTask, CourseTasks, Task, TaskData, TaskId},
+        task::{CalendarTask, CourseTasks, Task, TaskData, TaskId, TodoTask},
    },
 };
@ -35,6 +35,29 @@ impl super::AppController {
        Ok(calendar(tasks, &courses, from, to))
    }
    /// Tasks not done of every course, with their subtasks: the ones with a deadline
    /// first, the closest first
    pub async fn get_todo_tasks(&self) -> Result<Vec<TodoTask>, ControllerError> {
        let tasks = organize(self.db.get_todo_tasks().await?).tasks;
        let courses: HashMap<_, Course> = self
            .db
            .get_courses()
            .await?
            .into_iter()
            .map(|course| (course.id, course))
            .collect();
        Ok(tasks
            .into_iter()
            .filter_map(|task| {
                let course = courses.get(&task.course_id)?;
                Some(TodoTask {
                    course: course.into(),
                    task,
                })
            })
            .collect())
    }
    pub async fn get_course_tasks(
        &self,
        course_id: CourseId,
@ -189,6 +212,7 @@ fn calendar(
            Some(CalendarTask {
                task_id: task.id,
                course_id: course.id,
                course_kind: course.kind,
                course_name: course.name.clone(),
                course_code: course.code.clone(),
                name: match parent {
@ -229,6 +253,7 @@ mod tests {
    use chrono::{TimeZone, Utc};
    use super::*;
    use crate::core::models::course::CourseKind;
    fn task(id: TaskId, parent_id: Option<TaskId>, day: Option<u32>, done: bool) -> Task {
        Task {
@ -241,6 +266,7 @@ mod tests {
            deadline: day.map(|day| Utc.with_ymd_and_hms(2026, 10, day, 12, 0, 0).unwrap()),
            done,
            tag_ids: vec![1],
            time_spent: 0,
            subtasks: Vec::new(),
        }
    }
@ -264,10 +290,12 @@ mod tests {
    fn calendar_names_and_tags_subtasks_after_their_parent() {
        let course = Course {
            id: 1,
            kind: CourseKind::Course,
            name: "OS".to_owned(),
            code: None,
            teachers: Vec::new(),
            main_page_url: None,
            folder: "Cours/OS".to_owned(),
            slots: Vec::new(),
        };
        let from = Utc.with_ymd_and_hms(2026, 10, 1, 0, 0, 0).unwrap();
--- a/src/core/models/course.rs
+++ b/src/core/models/course.rs
@ -5,26 +5,68 @@ use crate::core::models::time_slot::TimeSlot;
 pub type CourseId = i32;
 /// A course, or an association: both have tasks, files and slots, only the courses have
 /// teachers and grades.
 #[derive(Debug, Clone, Serialize, Deserialize, JsonSchema)]
 pub struct Course {
    pub id: CourseId,
    pub kind: CourseKind,
    /// e.g. "Advanced operating systems"
    pub name: String,
-    /// e.g. "CS-477"
+    /// e.g. "CS-477", or the acronym of an association
    pub code: Option<String>,
-    /// At least one
+    /// At least one for a course, none for an association
    pub teachers: Vec<String>,
    /// Main page of the course, usually on moodle
    pub main_page_url: Option<String>,
    /// Folder of its files in the storage, e.g. `Cours/CS-477 Advanced operating systems`
    pub folder: String,
    /// Weekly slots, sorted by weekday then start time
    pub slots: Vec<TimeSlot>,
 }
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
 #[serde(rename_all = "lowercase")]
 pub enum CourseKind {
    Course,
    Association,
 }
 impl CourseKind {
    pub fn as_str(self) -> &'static str {
        match self {
            CourseKind::Course => "course",
            CourseKind::Association => "association",
        }
    }
 }
 /// Content of a course, used to create or replace one. The slots are managed apart.
 #[derive(Debug, Clone)]
 pub struct CourseData {
    pub kind: CourseKind,
    pub name: String,
    pub code: Option<String>,
    pub teachers: Vec<String>,
    pub main_page_url: Option<String>,
 }
 /// What a task needs to show of its course
 #[derive(Debug, Clone, Serialize, JsonSchema)]
 pub struct CourseSummary {
    pub id: CourseId,
    pub kind: CourseKind,
    pub name: String,
    pub code: Option<String>,
 }
 impl From<&Course> for CourseSummary {
    fn from(course: &Course) -> Self {
        CourseSummary {
            id: course.id,
            kind: course.kind,
            name: course.name.clone(),
            code: course.code.clone(),
        }
    }
 }
--- a/src/core/models/course_file.rs
+++ b/src/core/models/course_file.rs
@ -7,7 +7,8 @@ use crate::core::models::{course::CourseId, tag::TagId};
 pub type CourseFileId = i32;
 /// A file of a course: lecture notes written in the app, or (soon) an uploaded file.
-/// Only the metadata is in the database, the content is in the storage (the NAS).
+/// Only the metadata is in the database, the content is in the storage (the NAS), in the
 /// folder of the course.
 #[derive(Debug, Clone, Serialize, Deserialize, JsonSchema)]
 pub struct CourseFile {
    pub id: CourseFileId,
@ -15,6 +16,8 @@ pub struct CourseFile {
    /// For a note, e.g. "Lecture 2 Notes: Memory subsystem", the subtitle of its pdf
    pub name: String,
    pub kind: FileKind,
    /// Path in the folder of the course, without extension, e.g. `Notes/Lecture 1 Notes`
    pub path: String,
    /// e.g. slides, notes
    pub tag_ids: Vec<TagId>,
    /// For a note: false when the last rendering failed
--- a/src/core/models/focus.rs
+++ b/src/core/models/focus.rs
@ -0,0 +1,45 @@
 use chrono::{DateTime, Utc};
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
 use crate::core::models::{course::CourseSummary, tag::TagId, task::TaskId};
 /// Record of TimeTagger (https://timetagger.app) counting a focus session. Kept by the
 /// client while the session runs, and sent back to stop it.
 #[derive(Debug, Clone, Serialize, Deserialize, JsonSchema)]
 pub struct TimetaggerRecord {
    pub key: String,
    /// Start, unix timestamp in seconds
    pub t1: i64,
    /// Description holding the tags, e.g. `#cs-477 #homework #exercise-set-3`
    pub ds: String,
 }
 /// A focus session started on a task
 #[derive(Debug, Clone, Serialize, JsonSchema)]
 pub struct FocusStart {
    pub course: CourseSummary,
    pub task_id: TaskId,
    pub name: String,
    /// Name of the parent task, for a subtask
    pub parent_name: Option<String>,
    /// Tags of the task, or of its parent for a subtask without any
    pub tag_ids: Vec<TagId>,
    /// Seconds already spent on the task before this session
    pub time_spent: i32,
    pub started_at: DateTime<Utc>,
    /// Whether TimeTagger is configured
    pub timetagger_enabled: bool,
    /// The running record, `None` when TimeTagger is not configured or failed
    pub timetagger: Option<TimetaggerRecord>,
    /// Why TimeTagger failed, the session runs anyway
    pub timetagger_error: Option<String>,
 }
 /// End of a focus session
 #[derive(Debug, Clone, Serialize, JsonSchema)]
 pub struct FocusStop {
    /// Seconds spent on the task, this session included
    pub time_spent: i32,
    pub timetagger_error: Option<String>,
 }
--- a/src/core/models/mod.rs
+++ b/src/core/models/mod.rs
@ -1,5 +1,6 @@
 pub mod course;
 pub mod course_file;
 pub mod focus;
 pub mod grade;
 pub mod localized_string;
 pub mod tag;
--- a/src/core/models/tag.rs
+++ b/src/core/models/tag.rs
@ -15,6 +15,8 @@ pub struct Tag {
    pub name: LocalizedString,
    /// Hex color used to display what is tagged, e.g. `#2563eb`
    pub color: String,
    /// Stable name, e.g. `homework`
    pub slug: Option<String>,
    /// What the tag can label
    pub scopes: Vec<TagScope>,
 }
--- a/src/core/models/task.rs
+++ b/src/core/models/task.rs
@ -2,7 +2,10 @@ use chrono::{DateTime, Utc};
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
-use crate::core::models::{course::CourseId, tag::TagId};
+use crate::core::models::{
    course::{CourseId, CourseKind, CourseSummary},
    tag::TagId,
 };
 pub type TaskId = i32;
@ -20,6 +23,8 @@ pub struct Task {
    pub deadline: Option<DateTime<Utc>>,
    pub done: bool,
    pub tag_ids: Vec<TagId>,
    /// Seconds spent working on it, counted by the pomodoro
    pub time_spent: i32,
    /// Sorted like the tasks. Always empty for a subtask: there is only one level.
    pub subtasks: Vec<Task>,
 }
@ -48,6 +53,7 @@ pub struct CourseTasks {
 pub struct CalendarTask {
    pub task_id: TaskId,
    pub course_id: CourseId,
    pub course_kind: CourseKind,
    pub course_name: String,
    pub course_code: Option<String>,
    /// Name of the task, prefixed by the one of its parent for a subtask
@ -58,3 +64,11 @@ pub struct CalendarTask {
    /// Tags of the task, or of its parent for a subtask without any
    pub tag_ids: Vec<TagId>,
 }
 /// A task not done yet, with its course, for the list of the things to do
 #[derive(Debug, Clone, Serialize, JsonSchema)]
 pub struct TodoTask {
    pub course: CourseSummary,
    /// With all its subtasks, the ones done included
    pub task: Task,
 }
--- a/src/core/repositories/course_files_repository.rs
+++ b/src/core/repositories/course_files_repository.rs
@ -22,14 +22,16 @@ pub trait CourseFilesRepository {
        &self,
        course_id: CourseId,
        name: String,
        path: String,
        tag_ids: &[TagId],
    ) -> Result<CourseFile, RepositoryError>;
-    /// Sets the name and `has_pdf`, and bumps `updated_at`. `NotFound` if the note does
+    /// Sets the name, path and `has_pdf`, and bumps `updated_at`. `NotFound` if the note
-    /// not exist.
+    /// does not exist.
    async fn update_lecture_note(
        &self,
        id: CourseFileId,
        name: String,
        path: String,
        has_pdf: bool,
    ) -> Result<CourseFile, RepositoryError>;
    /// `NotFound` if the file does not exist
--- a/src/core/repositories/courses_repository.rs
+++ b/src/core/repositories/courses_repository.rs
@ -10,17 +10,22 @@ use crate::core::{
 #[async_trait]
 pub trait CoursesRepository {
-    /// Every course with its slots, sorted by name
+    /// Every course and association with its slots, sorted by name
    async fn get_courses(&self) -> Result<Vec<Course>, RepositoryError>;
    /// `NotFound` if the course does not exist
    async fn get_course(&self, id: CourseId) -> Result<Course, RepositoryError>;
-    /// Creates a course without any slot
+    /// Creates a course without any slot, its files in `folder`
-    async fn create_course(&self, course: CourseData) -> Result<Course, RepositoryError>;
+    async fn create_course(
-    /// Replaces the course, keeping its slots. `NotFound` if the course does not exist.
+        &self,
        course: CourseData,
        folder: &str,
    ) -> Result<Course, RepositoryError>;
    /// Replaces the course, keeping its slots and its kind. `NotFound` if the course does not exist.
    async fn update_course(
        &self,
        id: CourseId,
        course: CourseData,
        folder: &str,
    ) -> Result<Course, RepositoryError>;
    /// Deletes the course and everything attached to it. `NotFound` if it does not exist.
    async fn delete_course(&self, id: CourseId) -> Result<(), RepositoryError>;
--- a/src/core/repositories/mod.rs
+++ b/src/core/repositories/mod.rs
@ -20,6 +20,7 @@ pub mod pdf_renderer;
 pub mod storage_repository;
 pub mod tags_repository;
 pub mod tasks_repository;
 pub mod time_tracker;
 /// Add every new repository trait here so the controller can use it through `db`
 #[async_trait]
--- a/src/core/repositories/storage_repository.rs
+++ b/src/core/repositories/storage_repository.rs
@ -15,4 +15,7 @@ pub trait StorageRepository: Send + Sync {
    async fn delete_file(&self, path: &str) -> Result<(), RepositoryError>;
    /// Deletes a directory and everything in it. Does nothing if it does not exist.
    async fn delete_dir(&self, path: &str) -> Result<(), RepositoryError>;
    /// Moves a file or a directory, creating the missing parents of `to`. `NotFound` if
    /// `from` does not exist, an error if `to` already exists.
    async fn rename(&self, from: &str, to: &str) -> Result<(), RepositoryError>;
 }
--- a/src/core/repositories/tasks_repository.rs
+++ b/src/core/repositories/tasks_repository.rs
@ -20,6 +20,9 @@ pub trait TasksRepository {
        from: DateTime<Utc>,
        to: DateTime<Utc>,
    ) -> Result<Vec<Task>, RepositoryError>;
    /// Tasks not done of every course, with all their subtasks. Flat: `subtasks` is always
    /// empty.
    async fn get_todo_tasks(&self) -> Result<Vec<Task>, RepositoryError>;
    /// A single task, `subtasks` empty. `NotFound` if the task does not exist.
    async fn get_task(&self, id: TaskId) -> Result<Task, RepositoryError>;
    async fn create_task(
@ -30,6 +33,9 @@ pub trait TasksRepository {
    ) -> Result<(), RepositoryError>;
    /// Replaces the task and its tags. `NotFound` if the task does not exist.
    async fn update_task(&self, id: TaskId, task: TaskData) -> Result<(), RepositoryError>;
    /// Adds `seconds` to the time spent on the task, returns the new total. `NotFound` if
    /// the task does not exist.
    async fn add_time_spent(&self, id: TaskId, seconds: i32) -> Result<i32, RepositoryError>;
    /// Deletes the task and its subtasks. `NotFound` if the task does not exist.
    async fn delete_task(&self, id: TaskId) -> Result<(), RepositoryError>;
 }
--- a/src/core/repositories/time_tracker.rs
+++ b/src/core/repositories/time_tracker.rs
@ -0,0 +1,21 @@
 use async_trait::async_trait;
 use chrono::{DateTime, Utc};
 use crate::core::{models::focus::TimetaggerRecord, repositories::RepositoryError};
 /// Where the focus sessions are also counted: TimeTagger
 #[async_trait]
 pub trait TimeTracker: Send + Sync {
    /// Starts a running record described by `description` (text and `#tags`)
    async fn start(
        &self,
        description: &str,
        start: DateTime<Utc>,
    ) -> Result<TimetaggerRecord, RepositoryError>;
    /// Stops a running record at `end`
    async fn stop(
        &self,
        record: &TimetaggerRecord,
        end: DateTime<Utc>,
    ) -> Result<(), RepositoryError>;
 }
--- a/src/main.rs
+++ b/src/main.rs
@ -5,8 +5,14 @@ use tracing::info;
 use tracing_subscriber::{EnvFilter, layer::SubscriberExt, util::SubscriberInitExt};
 use crate::{
-    core::controller::{AppController, course_files::NotesSettings},
+    core::{
-    services::{database::SqlxDatabase, pandoc::PandocRenderer, storage::LocalStorage},
+        controller::{AppController, course_files::NotesSettings},
        repositories::time_tracker::TimeTracker,
    },
    services::{
        database::SqlxDatabase, pandoc::PandocRenderer, storage::LocalStorage,
        timetagger::Timetagger,
    },
 };
 mod api;
@ -44,11 +50,21 @@ async fn main() {
            .map(|logo| template_dir.join(logo).display().to_string()),
    };
    let time_tracker = config.timetagger.as_ref().map(|timetagger| {
        let url = timetagger
            .url
            .as_deref()
            .unwrap_or("https://timetagger.app/api/v2");
        info!("Focus sessions are counted in TimeTagger ({url})");
        Arc::new(Timetagger::new(url, timetagger.token.clone())) as Arc<dyn TimeTracker>
    });
    let controller = AppController::new(
        Arc::new(Box::new(db)),
        Arc::new(LocalStorage::new(&config.storage_dir)),
        Arc::new(PandocRenderer::new(template_dir)),
        notes,
        time_tracker,
    );
    // Anything that is not an api route is served from the built frontend,
--- a/src/services/database/course_files.rs
+++ b/src/services/database/course_files.rs
@ -19,6 +19,7 @@ struct CourseFileDB {
    pub course_id: i32,
    pub name: String,
    pub kind: String,
    pub path: String,
    pub tag_ids: Vec<i32>,
    pub has_pdf: bool,
    pub created_at: DateTime<Utc>,
@ -42,6 +43,7 @@ impl TryFrom<CourseFileDB> for CourseFile {
                    )));
                }
            },
            path: value.path,
            tag_ids: value.tag_ids,
            has_pdf: value.has_pdf,
            created_at: value.created_at,
@ -62,7 +64,7 @@ impl CourseFilesRepository for SqlxDatabase {
    ) -> Result<Vec<CourseFile>, RepositoryError> {
        query_as!(
            CourseFileDB,
-            r#"SELECT f.id, f.course_id, f.name, f.kind, f.has_pdf, f.created_at, f.updated_at,
+            r#"SELECT f.id, f.course_id, f.name, f.kind, f.path, f.has_pdf, f.created_at, f.updated_at,
                      COALESCE(ARRAY_AGG(ft.tag_id ORDER BY ft.tag_id)
                               FILTER (WHERE ft.tag_id IS NOT NULL), '{}') AS "tag_ids!"
               FROM course_files f
@ -82,7 +84,7 @@ impl CourseFilesRepository for SqlxDatabase {
    async fn get_course_file(&self, id: CourseFileId) -> Result<CourseFile, RepositoryError> {
        query_as!(
            CourseFileDB,
-            r#"SELECT f.id, f.course_id, f.name, f.kind, f.has_pdf, f.created_at, f.updated_at,
+            r#"SELECT f.id, f.course_id, f.name, f.kind, f.path, f.has_pdf, f.created_at, f.updated_at,
                      COALESCE(ARRAY_AGG(ft.tag_id ORDER BY ft.tag_id)
                               FILTER (WHERE ft.tag_id IS NOT NULL), '{}') AS "tag_ids!"
               FROM course_files f
@ -101,14 +103,16 @@ impl CourseFilesRepository for SqlxDatabase {
        &self,
        course_id: CourseId,
        name: String,
        path: String,
        tag_ids: &[TagId],
    ) -> Result<CourseFile, RepositoryError> {
        let mut tx = self.pool.begin().await?;
        let id = query!(
-            r#"INSERT INTO course_files (course_id, name, kind) VALUES ($1, $2, 'note')
+            r#"INSERT INTO course_files (course_id, name, kind, path) VALUES ($1, $2, 'note', $3)
               RETURNING id"#,
            course_id,
            name,
            path,
        )
        .fetch_one(&mut *tx)
        .await?
@ -129,13 +133,15 @@ impl CourseFilesRepository for SqlxDatabase {
        &self,
        id: CourseFileId,
        name: String,
        path: String,
        has_pdf: bool,
    ) -> Result<CourseFile, RepositoryError> {
        let result = query!(
-            r#"UPDATE course_files SET name = $2, has_pdf = $3, updated_at = now()
+            r#"UPDATE course_files SET name = $2, path = $3, has_pdf = $4, updated_at = now()
               WHERE id = $1 AND kind = 'note'"#,
            id,
            name,
            path,
            has_pdf,
        )
        .execute(&self.pool)
--- a/src/services/database/courses.rs
+++ b/src/services/database/courses.rs
@ -10,7 +10,7 @@ use sqlx::{PgExecutor, query, query_as};
 use crate::{
    core::{
        models::{
-            course::{Course, CourseData, CourseId},
+            course::{Course, CourseData, CourseId, CourseKind},
            time_slot::{TimeSlot, TimeSlotData, TimeSlotId},
        },
        repositories::{RepositoryError, courses_repository::CoursesRepository},
@ -20,22 +20,34 @@ use crate::{
 struct CourseDB {
    pub id: i32,
    pub kind: String,
    pub name: String,
    pub code: Option<String>,
    pub teachers: Vec<String>,
    pub main_page_url: Option<String>,
    pub folder: String,
 }
 impl CourseDB {
-    fn with_slots(self, slots: Vec<TimeSlot>) -> Course {
+    fn with_slots(self, slots: Vec<TimeSlot>) -> Result<Course, RepositoryError> {
-        Course {
+        Ok(Course {
            id: self.id,
            kind: match self.kind.as_str() {
                "course" => CourseKind::Course,
                "association" => CourseKind::Association,
                kind => {
                    return Err(RepositoryError::TypeConversion(format!(
                        "invalid course kind {kind}"
                    )));
                }
            },
            name: self.name,
            code: self.code,
            teachers: self.teachers,
            main_page_url: self.main_page_url,
            folder: self.folder,
            slots,
-        }
+        })
    }
 }
@ -87,7 +99,8 @@ impl CoursesRepository for SqlxDatabase {
    async fn get_courses(&self) -> Result<Vec<Course>, RepositoryError> {
        let courses = query_as!(
            CourseDB,
-            r#"SELECT id, name, code, teachers, main_page_url FROM courses ORDER BY name, id"#
+            r#"SELECT id, kind, name, code, teachers, main_page_url, folder
               FROM courses ORDER BY name, id"#
        )
        .fetch_all(&self.pool)
        .await?;
@ -108,65 +121,75 @@ impl CoursesRepository for SqlxDatabase {
                .push(slot.try_into()?);
        }
-        Ok(courses
+        courses
            .into_iter()
            .map(|course| {
                let slots = slots_by_course.remove(&course.id).unwrap_or_default();
                course.with_slots(slots)
            })
-            .collect())
+            .collect()
    }
    async fn get_course(&self, id: CourseId) -> Result<Course, RepositoryError> {
        let row = query_as!(
            CourseDB,
-            r#"SELECT id, name, code, teachers, main_page_url FROM courses WHERE id = $1"#,
+            r#"SELECT id, kind, name, code, teachers, main_page_url, folder
               FROM courses WHERE id = $1"#,
            id,
        )
        .fetch_optional(&self.pool)
        .await?
        .ok_or_else(|| RepositoryError::NotFound(format!("course {id}")))?;
        let slots = get_slots(&self.pool, id).await?;
-        Ok(row.with_slots(slots))
+        row.with_slots(slots)
    }
-    async fn create_course(&self, course: CourseData) -> Result<Course, RepositoryError> {
+    async fn create_course(
        &self,
        course: CourseData,
        folder: &str,
    ) -> Result<Course, RepositoryError> {
        let row = query_as!(
            CourseDB,
-            r#"INSERT INTO courses (name, code, teachers, main_page_url)
+            r#"INSERT INTO courses (kind, name, code, teachers, main_page_url, folder)
-               VALUES ($1, $2, $3, $4)
+               VALUES ($1, $2, $3, $4, $5, $6)
-               RETURNING id, name, code, teachers, main_page_url"#,
+               RETURNING id, kind, name, code, teachers, main_page_url, folder"#,
            course.kind.as_str(),
            course.name,
            course.code,
            &course.teachers,
            course.main_page_url,
            folder,
        )
        .fetch_one(&self.pool)
        .await?;
-        Ok(row.with_slots(Vec::new()))
+        row.with_slots(Vec::new())
    }
    async fn update_course(
        &self,
        id: CourseId,
        course: CourseData,
        folder: &str,
    ) -> Result<Course, RepositoryError> {
        let row = query_as!(
            CourseDB,
-            r#"UPDATE courses SET name = $2, code = $3, teachers = $4, main_page_url = $5
+            r#"UPDATE courses
               SET name = $2, code = $3, teachers = $4, main_page_url = $5, folder = $6
               WHERE id = $1
-               RETURNING id, name, code, teachers, main_page_url"#,
+               RETURNING id, kind, name, code, teachers, main_page_url, folder"#,
            id,
            course.name,
            course.code,
            &course.teachers,
            course.main_page_url,
            folder,
        )
        .fetch_optional(&self.pool)
        .await?
        .ok_or_else(|| RepositoryError::NotFound(format!("course {id}")))?;
        let slots = get_slots(&self.pool, id).await?;
-        Ok(row.with_slots(slots))
+        row.with_slots(slots)
    }
    async fn delete_course(&self, id: CourseId) -> Result<(), RepositoryError> {
--- a/src/services/database/tags.rs
+++ b/src/services/database/tags.rs
@ -14,6 +14,7 @@ struct TagDB {
    pub id: i32,
    pub name: Value,
    pub color: String,
    pub slug: Option<String>,
    pub scopes: Vec<String>,
 }
@ -36,6 +37,7 @@ impl TryFrom<TagDB> for Tag {
            id: value.id,
            name: serde_json::from_value(value.name)?,
            color: value.color,
            slug: value.slug,
            scopes: value
                .scopes
                .iter()
@ -50,7 +52,7 @@ impl TagsRepository for SqlxDatabase {
    async fn get_tags(&self, scope: Option<TagScope>) -> Result<Vec<Tag>, RepositoryError> {
        query_as!(
            TagDB,
-            r#"SELECT id, name, color, scopes FROM tags
+            r#"SELECT id, name, color, slug, scopes FROM tags
               WHERE $1::TEXT IS NULL OR $1 = ANY(scopes)
               ORDER BY id"#,
            scope.map(TagScope::as_str),
--- a/src/services/database/tasks.rs
+++ b/src/services/database/tasks.rs
@ -26,6 +26,7 @@ struct TaskDB {
    pub links: Vec<String>,
    pub deadline: Option<DateTime<Utc>>,
    pub done: bool,
    pub time_spent: i32,
    pub tag_ids: Vec<i32>,
 }
@ -41,6 +42,7 @@ impl From<TaskDB> for Task {
            deadline: value.deadline,
            done: value.done,
            tag_ids: value.tag_ids,
            time_spent: value.time_spent,
            subtasks: Vec::new(),
        }
    }
@ -73,7 +75,7 @@ impl TasksRepository for SqlxDatabase {
        Ok(query_as!(
            TaskDB,
            r#"SELECT t.id, t.course_id, t.parent_id, t.name, t.description, t.links,
-                      t.deadline, t.done,
+                      t.deadline, t.done, t.time_spent,
                      COALESCE(ARRAY_AGG(tt.tag_id ORDER BY tt.tag_id)
                               FILTER (WHERE tt.tag_id IS NOT NULL), '{}') AS "tag_ids!"
               FROM tasks t
@ -98,7 +100,7 @@ impl TasksRepository for SqlxDatabase {
        Ok(query_as!(
            TaskDB,
            r#"SELECT t.id, t.course_id, t.parent_id, t.name, t.description, t.links,
-                      t.deadline, t.done,
+                      t.deadline, t.done, t.time_spent,
                      COALESCE(ARRAY_AGG(tt.tag_id ORDER BY tt.tag_id)
                               FILTER (WHERE tt.tag_id IS NOT NULL), '{}') AS "tag_ids!"
               FROM tasks t
@ -118,11 +120,32 @@ impl TasksRepository for SqlxDatabase {
        .collect())
    }
    async fn get_todo_tasks(&self) -> Result<Vec<Task>, RepositoryError> {
        Ok(query_as!(
            TaskDB,
            r#"SELECT t.id, t.course_id, t.parent_id, t.name, t.description, t.links,
                      t.deadline, t.done, t.time_spent,
                      COALESCE(ARRAY_AGG(tt.tag_id ORDER BY tt.tag_id)
                               FILTER (WHERE tt.tag_id IS NOT NULL), '{}') AS "tag_ids!"
               FROM tasks t
               LEFT JOIN task_tags tt ON tt.task_id = t.id
               WHERE t.id IN (SELECT id FROM tasks WHERE parent_id IS NULL AND NOT done)
                  OR t.parent_id IN (SELECT id FROM tasks WHERE parent_id IS NULL AND NOT done)
               GROUP BY t.id
               ORDER BY t.id"#,
        )
        .fetch_all(&self.pool)
        .await?
        .into_iter()
        .map(Into::into)
        .collect())
    }
    async fn get_task(&self, id: TaskId) -> Result<Task, RepositoryError> {
        query_as!(
            TaskDB,
            r#"SELECT t.id, t.course_id, t.parent_id, t.name, t.description, t.links,
-                      t.deadline, t.done,
+                      t.deadline, t.done, t.time_spent,
                      COALESCE(ARRAY_AGG(tt.tag_id ORDER BY tt.tag_id)
                               FILTER (WHERE tt.tag_id IS NOT NULL), '{}') AS "tag_ids!"
               FROM tasks t
@ -189,6 +212,19 @@ impl TasksRepository for SqlxDatabase {
        Ok(())
    }
    async fn add_time_spent(&self, id: TaskId, seconds: i32) -> Result<i32, RepositoryError> {
        query!(
            r#"UPDATE tasks SET time_spent = time_spent + $2 WHERE id = $1
               RETURNING time_spent"#,
            id,
            seconds,
        )
        .fetch_optional(&self.pool)
        .await?
        .map(|row| row.time_spent)
        .ok_or_else(|| not_found(id))
    }
    async fn delete_task(&self, id: TaskId) -> Result<(), RepositoryError> {
        // The subtasks and the tags are removed by the `ON DELETE CASCADE`
        let result = query!("DELETE FROM tasks WHERE id = $1", id)
--- a/src/services/mod.rs
+++ b/src/services/mod.rs
@ -3,3 +3,4 @@
 pub mod database;
 pub mod pandoc;
 pub mod storage;
 pub mod timetagger;
--- a/src/services/storage.rs
+++ b/src/services/storage.rs
@ -75,4 +75,30 @@ impl StorageRepository for LocalStorage {
            _ => Ok(()),
        }
    }
    async fn rename(&self, from: &str, to: &str) -> Result<(), RepositoryError> {
        let source = self.resolve(from)?;
        let target = self.resolve(to)?;
        if !fs::try_exists(&source)
            .await
            .map_err(|err| io_error(from, err))?
        {
            return Err(RepositoryError::NotFound(format!("file {from}")));
        }
        // `rename` would silently replace a file
        if fs::try_exists(&target)
            .await
            .map_err(|err| io_error(to, err))?
        {
            return Err(RepositoryError::Internal(format!("{to} already exists")));
        }
        if let Some(parent) = target.parent() {
            fs::create_dir_all(parent)
                .await
                .map_err(|err| io_error(to, err))?;
        }
        fs::rename(source, target)
            .await
            .map_err(|err| io_error(from, err))
    }
 }
--- a/src/services/timetagger.rs
+++ b/src/services/timetagger.rs
@ -0,0 +1,135 @@
 //! Client of the TimeTagger api (https://timetagger.app/api_docs). A record is running
 //! while its start `t1` equals its end `t2`: it is created that way, then written again
 //! with its end to stop it.
 use std::{
    hash::{BuildHasher, RandomState},
    time::{Duration, SystemTime},
 };
 use async_trait::async_trait;
 use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
 use crate::core::{
    models::focus::TimetaggerRecord,
    repositories::{RepositoryError, time_tracker::TimeTracker},
 };
 const TIMEOUT: Duration = Duration::from_secs(10);
 pub struct Timetagger {
    client: reqwest::Client,
    /// e.g. `https://timetagger.app/api/v2`
    url: String,
    token: String,
 }
 impl Timetagger {
    pub fn new(url: &str, token: String) -> Self {
        Self {
            client: reqwest::Client::builder()
                .timeout(TIMEOUT)
                .build()
                .expect("Unable to build the http client"),
            url: url.trim_end_matches('/').to_owned(),
            token,
        }
    }
    async fn put(&self, record: Record<'_>) -> Result<(), RepositoryError> {
        let response = self
            .client
            .put(format!("{}/records", self.url))
            .header("authtoken", &self.token)
            .json(&[record])
            .send()
            .await
            .map_err(|err| RepositoryError::Internal(format!("TimeTagger unreachable: {err}")))?;
        let status = response.status();
        if !status.is_success() {
            let body = response.text().await.unwrap_or_default();
            return Err(RepositoryError::Internal(format!(
                "TimeTagger answered {status}: {body}"
            )));
        }
        let result: PutResult = response.json().await.map_err(|err| {
            RepositoryError::Internal(format!("Unexpected answer of TimeTagger: {err}"))
        })?;
        if !result.failed.is_empty() {
            return Err(RepositoryError::Internal(format!(
                "TimeTagger refused the record: {}",
                result.errors.join(", ")
            )));
        }
        Ok(())
    }
 }
 #[derive(Serialize)]
 struct Record<'a> {
    key: &'a str,
    t1: i64,
    t2: i64,
    ds: &'a str,
    /// Modification time
    mt: i64,
    /// Server time, set by the server
    st: f64,
 }
 #[derive(Deserialize)]
 struct PutResult {
    #[serde(default)]
    failed: Vec<String>,
    #[serde(default)]
    errors: Vec<String>,
 }
 /// Unique enough key for a record
 fn random_key() -> String {
    format!("{:016x}", RandomState::new().hash_one(SystemTime::now()))
 }
 #[async_trait]
 impl TimeTracker for Timetagger {
    async fn start(
        &self,
        description: &str,
        start: DateTime<Utc>,
    ) -> Result<TimetaggerRecord, RepositoryError> {
        let key = random_key();
        let t1 = start.timestamp();
        self.put(Record {
            key: &key,
            t1,
            t2: t1,
            ds: description,
            mt: Utc::now().timestamp(),
            st: 0.0,
        })
        .await?;
        Ok(TimetaggerRecord {
            key,
            t1,
            ds: description.to_owned(),
        })
    }
    async fn stop(
        &self,
        record: &TimetaggerRecord,
        end: DateTime<Utc>,
    ) -> Result<(), RepositoryError> {
        self.put(Record {
            key: &record.key,
            t1: record.t1,
            // A record of zero second would stay running
            t2: end.timestamp().max(record.t1 + 1),
            ds: &record.ds,
            mt: Utc::now().timestamp(),
            st: 0.0,
        })
        .await
    }
 }
--- a/src/utils/config.rs
+++ b/src/utils/config.rs
@ -30,16 +30,27 @@ pub struct NotesConfig {
    pub student_id: Option<String>,
 }
 /// TimeTagger account the focus sessions are counted in
 #[derive(Deserialize, Clone)]
 pub struct TimetaggerConfig {
    /// Api of the TimeTagger server, `https://timetagger.app/api/v2` by default
    pub url: Option<String>,
    /// Api token, from the account page of TimeTagger
    pub token: String,
 }
 #[derive(Deserialize, Clone)]
 pub struct AppConfig {
    pub server: ServerConfig,
    pub postgres: PostgresConfig,
    /// Directory containing the built frontend
    pub frontend_dir: String,
-    /// Where the files of the courses are stored (lecture notes, pdf...). A local
+    /// Where the files of the courses and associations are stored (lecture notes,
-    /// directory standing in for the NAS for now.
+    /// pdf...), one folder each. A local directory standing in for the NAS for now.
    pub storage_dir: String,
    pub notes: NotesConfig,
    /// Optional: without it the pomodoro only counts the time in the app
    pub timetagger: Option<TimetaggerConfig>,
 }
 impl AppConfig {