feat(todo): Today, Upcoming, Inbox, projects, quick add and the task sheet (ADR 0033, D8, D9)

The tabs hold the person's tasks: Today what is overdue (Reschedule
moving it all to a day, times kept) and what is due today; Upcoming the
overdue ones and the next four weeks day by day; Inbox and each
project's screen from Browse the tasks above and in their sections, done
ones on asking; Browse the projects with their open counts and the
labels. A task's row shows its check in its priority's colour, its date
in the colour of how near it is, its deadline, its sub-tasks done and
its labels; quick add takes its title, date, priority, project, labels
and description and stays for the next; its sheet edits all of it, adds
sub-tasks and deletes it with them after asking. Colours are the
palette's, cerise for overdue and P1 against the strawberry wash.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

docs/adr/0033-halkyon-todo.md

@@ -1,8 +1,8 @@
 # ADR 0033: Halkyon Todo, what it does and how it looks
 
 - **Status:** decided 1 Nov 2026, by the developer (D1–D10 below, the agent's
-  recommendations taken as a whole). Nothing of it is built yet: Todo is still the shell
-  of 19 Oct 2026 (`apps/todo/AGENTS.md`), an empty home and an account sheet.
+  recommendations taken as a whole). Built the same day: steps 1 to 3 and Today and
+  Upcoming as lists (step 4 without recurrence, reminders and the week strip).
 - **Numbering:** 0025–0029 are held (ADR 0030's note), 0032 is Jellyfin's; this is the
   next free number.
 - **Builds on:** ADR 0030, D7, D12, D14, D15 and D60 (Train's sealed rows, its shell, its