chore: complete v1.1 milestone

Archive v1.1 Calendar & Polish milestone artifacts (roadmap,
requirements, phase directories) to milestones/. Evolve PROJECT.md
with validated requirements and new key decisions. Update
RETROSPECTIVE.md with v1.1 section and cross-milestone trends.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.planning/milestones/v1.1-phases/05-calendar-strip/5-CONTEXT.md

@@ -0,0 +1,105 @@
+# Phase 5: Calendar Strip - Context
+
+**Gathered:** 2026-03-16
+**Status:** Ready for planning
+
+<domain>
+## Phase Boundary
+
+Replace the stacked daily plan home screen (overdue/today/tomorrow sections) with a horizontal scrollable date-strip and day-task list. Users navigate by tapping day cards to view that day's tasks below the strip. Requirements: CAL-01 through CAL-05.
+
+</domain>
+
+<decisions>
+## Implementation Decisions
+
+### Day card appearance
+- Each card shows: German day abbreviation (Mo, Di, Mi...) and date number only
+- No task-count badges, dots, or indicators on the cards
+- All cards have a light sage/green tint
+- Selected card has a noticeably stronger green and is always centered in the strip
+- Today's card uses bold text with an accent underline
+- When today is selected, both treatments combine (bold + underline + stronger green + centered)
+
+### Month boundary treatment (CAL-03)
+- A slightly wider gap between the last day of one month and the first of the next
+- A small month name label (e.g., "Apr") inserted in the gap between months
+
+### Scroll range & navigation
+- Strip scrolls both into the past and into the future (Claude picks a reasonable range balancing performance and usefulness)
+- On app launch, the strip auto-scrolls to center on today with a quick slide animation (~200ms)
+- A floating "Today" button appears when the user has scrolled away from today; tap to snap back. Hidden when today is already visible.
+
+### Task list below the strip
+- No ProgressCard — task list appears directly under the strip
+- Overdue tasks (CAL-05) appear in a separate section with coral accent header above the day's own tasks, same pattern as current "Überfällig" section
+- Task rows show: task name, tappable room tag, and checkbox — no relative date (strip already communicates which day)
+- Checkboxes are interactive — tapping completes the task with the existing slide-out animation
+
+### Empty and celebration states
+- If a selected day had tasks that were all completed: show celebration state (icon + message, same spirit as current AllClear)
+- If a selected day never had any tasks: simple centered "Keine Aufgaben" message with subtle icon
+- First-run empty state (no rooms/tasks at all): keep the current pattern pointing user to create rooms
+
+### Overdue carry-over behavior (CAL-05)
+- Overdue tasks (due before today, not yet completed) appear in a separate "Überfällig" section when viewing today
+- When viewing past days: show what was due that day (tasks whose nextDueDate matches that day)
+- When viewing future days: show only tasks due that day, no overdue carry-over
+- Overdue tasks use the existing warm coral/terracotta accent (#E07A5F)
+
+### Claude's Discretion
+- Exact scroll range (past and future day count)
+- Day card dimensions, spacing, and border radius
+- Animation curves and durations beyond the ~200ms auto-scroll
+- Floating "Today" button styling and position
+- How the celebration state adapts to the calendar context (may simplify from current full-screen version)
+- Whether to reuse DailyPlanDao or create a new CalendarDao
+- Widget architecture and state management approach
+
+</decisions>
+
+<specifics>
+## Specific Ideas
+
+- Day cards should feel like a unified strip with a light green wash — the selected day stands out by being a "marginally stronger green," not a completely different color. Think cohesive gradient, not toggle buttons.
+- The selected card is always centered — the strip scrolls to keep the selection in the middle, giving a carousel feel.
+- Month labels in the gap between months act as wayfinding, similar to section headers in a contact list.
+
+</specifics>
+
+<code_context>
+## Existing Code Insights
+
+### Reusable Assets
+- `DailyPlanTaskRow`: Existing task row widget — can be adapted by removing the relative date display and keeping name + room tag + checkbox
+- `_CompletingTaskRow`: Animated slide-out on task completion — reuse directly for calendar task list
+- `ProgressCard`: Will NOT be used in the new view, but the pattern of a card above a list is established
+- `_overdueColor` (#E07A5F): Warm coral constant already defined for overdue indicators — reuse as-is
+- `TaskWithRoom` model: Pairs task with room name/ID — directly usable for calendar task list
+
+### Established Patterns
+- Riverpod `StreamProvider.autoDispose` for reactive data (see `dailyPlanProvider`) — calendar provider follows same pattern
+- Manual provider definition (not `@riverpod`) because of drift's generated types — same constraint applies
+- Feature folder structure: `features/home/data/`, `domain/`, `presentation/` — new calendar code lives here (replaces daily plan)
+- German-only localization via `.arb` files and `AppLocalizations`
+
+### Integration Points
+- `HomeScreen` at route `/` in `router.dart` — the calendar screen replaces this widget entirely
+- `AppShell` with bottom NavigationBar — home tab stays as-is, just the screen content changes
+- `DailyPlanDao.watchAllTasksWithRoomName()` — returns all tasks sorted by nextDueDate; may need a new query or adapted filtering for arbitrary date selection
+- `TaskActionsProvider` — `completeTask(taskId)` already handles task completion and nextDueDate advancement
+- `AppDatabase` with `DailyPlanDao` registered — any new DAO must be registered here
+
+</code_context>
+
+<deferred>
+## Deferred Ideas
+
+None — discussion stayed within phase scope
+
+</deferred>
+
+---
+
+*Phase: 05-calendar-strip*
+*Context gathered: 2026-03-16*