feat: add theme provider and control components for light/dark mode

- Implemented ThemeProvider to manage theme state and preferences.
- Added ThemeControl component for users to switch between system, light, and dark themes.
- Integrated localStorage for theme preference persistence.
- Updated document styles based on theme changes.

test: add tests for permanent deletion of habits and related records

- Created tests to ensure permanent deletion of habits removes all dependent records.
- Verified that deletion requires ownership, authentication, and checks for archived habits.
- Added tests to confirm rollback behavior on deletion failures.

test: add tests for habit palette and progress card functionality

- Implemented tests for habit color progression and theme-based color shading.
- Added tests for progress card calculations and calendar display logic.

feat: define theme types and preferences

- Introduced Theme and ThemePreference types for better type safety.
- Created utility functions for resolving theme based on user preference and system settings.
- Defined theme palettes for light and dark modes to ensure adequate contrast.

README.md

@@ -1,4 +1,4 @@
-# Minabot
+# Mina Habits
 
 Bun + Hono habit-tracking REST API with Drizzle ORM and local SQLite. The React Router
 client includes a homepage for signed-out visitors and a personal habit dashboard.
@@ -67,7 +67,9 @@ its own recurrence. Both habit and task schedules support daily, selected weekda
 day intervals, and week intervals with an editable start date and weekday.
 Archive asks for confirmation in a modal and preserves earlier history.
 **Archived habits** opens the archive modal, with history inspection and restoration
-starting today. Task deletion uses the same modal confirmation. Tasks
+starting today. **Delete permanently** removes an archived habit and all its history
+after confirmation; it also removes the habit from combined charts and deletes
+charts left empty. Task deletion uses the same modal confirmation. Tasks
 remain manageable on days off, while their checkboxes stay disabled.
 Settings, sharing, new habits, and historical check-ins also open in native dialogs.
 Dialogs keep the background inactive, contain keyboard focus, support Escape and
@@ -85,16 +87,18 @@ Combined-chart management is not exposed on this homepage.
 
 The dashboard opens with a compact greeting and a Today filter. All habits includes
 routines on days off; creating a habit or editing one out of today’s schedule keeps
-it reachable in All habits. Saved calendars expand through **View history**, with
-historical corrections available inside the expanded view. Selecting a square
+it reachable in All habits. Every habit shows its calendar immediately, starting with three months and offering
+longer ranges. Historical corrections are available by selecting a day. Selecting a square
 only changes the inspected day; it preserves the date range and number of weeks,
 including on untracked, unscheduled, and future dates. An external editor date
 outside a preset window can still bring that date into view.
 
-Each saved habit uses its own action layout: count goals have a prominent counter
-and unit inside a tinted panel, simple check-ins use a compact checkbox-and-heading
-row, and routines use a bordered checklist with a progress header. Daily schedule labels and
-duplicate progress copy are omitted; days off stay explicit.
+Each saved habit shares a serif heading, type label, color marker, schedule, and
+explicit completion status. A visible graph sits beside a neutral completion panel:
+count goals show their target, unit, and editable counter; check-ins show a labeled
+checkbox; routines show an open task list and progress. On narrow screens, completion
+controls stack above the graph. Spacing, typography, and neutral surfaces use the
+shared design-system tokens; habit color marks identity and progress.
 
 Count totals can be typed directly and saved with **Save** or Enter. Escape restores
 the recorded total; plus and minus remain available. Counts may exceed the target.