Add discovery UI, hide NSFW setting, and pack progress

- New discovery components (ContentTile, ContentRow, CircularProgress)
- Refactor home screen with compact header and content tiles
- Add hide_nsfw profile setting for content filtering
- Add color column to categories table
- Track pack progress (answered/total questions)
- Update related stores and tests

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/supabase/migrations/20260125000000_add_hide_nsfw_to_profiles.sql

@@ -0,0 +1,9 @@
+-- Add hide_nsfw column to profiles table
+-- When true, packs marked as is_explicit will be hidden from the user
+-- Independent of max_intensity setting
+
+ALTER TABLE profiles
+ADD COLUMN IF NOT EXISTS hide_nsfw BOOLEAN DEFAULT false;
+
+COMMENT ON COLUMN profiles.hide_nsfw IS
+  'When true, packs marked as is_explicit will be hidden. Independent of max_intensity.';

apps/supabase/migrations/20260125100315_add_color_to_categories.sql

@@ -0,0 +1,7 @@
+-- Add color column to categories table
+-- Allows explicit color assignment; app falls back to name-based color logic if NULL
+
+ALTER TABLE categories
+ADD COLUMN color text;
+
+COMMENT ON COLUMN categories.color IS 'Hex color code (e.g. #14B8A6) for category tiles. Falls back to app logic if NULL.';