chore: batch fix final-review findings on Plan 01

- ROADMAP: mark v0.1 (Foundation & CI) as complete
- REQUIREMENTS: move Foundation & CI from Active to Validated (shipped)
- AndroidManifest: drop redundant android:label and android:theme on
  MainActivity - both inherited from <application>
- build.gradle.kts: move ui-tooling-preview to debugImplementation
  (@Preview annotations are dev-only; release APK stays smaller)

All foundation verification (lint + test + assembleDebug) still green.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.planning/REQUIREMENTS.md

@@ -5,11 +5,11 @@ See full design spec: `docs/superpowers/specs/2026-06-08-calendar-app-design.md`
 ## V1 Scope (Variant "B")
 
 ### Validated (shipped)
-- (none yet — first milestone in progress)
+- Foundation & CI infrastructure — v0.1.0 (2026-06-08)
 
 ### Active (V1)
 
-- [ ] Foundation & CI infrastructure
+- [x] Foundation & CI infrastructure
 - [ ] Data Layer over `CalendarContract`
 - [ ] Permission flow (`READ_CALENDAR`)
 - [ ] Month view (S1)

.planning/ROADMAP.md

@@ -4,7 +4,7 @@
 
 | Version | Milestone | Status |
 |---|---|---|
-| v0.1 | Foundation & CI | in progress |
+| v0.1 | Foundation & CI | complete |
 | v0.2 | Data Layer & Permission Flow | pending |
 | v0.3 | Month view | pending |
 | v0.4 | Week view | pending |