docs: update backlog tasks for CI optimization work

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

Author: pythoninthegrass

backlog/tasks/task-031 - Consolidate-shared-CI-workflow-steps-between-iOS-and-Android-builds.md

@@ -1,11 +1,11 @@
 ---
 id: task-031
 title: Consolidate shared CI workflow steps between iOS and Android builds
-status: To Do
+status: Done
 assignee:
   - '@claude'
 created_date: '2026-02-03 00:00'
-updated_date: '2026-02-03 19:38'
+updated_date: '2026-02-04 20:51'
 labels:
   - ci
   - github-actions
@@ -39,7 +39,7 @@ This duplication increases maintenance burden and risks drift between workflows.
 - [x] #3 Extract common setup into shared workflow/action
 - [x] #4 iOS workflow uses shared setup
 - [x] #5 Android workflow uses shared setup
-- [ ] #6 Both workflows still function correctly after refactor
+- [x] #6 Both workflows still function correctly after refactor
 - [x] #7 Document the shared workflow/action usage
 <!-- AC:END -->
 

backlog/tasks/task-035 - Optimize-Android-CI-build-time.md

@@ -1,15 +1,18 @@
 ---
 id: task-035
 title: Optimize Android CI build time
-status: To Do
-assignee: []
+status: In Progress
+assignee:
+  - '@claude'
 created_date: '2026-02-04 20:47'
+updated_date: '2026-02-04 20:53'
 labels:
   - ci
   - android
   - performance
 dependencies: []
 priority: medium
+ordinal: 1000
 ---
 
 ## Description
@@ -24,8 +27,28 @@ Android CI builds take ~8 minutes compared to iOS's ~2 minutes. Two optimization
 
 ## Acceptance Criteria
 <!-- AC:BEGIN -->
-- [ ] #1 Android Rust target directories are included in GHA cache
-- [ ] #2 Android builds target only aarch64-linux-android and armv7-linux-androideabi
-- [ ] #3 i686-linux-android and x86_64-linux-android targets are removed from CI builds
+- [x] #1 Android Rust target directories are included in GHA cache
+- [x] #2 Android builds target only aarch64-linux-android and armv7-linux-androideabi
+- [x] #3 i686-linux-android and x86_64-linux-android targets are removed from CI builds
 - [ ] #4 Android CI build time is reduced (target: under 5 minutes)
 <!-- AC:END -->
+
+## Implementation Plan
+
+<!-- SECTION:PLAN:BEGIN -->
+1. Modify setup-tauri-build action to add Android Rust target directories to cache path
+2. Reduce Android Rust targets from 4 to 2 (arm64 + armv7 only)
+3. Update cache key to include only the relevant target directories
+4. Test by examining the resulting configuration
+<!-- SECTION:PLAN:END -->
+
+## Implementation Notes
+
+<!-- SECTION:NOTES:BEGIN -->
+Modified `.github/actions/setup-tauri-build/action.yml`:
+
+- Added Rust target directories to Android cache path (`src-tauri/target/aarch64-linux-android`, `src-tauri/target/armv7-linux-androideabi`)
+- Reduced Android targets from 4 to 2: removed `i686-linux-android` and `x86_64-linux-android`
+
+AC #4 (build time reduction) must be verified after CI runs.
+<!-- SECTION:NOTES:END -->