[ci] run android pr checks

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,34 @@
+## Why
+
+- 
+
+## What
+
+- 
+
+## Result
+
+- 
+
+## Checks
+
+- [ ] build passes
+- [ ] tests pass
+- [ ] lint passes
+- [ ] focused on one purpose
+- [ ] small enough to review calmly
+- [ ] commit messages follow repository style
+- [ ] final squash commit matches PR title
+- [ ] deeper reasoning stays in this PR description
+- [ ] squash commit is one clean title-style line
+- [ ] review comments preserve useful reasoning when needed
+- [ ] screenshots are consistent when UI changes
+- [ ] release notes are calm when release-facing
+
+## Branch Rules
+
+- [ ] targets `main`
+- [ ] no direct push to `main`
+- [ ] no force push to `main`
+- [ ] squash merge only
+- [ ] required status checks pass

.github/workflows/android.yml

@@ -0,0 +1,44 @@
+name: android
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: android-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  android:
+    name: build test lint
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v6
+
+      - name: set up java
+        uses: actions/setup-java@v5
+        with:
+          distribution: temurin
+          java-version: 21
+
+      - name: set up gradle
+        uses: gradle/actions/setup-gradle@v6
+
+      - name: validate gradle wrapper
+        uses: gradle/actions/wrapper-validation@v6
+
+      - name: build debug apk
+        run: ./gradlew :app:assembleDebug
+
+      - name: run unit tests
+        run: ./gradlew :app:testDebugUnitTest
+
+      - name: run lint
+        run: ./gradlew :app:lintDebug

.github/workflows/pr-check.yml

@@ -0,0 +1,43 @@
+name: pr check
+
+on:
+  pull_request:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+concurrency:
+  group: pr-check-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  android:
+    name: build test lint
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v6
+
+      - name: set up java
+        uses: actions/setup-java@v5
+        with:
+          distribution: temurin
+          java-version: 21
+
+      - name: set up gradle
+        uses: gradle/actions/setup-gradle@v6
+
+      - name: validate gradle wrapper
+        uses: gradle/actions/wrapper-validation@v6
+
+      - name: build debug apk
+        run: ./gradlew :app:assembleDebug
+
+      - name: run unit tests
+        run: ./gradlew :app:testDebugUnitTest
+
+      - name: run lint
+        run: ./gradlew :app:lintDebug

.gitignore

@@ -10,6 +10,8 @@
 /.idea/assetWizardSettings.xml
 /.idea/deploymentTargetSelector.xml
 /.idea/deviceManager.xml
+/.idea/.name
+/.idea/markdown.xml
 .DS_Store
 /build
 /captures