fix(android): prevent Gradle daemon hang in Firebase test build (#155)

Dagger preserves filesystem snapshots between WithExec steps but kills
background processes. After `flutter build apk --debug` completes, the
Gradle daemon registry file remains in /home/ci/.gradle/daemon/ while
the daemon process itself is gone. The subsequent `./gradlew
app:assembleAndroidTest` step finds the stale registry entry, tries to
connect to the dead daemon, and hangs.

Fix by:
- Adding --no-daemon to the assembleAndroidTest gradlew call so it runs
  in-process and never consults the daemon registry.
- Mounting the gradle-cache volume (same as Base()) so dependencies are
  cached between runs rather than re-downloaded from scratch each time.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.forgejo/workflows/deploy.yml

@@ -74,6 +74,10 @@ jobs:
         run: task publish-android
 
       - name: Build & Deploy APK to server
+        # continue-on-error: step requires SSH_PRIVATE_KEY secret; if unset the task
+        # precondition fails, but we don't want that to fail the whole job — the Play
+        # Store publish above already succeeded.  The overall job stays green even
+        # though this step shows as failed/orange in the UI.
         continue-on-error: true
         env:
           SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
@@ -113,6 +117,11 @@ jobs:
         run: scripts/setup_dagger_remote.sh
 
       - name: Build & Deploy Linux to server
+        # continue-on-error: step requires SSH_PRIVATE_KEY secret; if unset the task
+        # precondition fails, but the build step that precedes this (done via Dagger)
+        # already succeeded.  Deployment is best-effort; a missing secret should not
+        # turn the job red.  The step will show as failed/orange in the UI even though
+        # the overall job is green — this is intentional.
         continue-on-error: true
         env:
           SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
@@ -154,6 +163,8 @@ jobs:
         run: scripts/setup_dagger_remote.sh
 
       - name: Generate build history and deploy website
+        # continue-on-error: website publish is best-effort; a missing SSH_PRIVATE_KEY
+        # should not block the overall workflow status.
         continue-on-error: true
         env:
           SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}

ci/main.go

@@ -649,9 +649,12 @@ func (m *Ci) DeployApk(
 // Returns a flat directory with app-debug.apk and app-debug-androidTest.apk.
 func (m *Ci) BuildAndroidDebugApks() *dagger.Directory {
 	built := m.setup(m.firebaseSrc()).
+		WithMountedCache("/home/ci/.gradle", dag.CacheVolume("gradle-cache"), dagger.ContainerWithMountedCacheOpts{Owner: "ci"}).
 		WithExec([]string{"flutter", "build", "apk", "--debug", "--no-pub"}).
 		WithWorkdir("/src/android").
-		WithExec([]string{"./gradlew", "app:assembleAndroidTest"}).
+		// --no-daemon avoids connecting to a stale daemon whose registry file was
+		// preserved in the Dagger layer snapshot but whose process no longer exists.
+		WithExec([]string{"./gradlew", "--no-daemon", "app:assembleAndroidTest"}).
 		WithWorkdir("/src").
 		WithExec([]string{"/bin/bash", "-c",
 			`apk=$(find /src -path "*androidTest*" -name "*.apk" -type f 2>/dev/null | head -1) && \