feat(android): CI-injected versionName with commit-count iteration

The APK was shipping with a hardcoded versionName="0.1.0-native"
and versionCode=1 — so the About card never reflected the actual
release, and two same-day re-cuts of the per-day mutable tag
v2026.06.02 looked identical to the update-banner comparator.
Operator wants the iteration restored on the APK side (the docker
tag stays plain per the earlier intentional change).

Scheme:
- Per release: versionName = "${tag}.${commit_count}", e.g.
  "2026.06.02.142", where commit_count = `git rev-list --count HEAD`.
  Monotonic across the project lifetime, deterministic, no manual
  counter to maintain.
- versionCode = commit_count. Monotonic, fits in Int forever (we're
  not hitting 2.1B commits).
- Local / debug / dev builds fall back to versionName="dev" /
  versionCode=1 so the About card reads honestly.

build.gradle.kts:
- defaultConfig reads MINSTREL_VERSION_NAME / MINSTREL_VERSION_CODE
  Gradle properties via project.findProperty with the dev fallbacks.

.gitea/workflows/release.yml:
- android-release: checkout with fetch-depth: 0 (the default shallow
  clone would return 1 for `git rev-list --count HEAD`); new
  Compute release version step exports name + code as step outputs;
  assembleRelease passes them via -P; new job-level outputs propagate
  them to the downstream image-release job.
- image-release: Stage bundled APK + version sidecar pulls the
  computed version_name from needs.android-release.outputs and
  writes it into client/minstrel.apk.version, so the server's
  /api/client/version reports the exact string baked into the APK.
  Without this the sidecar would say "v2026.06.02" while the
  installed APK has "2026.06.02.142" — isVersionNewer would call
  the bundled APK older and the update banner would thrash.

The existing isVersionNewer comparator already handles the
4-component shape ("2026.06.02.142" > "2026.06.02.141"), so no
client-side logic changes are needed.

android/app/build.gradle.kts

@@ -21,8 +21,19 @@ android {
         applicationId = "com.fabledsword.minstrel"
         minSdk = 26
         targetSdk = 36
-        versionCode = 1
-        versionName = "0.1.0-native"
+        // versionName / versionCode are released-build values injected by
+        // CI from the git tag + commit count. Local / debug builds fall
+        // back to "dev" so the About card reads honestly. Releases ship
+        // versionName="YYYY.MM.DD.<commits>" (e.g. "2026.06.02.142") and
+        // versionCode=<commits>, which is monotonic forever and lets the
+        // shared isVersionNewer comparator distinguish two same-day
+        // re-cuts (the iteration suffix differs).
+        val versionNameOverride =
+            (project.findProperty("MINSTREL_VERSION_NAME") as String?)?.takeIf { it.isNotBlank() }
+        val versionCodeOverride =
+            (project.findProperty("MINSTREL_VERSION_CODE") as String?)?.toIntOrNull()
+        versionCode = versionCodeOverride ?: 1
+        versionName = versionNameOverride ?: "dev"
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables { useSupportLibrary = true }
     }