feat: inject version from release tag at build time

pubspec.yaml now holds a placeholder (0.0.0+0) that is never updated.
CI strips the v* tag to derive --build-name (e.g. 26.03.12) and
--build-number (e.g. 260312) and passes them to flutter build apk.

.forgejo/workflows/ci.yml

@@ -55,7 +55,14 @@ jobs:
         run: flutter pub get
 
       - name: Build release APK
-        run: flutter build apk --release
+        run: |
+          # Derive version from the tag (e.g. v26.03.12 → name=26.03.12 number=260312)
+          TAG="${{ github.ref_name }}"
+          BUILD_NAME="${TAG#v}"
+          BUILD_NUMBER=$(echo "$BUILD_NAME" | tr -d '.')
+          flutter build apk --release \
+            --build-name="$BUILD_NAME" \
+            --build-number="$BUILD_NUMBER"
 
       - name: Set artifact name
         id: artifact

pubspec.yaml

@@ -2,7 +2,7 @@ name: fabled_app
 description: "FabledAssistant mobile client for Android."
 publish_to: 'none'
 
-version: 26.03.12+1
+version: 0.0.0+0  # overridden at build time via --build-name / --build-number
 
 environment:
   sdk: ^3.11.0