Add Obtainium-friendly release asset aliases.

Create stable universal and arm64 APK alias names and improve release display version so repo URL import works more reliably in Obtainium.

.forgejo/workflows/build_release.yml

@@ -71,9 +71,11 @@ jobs:
           set -euo pipefail
 
           version_tag="${GITHUB_REF_NAME:-${GITHUB_REF#refs/tags/}}"
+          version_display="$(printf '%s' "$version_tag" | sed -E 's/^v//' )"
           previous_tag="$(git tag --list 'v*' --sort=-version:refname | grep -Fxv "$version_tag" | head -n 1 || true)"
 
           echo "VERSION_TAG=$version_tag" >> "$GITHUB_OUTPUT"
+          echo "VERSION_DISPLAY=$version_display" >> "$GITHUB_OUTPUT"
           echo "PREV_TAG_NAME=$previous_tag" >> "$GITHUB_OUTPUT"
 
           if [ -n "$previous_tag" ]; then
@@ -178,12 +180,41 @@ jobs:
             "${apksigner_bin}" verify "${signed_apk}"
           done
 
+      - name: Create Obtainium-friendly aliases
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          alias_asset() {
+            src="$1"
+            dst="$2"
+            if [ -e "$src" ]; then
+              cp -f "$src" "$dst"
+            fi
+          }
+
+          # Prefer signed APKs; fallback to unsigned when signing is not configured.
+          alias_asset "$(ls -1t Komikku-arm64-v8a-*.apk 2>/dev/null | head -n1)" "Komikku-arm64-v8a.apk"
+          alias_asset "$(ls -1t Komikku-arm64-v8a-*-unsigned.apk 2>/dev/null | head -n1)" "Komikku-arm64-v8a.apk"
+
+          for candidate in Komikku-*.apk; do
+            case "$candidate" in
+              *arm64-v8a*|*armeabi-v7a*|*x86_64*|*x86*)
+                ;;
+              *)
+                alias_asset "$candidate" "Komikku-universal.apk"
+                break
+                ;;
+            esac
+          done
+
       - name: Create or update release
         id: release
         shell: bash
         env:
           FORGEJO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           VERSION_TAG: ${{ steps.prepare.outputs.VERSION_TAG }}
+          VERSION_DISPLAY: ${{ steps.prepare.outputs.VERSION_DISPLAY }}
           PREV_TAG_NAME: ${{ steps.prepare.outputs.PREV_TAG_NAME }}
           COMMIT_LOGS: ${{ steps.prepare.outputs.COMMIT_LOGS }}
           REPO_URL: ${{ github.server_url }}/${{ github.repository }}
@@ -201,6 +232,7 @@ jobs:
           import textwrap
 
           version_tag = os.environ["VERSION_TAG"]
+          version_display = os.environ.get("VERSION_DISPLAY", version_tag)
           previous_tag = os.environ.get("PREV_TAG_NAME", "").strip()
           commit_logs = os.environ.get("COMMIT_LOGS", "").strip() or "- Initial release"
           repo_url = os.environ["REPO_URL"]
@@ -233,7 +265,7 @@ jobs:
               <!-->
               > [!TIP]
               >
-              > ### If you are unsure which version to download then go with `Komikku-{version_tag}.apk`
+              > ### If you are unsure which version to download then go with `Komikku-universal.apk`
               """,
           )
 
@@ -241,7 +273,7 @@ jobs:
               json.dumps(
                   {
                       "tag_name": version_tag,
-                      "name": f"Komikku {version_tag}",
+                      "name": f"Komikku {version_display}",
                       "body": body,
                       "draft": True,
                       "prerelease": False,