docs: update README and release workflow

.github/workflows/release.yml

@@ -412,3 +412,98 @@ jobs:
           prerelease: ${{ needs.get-version.outputs.is_prerelease == 'true' }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  notify-telegram:
+    runs-on: ubuntu-latest
+    needs: [get-version, create-release]
+    if: ${{ needs.get-version.outputs.is_prerelease != 'true' }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Download Android APK
+        uses: actions/download-artifact@v4
+        with:
+          name: android-apk
+          path: ./release
+
+      - name: Extract changelog for version
+        id: changelog
+        run: |
+          VERSION=${{ needs.get-version.outputs.version }}
+          VERSION_NUM=${VERSION#v}
+
+          # Extract changelog, limit to ~1500 chars for Telegram (4096 limit minus message overhead)
+          FULL_CHANGELOG=$(sed -n "/^## \[$VERSION_NUM\]/,/^## \[/{ /^## \[$VERSION_NUM\]/d; /^## \[/d; p; }" CHANGELOG.md | sed '/^---$/d')
+          
+          if [ -z "$FULL_CHANGELOG" ]; then
+            CHANGELOG="See release notes on GitHub for details."
+          else
+            # Take first 1500 characters, then cut at last complete line
+            CHANGELOG=$(echo "$FULL_CHANGELOG" | head -c 1500 | sed '$d')
+            
+            # Check if truncated
+            FULL_LEN=${#FULL_CHANGELOG}
+            if [ $FULL_LEN -gt 1500 ]; then
+              CHANGELOG="${CHANGELOG}"$'\n\n... (see full changelog on GitHub)'
+            fi
+          fi
+
+          echo "$CHANGELOG" > /tmp/changelog.txt
+
+      - name: Send to Telegram Channel
+        env:
+          TELEGRAM_BOT_TOKEN: ${{ secrets.TELEGRAM_BOT_TOKEN }}
+          TELEGRAM_CHANNEL_ID: ${{ secrets.TELEGRAM_CHANNEL_ID }}
+        run: |
+          VERSION=${{ needs.get-version.outputs.version }}
+          CHANGELOG=$(cat /tmp/changelog.txt)
+          
+          # Find APK files
+          ARM64_APK=$(find ./release -name "*arm64*.apk" | head -1)
+          ARM32_APK=$(find ./release -name "*arm32*.apk" | head -1)
+          
+          # Prepare message with changelog
+          printf '%s\n' \
+            "*SpotiFLAC ${VERSION} Released!*" \
+            "" \
+            "*What's New:*" \
+            "${CHANGELOG}" \
+            "" \
+            "*Download:*" \
+            "- [arm64 APK](https://github.com/${{ github.repository }}/releases/download/${VERSION}/SpotiFLAC-${VERSION}-arm64.apk) (recommended)" \
+            "- [arm32 APK](https://github.com/${{ github.repository }}/releases/download/${VERSION}/SpotiFLAC-${VERSION}-arm32.apk)" \
+            "- [iOS IPA](https://github.com/${{ github.repository }}/releases/download/${VERSION}/SpotiFLAC-${VERSION}-ios-unsigned.ipa)" \
+            "" \
+            "[View Release Notes](https://github.com/${{ github.repository }}/releases/tag/${VERSION})" \
+            > /tmp/telegram_message.txt
+
+          MESSAGE=$(cat /tmp/telegram_message.txt)
+
+          # Send message first
+          curl -s -X POST "https://api.telegram.org/bot${TELEGRAM_BOT_TOKEN}/sendMessage" \
+            -d chat_id="${TELEGRAM_CHANNEL_ID}" \
+            -d text="${MESSAGE}" \
+            -d parse_mode="Markdown" \
+            -d disable_web_page_preview="true"
+
+          # Upload arm64 APK to channel
+          if [ -f "$ARM64_APK" ]; then
+            echo "Uploading arm64 APK to Telegram..."
+            curl -s -X POST "https://api.telegram.org/bot${TELEGRAM_BOT_TOKEN}/sendDocument" \
+              -F chat_id="${TELEGRAM_CHANNEL_ID}" \
+              -F document=@"${ARM64_APK}" \
+              -F caption="SpotiFLAC ${VERSION} - arm64 (recommended)"
+          fi
+
+          # Upload arm32 APK to channel
+          if [ -f "$ARM32_APK" ]; then
+            echo "Uploading arm32 APK to Telegram..."
+            curl -s -X POST "https://api.telegram.org/bot${TELEGRAM_BOT_TOKEN}/sendDocument" \
+              -F chat_id="${TELEGRAM_CHANNEL_ID}" \
+              -F document=@"${ARM32_APK}" \
+              -F caption="SpotiFLAC ${VERSION} - arm32"
+          fi
+
+          echo "Telegram notification sent!"