fix: add Tauri signing key decoding in GitHub Actions

.github/workflows/release.yml

@@ -83,22 +83,42 @@ jobs:
       - name: Install frontend deps
         run: pnpm install --frozen-lockfile
 
+      - name: Prepare Tauri signing key
+        shell: bash
+        run: |
+          RAW="${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}"
+          # 如果是原始两行（以 untrusted comment: 开头）
+          if echo "$RAW" | head -n1 | grep -q '^untrusted comment:'; then
+            printf '%s' "$RAW" > "$RUNNER_TEMP/tauri.key"
+          # 否则尝试当作 Base64 解码恢复两行
+          elif printf '%s' "$RAW" | base64 -d > "$RUNNER_TEMP/tauri.key" 2>/dev/null \
+               && head -n1 "$RUNNER_TEMP/tauri.key" | grep -q '^untrusted comment:'; then
+            :
+          else
+            echo "❌ TAURI_SIGNING_PRIVATE_KEY 格式不对：需要两行文本且首行是 'untrusted comment:'" >&2
+            exit 1
+          fi
+          echo "✅ Tauri signing key prepared"
+
       - name: Build Tauri App (macOS)
         if: runner.os == 'macOS'
         env:
-          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
+          TAURI_SIGNING_PRIVATE_KEY_PATH: ${{ runner.temp }}/tauri.key
+          TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
         run: pnpm tauri build --target universal-apple-darwin
 
       - name: Build Tauri App (Windows)
         if: runner.os == 'Windows'
         env:
-          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
+          TAURI_SIGNING_PRIVATE_KEY_PATH: ${{ runner.temp }}/tauri.key
+          TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
         run: pnpm tauri build
 
       - name: Build Tauri App (Linux)
         if: runner.os == 'Linux'
         env:
-          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
+          TAURI_SIGNING_PRIVATE_KEY_PATH: ${{ runner.temp }}/tauri.key
+          TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
         run: pnpm tauri build
 
       - name: Prepare macOS Assets