ci: build Linux on ubuntu-24.04 for pipewire 0.10, add sidecar placeholders

libspa 0.10.0 needs pipewire headers newer than ubuntu-22.04 ships (0.3.48),
which broke both the release build and the new CI cargo check on Linux. Build
the Linux leg on ubuntu-24.04 (pipewire 1.x). Also create empty sidecar
placeholders before cargo check so tauri-build path validation passes on
Windows without downloading the real ffmpeg/STT binaries.

.github/workflows/check.yml

@@ -29,7 +29,7 @@ jobs:
           - platform: windows
             runner: windows-latest
           - platform: linux
-            runner: ubuntu-22.04
+            runner: ubuntu-24.04
 
     steps:
       - name: Checkout repository
@@ -54,6 +54,22 @@ jobs:
             libclang-dev \
             cmake
 
+      - name: Create sidecar placeholders
+        # tauri-build resolves the externalBin entries from tauri.conf.json and on
+        # Windows hard-errors if a `binaries/<name>-<target-triple>(.exe)` file is
+        # missing. `cargo check` does not bundle, so empty placeholders are enough to
+        # satisfy the existence check without downloading the real ffmpeg/STT sidecars.
+        shell: bash
+        run: |
+          TRIPLE=$(rustc -vV | sed -n 's/^host: //p')
+          EXT=""
+          if [ "$RUNNER_OS" = "Windows" ]; then EXT=".exe"; fi
+          mkdir -p src-tauri/binaries
+          for name in talkis-ffmpeg talkis-stt talkis-stt-nvidia talkis-stt-qwen talkis-diarize; do
+            : > "src-tauri/binaries/${name}-${TRIPLE}${EXT}"
+          done
+          ls -la src-tauri/binaries
+
       - name: Cache Rust build output
         uses: actions/cache@v4
         with:

.github/workflows/release.yml

@@ -30,7 +30,7 @@ jobs:
             release_script: build:release:windows
             updater_platform: windows-x86_64
           - platform: linux
-            runner: ubuntu-22.04
+            runner: ubuntu-24.04
             release_script: build:release:linux
             updater_platform: linux-x86_64