Upgrade Electron to a Node 24 runtime

.github/workflows/ci.yml

@@ -8,7 +8,8 @@ permissions:
 
 jobs:
   backend:
-    runs-on: ubuntu-latest
+    # Playwright 1.60 does not support the Ubuntu 26.04 latest runner.
+    runs-on: ubuntu-24.04
     timeout-minutes: 3
 
     steps:

.github/workflows/electron-release.yml

@@ -45,6 +45,7 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y \
+            clang-19 \
             libgtk-3-dev \
             libnotify-dev \
             libnss3 \
@@ -64,6 +65,8 @@ jobs:
             libpci3 \
             libappindicator3-1 \
             libsecret-1-0
+          echo 'CC=clang-19' >> "$GITHUB_ENV"
+          echo 'CXX=clang++-19' >> "$GITHUB_ENV"
 
       # Build frontend
       - name: Install frontend dependencies

electron/README.md

@@ -6,6 +6,7 @@ This directory contains the configuration to package ChatForge as a standalone E
 
 - Node.js 24+
 - NPM
+- On Linux, Clang 19 and the usual native build tools for rebuilding `better-sqlite3`.
 
 ## Setup
 
@@ -21,9 +22,12 @@ This directory contains the configuration to package ChatForge as a standalone E
 2.  **Install Electron Dependencies**:
     ```bash
     cd electron
-    npm install
+    # Linux: use the same compiler as the release build.
+    CC=clang-19 CXX=clang++-19 npm install
     ```
 
+    On Windows or macOS, use `npm install` without the Linux compiler variables.
+
 ## Running in Development
 
 To run the Electron app in development mode (using the local backend and frontend build):