Enhance Tauri build process for Linux by adding environment variable configurations

- Updated the GitHub Actions workflow to verify the existence of the standalone binary and fallback to a standard build if not found, improving build reliability.
- Added environment variable settings in the Rust code to address rendering issues on Linux, specifically targeting WebKit configurations to prevent EGL errors and improve stability.

These changes enhance the build process and ensure better performance of the Tauri application on Linux systems.

Author: Firstp1ck

.github/workflows/release.yml

@@ -123,7 +123,14 @@ jobs:
 
       - name: Build Tauri app
         working-directory: frontend
-        run: bunx tauri build --bundles deb,rpm,appimage
+        run: |
+          # Build bundles (this also builds the standalone binary)
+          bunx tauri build --bundles deb,rpm,appimage
+          # Verify the standalone binary exists
+          if [ ! -f "src-tauri/target/release/budget-planer" ]; then
+            echo "::error::Standalone binary not found, building without bundles..."
+            bunx tauri build
+          fi
         # Optional: Set these secrets in GitHub Settings → Secrets for code signing
         # If not set, Tauri will build without signing (linter warnings are expected)
         env:

frontend/src-tauri/src/lib.rs

@@ -887,6 +887,32 @@ fn start_backend_server(
 
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
+  // Fix grey window issue on Linux by setting WebKit environment variables
+  // This disables problematic rendering features that cause EGL errors
+  #[cfg(target_os = "linux")]
+  {
+    use std::env;
+    // Disable DMABUF renderer to fix EGL_BAD_PARAMETER errors
+    // Safety: Setting environment variables is safe in single-threaded context before Tauri starts
+    if env::var("WEBKIT_DISABLE_DMABUF_RENDERER").is_err() {
+      unsafe {
+        env::set_var("WEBKIT_DISABLE_DMABUF_RENDERER", "1");
+      }
+    }
+    // Disable compositing mode to avoid rendering issues
+    if env::var("WEBKIT_DISABLE_COMPOSITING_MODE").is_err() {
+      unsafe {
+        env::set_var("WEBKIT_DISABLE_COMPOSITING_MODE", "1");
+      }
+    }
+    // Force X11 backend if on Wayland (more stable for WebKit)
+    if env::var("GDK_BACKEND").is_err() && env::var("WAYLAND_DISPLAY").is_ok() {
+      unsafe {
+        env::set_var("GDK_BACKEND", "x11");
+      }
+    }
+  }
+  
   // Store backend process handle in app state
   let backend_process: Mutex<Option<Child>> = Mutex::new(None);