Adjust Linux wallpaper test mode

dist/main/system_handlers.js

@@ -221,18 +221,41 @@ function registerSystemHandlers() {
             }
         }
         if (os.platform() === 'linux') {
-            let img_path = imagePath ? (0, file_utils_1.expandPath)(imagePath) : null;
+            // Dev test mode: never touch the desktop on Linux. Running gsettings during
-            if (!img_path && url) {
+            // development would reset the dev workstation monitors on every test cycle.
-                const result = await download_wallpaper_image(url, 'wallpaper_primary');
+            // Return what would have run so the Svelte side can show a debug popup.
-                if (!result.success || !result.path)
+            const would_run = [];
-                    return { success: false, error: result.error };
+            const cache_dir = wallpaper_cache_dir;
-                img_path = result.path;
+            if (!imagePath && !url && !url_external) {
-            }
-            if (!img_path)
                 return { success: false, error: 'No image source provided' };
-            if (!fs.existsSync(img_path))
+            }
-                return { success: false, error: 'Image file not found' };
+            if (imagePath) {
-            return await runExec(`gsettings set org.gnome.desktop.background picture-uri "file://${img_path}"`);
+                const clean = (0, file_utils_1.expandPath)(imagePath);
+                if (!fs.existsSync(clean))
+                    return { success: false, error: 'Image file not found' };
+            }
+            if (url)
+                would_run.push(`download: ${url}\n  → ${path.join(cache_dir, 'wallpaper_primary.jpg')}`);
+            if (url_external)
+                would_run.push(`download: ${url_external}\n  → ${path.join(cache_dir, 'wallpaper_external.jpg')}`);
+            if (imagePath) {
+                would_run.push(`gsettings set org.gnome.desktop.background picture-uri "file://${(0, file_utils_1.expandPath)(imagePath)}"`);
+            }
+            else if (url) {
+                would_run.push(`gsettings set org.gnome.desktop.background picture-uri "file://${path.join(cache_dir, 'wallpaper_primary.jpg')}"`);
+            }
+            if (url_external) {
+                would_run.push(`(external display: gsettings has no per-display wallpaper support)`);
+            }
+            return {
+                success: true,
+                linux_test_mode: true,
+                platform: 'linux',
+                display,
+                url: url ?? null,
+                url_external: url_external ?? null,
+                would_run
+            };
         }
         return { success: false, error: 'Platform not supported' };
     });

src/main/system_handlers.ts

@@ -177,18 +177,42 @@ export function registerSystemHandlers() {
     }
 
     if (os.platform() === 'linux') {
-      let img_path: string | null = imagePath ? expandPath(imagePath) : null;
+      // Dev test mode: never touch the desktop on Linux. Running gsettings during
+      // development would reset the dev workstation monitors on every test cycle.
+      // Return what would have run so the Svelte side can show a debug popup.
+      const would_run: string[] = [];
+      const cache_dir = wallpaper_cache_dir;
 
-      if (!img_path && url) {
+      if (!imagePath && !url && !url_external) {
-        const result = await download_wallpaper_image(url, 'wallpaper_primary');
+        return { success: false, error: 'No image source provided' };
-        if (!result.success || !result.path) return { success: false, error: result.error };
-        img_path = result.path;
       }
 
-      if (!img_path) return { success: false, error: 'No image source provided' };
+      if (imagePath) {
-      if (!fs.existsSync(img_path)) return { success: false, error: 'Image file not found' };
+        const clean = expandPath(imagePath);
+        if (!fs.existsSync(clean)) return { success: false, error: 'Image file not found' };
+      }
 
-      return await runExec(`gsettings set org.gnome.desktop.background picture-uri "file://${img_path}"`);
+      if (url) would_run.push(`download: ${url}\n  → ${path.join(cache_dir, 'wallpaper_primary.jpg')}`);
+      if (url_external) would_run.push(`download: ${url_external}\n  → ${path.join(cache_dir, 'wallpaper_external.jpg')}`);
+
+      if (imagePath) {
+        would_run.push(`gsettings set org.gnome.desktop.background picture-uri "file://${expandPath(imagePath)}"`);
+      } else if (url) {
+        would_run.push(`gsettings set org.gnome.desktop.background picture-uri "file://${path.join(cache_dir, 'wallpaper_primary.jpg')}"`);
+      }
+      if (url_external) {
+        would_run.push(`(external display: gsettings has no per-display wallpaper support)`);
+      }
+
+      return {
+        success: true,
+        linux_test_mode: true,
+        platform: 'linux',
+        display,
+        url: url ?? null,
+        url_external: url_external ?? null,
+        would_run
+      };
     }
 
     return { success: false, error: 'Platform not supported' };