fix: codesign app with correct identifier for macOS permissions

Without explicit codesigning, the app registers as "Electron" in macOS
privacy settings instead of "SillyAgent", causing permission grants to
not take effect. Add ad-hoc codesign step to build script and a restart
hint to the permission modal for Screen Recording.

Made-with: Cursor

Author: wanming

build-electron.sh

@@ -228,13 +228,14 @@ cd "$FRONTEND_DIR"
 echo -e "${YELLOW}Running electron-builder...${NC}"
 npx electron-builder --mac
 
-# Clear quarantine attributes from the built app to prevent App Translocation issues
-# This helps with the "overlay install" problem where the app won't start if installed over an existing version
-echo -e "${YELLOW}Clearing quarantine attributes...${NC}"
+# Ad-hoc codesign with correct identifier so macOS registers permissions
+# under "SillyAgent" instead of generic "Electron"
+echo -e "${YELLOW}Code-signing app with correct identifier...${NC}"
 APP_PATH=$(find "$FRONTEND_DIR/dist-electron" -name "*.app" -type d | head -1)
 if [ -n "$APP_PATH" ]; then
+    codesign --force --deep --sign - --identifier com.sillyagent.app "$APP_PATH"
     xattr -cr "$APP_PATH" 2>/dev/null || true
-    echo -e "${GREEN}Quarantine attributes cleared from: $(basename "$APP_PATH")${NC}"
+    echo -e "${GREEN}Signed and cleared quarantine: $(basename "$APP_PATH")${NC}"
 fi
 
 # Calculate build time

frontend/components/permission-modal.tsx

@@ -139,6 +139,9 @@ export function PermissionModal({ onPermissionsGranted }: PermissionModalProps)
           <p className="text-xs text-muted-foreground/60">
             If SillyAgent is not listed, click the "+" button to add it manually.
           </p>
+          <p className="text-xs text-muted-foreground/60">
+            Screen Recording permission requires restarting the app after granting.
+          </p>
         </div>
       </DialogContent>
     </Dialog>