feat(mobile): declutter mobile views with contextual FAB, filter sheet, and clean outliner

frontend/src/App.tsx

@@ -132,11 +132,12 @@ export const App: React.FC = () => {
   // Mobile Navigation & Quick-Action State
   const [showMobileCapture, setShowMobileCapture] = useState(false);
   const [showMobileProfile, setShowMobileProfile] = useState(false);
-  const { isMenuOpen, setIsMenuOpen, closeMenu, setGroups } = useMobileActions();
+  const { isMenuOpen, setIsMenuOpen, closeMenu, setGroups, primaryAction, setPrimaryAction } = useMobileActions();
 
   useEffect(() => {
     closeMenu();
     if (activeTab === 'triage') {
+      setPrimaryAction(() => setShowMobileCapture(true));
       setGroups([
         {
           id: 'triage-actions',
@@ -966,7 +967,11 @@ export const App: React.FC = () => {
             type="button"
             onClick={() => {
               triggerHaptic(15);
-              setShowMobileCapture(true);
+              if (primaryAction) {
+                primaryAction();
+              } else {
+                setShowMobileCapture(true);
+              }
             }}
             className="w-14 h-14 -mt-6 rounded-full bg-accent text-on-accent shadow-lg flex items-center justify-center active:scale-90 transition-transform border-4 border-panel cursor-pointer"
             title="Schnell erfassen (+)"