Update worklog: Phase 11 - Architecture audit, i18n, UX fixes complete

Summary of all changes in this phase:
- 13 commits pushed to GitHub
- 4 orphan files deleted (-1008 lines dead code)
- 3 duplicate nav entries removed
- 92 orphaned i18n keys removed
- 6 broken API calls fixed
- All emojis removed from UI code
- 44px touch targets + reduced-motion CSS added
- All hardcoded English strings translated to German
- PWA/onboarding/WebSocket UX issues fixed
- AI Studio with SnapGen/Perchance integration added
- Calendar filter tabs + grading analytics view added

src/components/subjects-view.tsx

@@ -2492,7 +2492,7 @@ export default function SubjectsView() {
               <Input
                 value={changeRequestForm.title}
                 onChange={(e) => setChangeRequestForm({ ...changeRequestForm, title: e.target.value })}
-                placeholder="Title of the change request"
+                placeholder="Titel der Änderungsanfrage"
                 className="mt-1"
               />
             </div>
@@ -2501,7 +2501,7 @@ export default function SubjectsView() {
               <Textarea
                 value={changeRequestForm.description}
                 onChange={(e) => setChangeRequestForm({ ...changeRequestForm, description: e.target.value })}
-                placeholder="Describe the requested change..."
+                placeholder="Beschreiben Sie die gewünschte Änderung..."
                 className="mt-1"
                 rows={3}
               />