fix: mobile layout, task clicks, list tab corners, hashtags in URLs

Mobile
- Plus button in triage did nothing: the stored action returned the
  capture function instead of calling it
- Workspace: tabs share the full width; save status sits as an icon next
  to the note title instead of wrapping into its own row; "Neue Notiz" /
  "Neuer Ordner" only in the top menu (and +), not repeated in the list
- Outliner fields measured while hidden stayed one line high (cut-off
  callout); they are measured again when their width changes
- Task dialog: scrolls in a div instead of a fieldset, height in dvh,
  notes editor grows with its text, so long notes are fully reachable

Desktop
- Delete button of the selected task/shopping list sits inside the tab as
  its own rounded button (matches rounded themes like Soft)

Both
- Tasks sometimes did not open: every reload after an action replaced the
  list with a loading placeholder, swallowing clicks; reloads are now
  silent after the first load of a list, stale responses are dropped
- Hashtags need whitespace or "(" before "#", so URL anchors are no
  longer tags (server, browser); one-time cleanup of stored anchor tags

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/features/workspace/DocumentEditor.tsx

@@ -14,11 +14,15 @@ import {
   Sparkles,
   Plus,
   Search,
+  Check,
+  CloudOff,
+  AlertTriangle,
 } from 'lucide-react';
 import { Document, DocumentBlock, User } from '../../lib/types';
 import { api } from '../../lib/api';
 import { DocSyncEngine, EngineState } from '../../lib/docSync/engine';
 import { OutlinerTree, OutlinerTreeHandle } from './OutlinerTree';
+import { extractHashtags } from '../../lib/hashtags';
 
 export type DocSaveStatus = 'saved' | 'saving' | 'unsaved' | 'error';
 
@@ -314,12 +318,7 @@ export const DocumentEditor: React.FC<DocumentEditorProps> = ({
   const extractedTags = useMemo(() => {
     const tagSet = new Set<string>();
     for (const b of blocks) {
-      const matches = b.content?.match(/#([a-zA-Z0-9äöüÄÖÜß_-]+)/g);
-      if (matches) {
-        for (const m of matches) {
-          tagSet.add(m.slice(1).toLowerCase());
-        }
-      }
+      for (const tag of extractHashtags(b.content)) tagSet.add(tag);
     }
     return Array.from(tagSet);
   }, [blocks]);
@@ -755,6 +754,33 @@ export const DocumentEditor: React.FC<DocumentEditorProps> = ({
             </div>
           )}
 
+          {/* Save status on phones (the desktop shows it above the workspace) */}
+          {engineState && (
+            <span
+              className="sm:hidden inline-flex items-center shrink-0"
+              title={
+                engineState.status === 'saving'
+                  ? 'Speichert…'
+                  : engineState.status === 'offline'
+                  ? 'Offline – Änderungen sind lokal gesichert'
+                  : engineState.status === 'error'
+                  ? engineState.errorMessage || 'Fehler beim Speichern'
+                  : 'Gespeichert'
+              }
+              aria-label="Speicherstatus"
+            >
+              {engineState.status === 'saving' ? (
+                <Loader2 className="w-3.5 h-3.5 animate-spin text-accent" />
+              ) : engineState.status === 'offline' ? (
+                <CloudOff className="w-3.5 h-3.5 text-status-warn" />
+              ) : engineState.status === 'error' ? (
+                <AlertTriangle className="w-3.5 h-3.5 text-status-err" />
+              ) : (
+                <Check className="w-3.5 h-3.5 text-status-ok" />
+              )}
+            </span>
+          )}
+
           {/* Read-only indicator */}
           {!canEdit && (
             <span className="inline-flex items-center gap-1 px-2 py-0.5 rounded-btn text-[11px] font-medium bg-status-warn/10 text-status-warn border border-status-warn/30">