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/WorkspaceView.tsx

@@ -52,6 +52,7 @@ import { UnifiedShareModal } from '../../components/UnifiedShareModal';
 import { sendDocOps } from '../../lib/docSync/oneoff';
 import { useMobileActions } from '../../context/MobileActionContext';
 import { DocumentEditor, DocSaveStatus } from './DocumentEditor';
+import { extractHashtags } from '../../lib/hashtags';
 
 interface WorkspaceViewProps {
   currentUser?: User | null;
@@ -289,12 +290,8 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
     const tagMap = new Map<string, number>();
     for (const d of docs) {
       for (const b of d.blocks || []) {
-        const matches = b.content?.match(/#([a-zA-Z0-9äöüÄÖÜß_-]+)/g);
-        if (matches) {
-          for (const m of matches) {
-            const clean = m.slice(1).toLowerCase();
-            tagMap.set(clean, (tagMap.get(clean) || 0) + 1);
-          }
+        for (const clean of extractHashtags(b.content)) {
+          tagMap.set(clean, (tagMap.get(clean) || 0) + 1);
         }
       }
     }
@@ -1117,8 +1114,8 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
     <div className="w-full space-y-3">
       {/* Top Header: Workspace Tabs & Actions */}
       <div className="flex flex-wrap items-center justify-between gap-2 border-b border-border pb-2">
-        {/* Workspace selector tabs & left sidebar toggle */}
-        <div className="flex flex-wrap items-center gap-1">
+        {/* Workspace selector tabs & left sidebar toggle; on phones the three tabs share the full width */}
+        <div className="grid grid-cols-3 w-full gap-1 sm:flex sm:flex-wrap sm:items-center sm:w-auto">
           <button
             type="button"
             disabled={subView !== 'editor'}
@@ -1155,7 +1152,7 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
           <button
             type="button"
             onClick={() => setSubView('editor')}
-            className={`h-8 px-3 text-xs font-medium border rounded-btn transition-colors flex items-center gap-1.5 cursor-pointer ${
+            className={`h-8 px-2 sm:px-3 text-xs font-medium border rounded-btn transition-colors flex items-center justify-center gap-1.5 cursor-pointer min-w-0 ${
               subView === 'editor'
                 ? 'bg-panel border-accent text-main'
                 : 'bg-canvas border-border text-muted hover:text-main'
@@ -1172,7 +1169,7 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
               setSubView('todos');
               setMobileShowDetail(true);
             }}
-            className={`h-8 px-3 text-xs font-medium border rounded-btn transition-colors flex items-center gap-1.5 cursor-pointer ${
+            className={`h-8 px-2 sm:px-3 text-xs font-medium border rounded-btn transition-colors flex items-center justify-center gap-1.5 cursor-pointer min-w-0 ${
               subView === 'todos'
                 ? 'bg-panel border-accent text-main'
                 : 'bg-canvas border-border text-muted hover:text-main'
@@ -1189,7 +1186,7 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
               setSubView('tags');
               setMobileShowDetail(true);
             }}
-            className={`h-8 px-3 text-xs font-medium border rounded-btn transition-colors flex items-center gap-1.5 cursor-pointer ${
+            className={`h-8 px-2 sm:px-3 text-xs font-medium border rounded-btn transition-colors flex items-center justify-center gap-1.5 cursor-pointer min-w-0 ${
               subView === 'tags' || subView === 'tag_detail'
                 ? 'bg-panel border-accent text-main'
                 : 'bg-canvas border-border text-muted hover:text-main'
@@ -1201,8 +1198,8 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
           </button>
         </div>
 
-        {/* Right Header Section: Save Status & Live Collaboration Button */}
-        <div className="flex items-center gap-2">
+        {/* Right Header Section: Save Status (on phones it sits compactly in the note's own header) */}
+        <div className="hidden sm:flex items-center gap-2">
           {subView === 'editor' && selectedDocId ? (
             /* Save Status Pill */
             <div
@@ -1272,7 +1269,8 @@ export const WorkspaceView: React.FC<WorkspaceViewProps> = ({
               <h2 className="text-xs font-bold text-main uppercase tracking-wider">
                 Notizen & Outliner
               </h2>
-              <div className="flex items-center gap-1">
+              {/* On phones these are in the menu at the top (and the + button), so not repeated here */}
+              <div className="hidden sm:flex items-center gap-1">
                 <button
                   type="button"
                   onClick={(e) => handleOpenNewFolder('', e)}