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>

internal/storage/docsync_test.go

@@ -406,3 +406,22 @@ func TestDemoAccountsGetSampleDataAndShares(t *testing.T) {
 		t.Fatalf("restart seeded again: %d notes", docs)
 	}
 }
+
+func TestAnchorTagMigrationKeepsRealTags(t *testing.T) {
+	s, u := newSyncTestStore(t)
+	th, err := s.CreateThought(u.ID, "Lesen: example.com/blog#ueberschrift #lesen", "normal", "manual", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(th.Tags) != 1 || th.Tags[0] != "lesen" {
+		t.Fatalf("new thoughts must not get anchor tags: %v", th.Tags)
+	}
+	// State before the rule change: anchor stored as tag, plus a tag added by hand
+	s.db.Exec(`UPDATE thoughts SET tags = '["ueberschrift","lesen","manuell"]' WHERE id = ?`, th.ID)
+	s.db.Exec(`DELETE FROM system_settings WHERE key = ?`, tagsAnchorMigrationKey)
+	s.migrateAnchorTags()
+	got, _ := s.GetThoughtByID(u.ID, th.ID)
+	if len(got.Tags) != 2 || got.Tags[0] != "lesen" || got.Tags[1] != "manuell" {
+		t.Fatalf("only the anchor tag must go: %v", got.Tags)
+	}
+}