feat(t-paliad-073): audit polish-2 DEFER list cleanup

Six findings from docs/audit-polish-2-2026-04-29.md DEFER list:

- F-23: hide STATUS column on /deadlines + /projects when every visible
  row shares the same status. Toggled at render time via a CSS class on
  the table; the column re-appears the moment filters re-introduce
  variety.
- F-32: agenda urgency pill now renders only when it disagrees with
  the day-bucket heading (e.g. an Überfällig deadline that lands in
  HEUTE through a filter quirk). Common case drops the redundant tag.
- F-38: bottom-nav agenda badge already counted overdue+today (the
  brief's option (b)); added a localized title + aria-label so the
  count's semantics ("X überfällig + Y heute fällig") is no longer
  ambiguous.
- F-40: glossary filter chips no longer mix EN+DE — DE shows
  "Streitsachen / Erteilungsverfahren / Allgemein", EN keeps
  "Litigation / Prosecution / General". Same i18n keys cover the
  Suggest-modal category dropdown.
- F-48: /projects/{id}/sub-projects now 301-redirects to the canonical
  /children URL via the existing redirects.go mechanism. Added a small
  redirects_test.go to lock the alias in.
- F-49: dropped the meta-circular 2026-04-22 "Neuigkeiten / What's New"
  changelog entry that referenced "this changelog" itself.

go build/vet/test clean, bun run build clean.

F-25 (mobile tables → card layout) is redesign-class and is scoped at
the bottom of the PR description as t-paliad-074, not implemented here.

frontend/src/client/projects.ts

@@ -148,12 +148,19 @@ function render() {
         <td><span class="akten-type-chip akten-type-${esc(p.type)}">${esc(typeLabel)}</span></td>
         <td class="akten-col-ref">${refCell}</td>
         <td class="akten-col-ref">${clientMatterCell}</td>
-        <td><span class="akten-status-chip akten-status-${esc(p.status)}">${esc(statusLabel)}</span></td>
+        <td class="akten-col-status"><span class="akten-status-chip akten-status-${esc(p.status)}">${esc(statusLabel)}</span></td>
         <td class="akten-col-updated">${fmtDate(p.updated_at)}</td>
       </tr>`;
     })
     .join("");
 
+  // F-23: when every visible row shares the same status, hide the column to
+  // cut redundant noise. The toggle re-runs on every filter change, so the
+  // column comes back as soon as the rows mix again.
+  const statusUnique = new Set(filtered.map((p) => p.status)).size;
+  const table = document.getElementById("akten-table");
+  table?.classList.toggle("akten-table--hide-status", statusUnique <= 1);
+
   tbody.querySelectorAll<HTMLTableRowElement>(".akten-row").forEach((row) => {
     row.addEventListener("click", () => {
       const id = row.dataset.id!;