ui: live timers, Berlin timestamps, ZIP failure reports, drop kill-switch/Fehler tab

* remove the kill-switch: auto-apply toggle is the single on/off; manual
  'Bewerben' button now only gated by apply reachability; circuit breaker
  stays but only gates auto-apply (manual bypasses, so a user can retry)
* Berlin-timezone date filter (de_dt) formats timestamps as DD.MM.YYYY HH:MM
  everywhere; storage stays UTC
* Wohnungen: live 'entdeckt vor X' on every flat + 'nächste Aktualisierung in Xs'
  countdown in the header, driven by /static/app.js; HTMX polls body every 30s
* drop the Fehler tab entirely; failed applications now carry a
  'Fehler-Report herunterladen (ZIP)' link -> /bewerbungen/{id}/report.zip
  bundles application.json, flat.json, profile_snapshot.json, forensics.json,
  step_log.txt, page.html, console/errors/network JSONs, and decoded
  screenshots/*.jpg for AI-assisted debugging
* trim the 'sensibel' blurb from the Profil tab

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

web/templates/logs.html

@@ -6,7 +6,7 @@
     <div class="divide-y divide-soft">
         {% for e in events %}
         <div class="px-4 py-2 mono">
-            <span class="text-slate-500">{{ e.timestamp }}</span>
+            <span class="text-slate-500">{{ e.timestamp|de_dt }}</span>
             <span class="text-slate-400">{{ e.actor }}</span>
             <span class="text-slate-700">{{ e.action }}</span>
             {% if e.details %}<span class="text-slate-500">— {{ e.details }}</span>{% endif %}