feat(i18n): Progress-Popup + Pipeline-Stati lokalisieren

- components._getStepLabel und progress-popup-title nutzen T()
  fuer Erste Recherche laeuft / Aktualisierung laeuft / In Warteschlange
  / Wird abgebrochen.
- pipeline._formatHeader / _relativeTime / _formatCount lokalisiert:
  Status-Texte (erledigt/laeuft/Fehler), Zeitangaben (gerade eben,
  vor X Min/Std/Tagen), Aktualisierung-laeuft-Header.
- dashboard.html: data-i18n auf pipeline-empty, progress-popup-title,
  progress-check-label (4 Stueck).
- Cache-Buster fuer components.js + pipeline.js auf v=20260513d.

src/static/i18n/en.json

@@ -65,5 +65,40 @@
   "refresh.no_developments": "No new developments",
   "refresh.new_articles_suffix": "new articles",
   "refresh.confirmed_suffix": "facts confirmed",
-  "refresh.contradicted_suffix": "contradicted"
+  "refresh.contradicted_suffix": "contradicted",
+  "progress.status.queued": "Queued",
+  "progress.status.researching": "Researching...",
+  "progress.status.deep_researching": "Deep research...",
+  "progress.status.analyzing": "Analyzing...",
+  "progress.status.factchecking": "Fact-checking...",
+  "progress.status.cancelling": "Cancelling...",
+  "progress.title.first_refresh": "Initial research running",
+  "progress.title.refresh": "Refresh running",
+  "progress.title.queued": "Queued",
+  "progress.title.cancelling": "Cancelling…",
+  "progress.factcheck_running": "Fact-check running",
+  "progress.check.researching": "Searching sources",
+  "progress.check.analyzing": "Analyzing articles",
+  "pipeline.empty": "Never refreshed. Start the first refresh.",
+  "pipeline.load_failed": "Failed to load pipeline",
+  "pipeline.running": "Refresh running...",
+  "pipeline.cancelled": "cancelled",
+  "pipeline.with_errors": "finished with errors",
+  "pipeline.duration_prefix": "Duration:",
+  "pipeline.status.done": "done",
+  "pipeline.status.running": "running...",
+  "pipeline.status.error": "error",
+  "pipeline.count.sources_reviewed": "{n} sources checked",
+  "pipeline.count.collected": "{n} articles",
+  "pipeline.count.collected_from": "{n} articles from {s} sources",
+  "time.just_now": "just now",
+  "time.minutes_ago": "{n} min ago",
+  "time.hours_ago": "{n}h ago",
+  "time.days_ago": "{n} days ago",
+  "time.day_ago": "1 day ago",
+  "toast.incident_refreshed": "Situation refreshed.",
+  "toast.data_refreshed": "Data refreshed.",
+  "toast.source_updated": "Source updated.",
+  "toast.session_expires": "Session expires in {min} minute(s). Please sign in again.",
+  "confirm.delete_incident": "Really delete this situation? All collected data will be lost."
 }