feat(i18n): Aktions-Buttons dynamisch + komplettes Neue-Lage/Bearbeiten-Modal

- _updateRefreshButton + _updateArchiveButton (app.js) nutzen T() statt
  Hardcode -- Aktualisieren/Laeuft/Wiederherstellen/Archivieren/Lesemodus.
- Modal-Title-Setter (Lage bearbeiten / Neue Lage anlegen) lokalisiert
  an drei Stellen (init / openEdit / closeModal).
- updateVisibilityHint und toggleTypeDefaults: dynamischer Text via T().
- HTML: ~31 data-i18n + data-i18n-attr im modal-new (Art der Lage,
  Optionen, Type-Hint, Quellen-Toggles, Sichtbarkeit, Aktualisierung,
  Intervall-Einheiten, Aufbewahrung, E-Mail-Toggles, Abbrechen).
- Cache-Buster app.js auf v=20260514a.

src/static/i18n/en.json

@@ -17,6 +17,12 @@
   "action.export": "Export report",
   "action.archive": "Archive",
   "action.delete": "Delete",
+  "action.refreshing": "Running...",
+  "action.restore": "Restore",
+  "action.budget_exceeded": "Budget exhausted",
+  "action.read_only": "Read-only",
+  "action.budget_exceeded_title": "Token budget exhausted. Please contact administration.",
+  "action.read_only_title": "License does not permit write access",
   "sidebar.empty": "No situations yet",
   "header.logout": "Sign out",
   "header.new_incident": "+ New situation",
@@ -46,6 +52,37 @@
   "modal.new_incident.visibility_public": "Public",
   "modal.new_incident.visibility_private": "Private",
   "modal.new_incident.submit": "Create situation",
+  "modal.new_incident.title2": "Create new case",
+  "modal.new_incident.edit_title": "Edit situation",
+  "modal.placeholder.title": "e.g. Explosion in Madrid",
+  "modal.placeholder.description": "More details about the incident (optional)",
+  "modal.field.type": "Type of situation",
+  "modal.option.type_adhoc": "Live monitoring : track an event",
+  "modal.option.type_research": "Research : analyse a topic",
+  "modal.hint.type_adhoc": "Continuously searches hundreds of news sources for new articles. Recommended: automatic refresh.",
+  "modal.hint.type_research": "Structured deep research with multiple passes. Recommended: start manually and deepen when needed.",
+  "modal.field.sources": "Sources",
+  "modal.toggle.international": "Include international sources",
+  "modal.toggle.telegram": "Include Telegram channels",
+  "modal.toggle.visibility_public_text": "Public : visible to all users",
+  "modal.toggle.visibility_private_text": "Private : only visible to you",
+  "modal.field.refresh": "Refresh",
+  "modal.option.manual": "Manual",
+  "modal.option.auto": "Automatic",
+  "modal.field.interval": "Interval",
+  "modal.unit.minutes": "Minutes",
+  "modal.unit.hours": "Hours",
+  "modal.unit.days": "Days",
+  "modal.unit.weeks": "Weeks",
+  "modal.field.start_time": "First refresh at",
+  "modal.field.retention": "Retention (days)",
+  "modal.placeholder.retention": "0 = unlimited",
+  "modal.field.notifications": "Email notifications",
+  "modal.hint.notifications": "Notify me by email about:",
+  "modal.notify.summary": "New briefing",
+  "modal.notify.new_articles": "New articles",
+  "modal.notify.status_change": "Fact-check status change",
+  "aria.close": "Close",
   "modal.sources.title": "Source management",
   "modal.sources.approve_all_high": "Approve all ≥ 0.85",
   "modal.export.title": "Export report",