Add the news report model, markers and source

The pure half of a news layer: validated records for a news server's
`/api/news/hotspots|feed|outline` contract, a presentation model and canvas
markers and picture cards, and a fetch client.

- Colour carries severity only (0 no physical event, 1 minor, 2 significant,
  3 major), never a side; the category is the icon, the rim is attestation
  (confirmed, a claim, one side's own press), size grows with sources and
  markers fade with age.
- Cards say "Reported by {side} sources" and mark official channels; a
  machine-read English headline is labelled as such.
- `createNewsSource` reads same-origin routes with a 15 s timeout, a 4 MiB cap
  and record-by-record validation; `NEWS_API_PATHS` and `newsQueryAllowed`
  let a host proxy exactly what the client sends. A 503 marked unavailable
  means "not configured": no retries.
- Exported as `./layers/news/source`, with its own package boundary.

src/i18n/locales/de.json

@@ -1,4 +1,56 @@
 {
+  "News feed unavailable": "Nachrichtenfeed nicht verfügbar",
+  "Disputed: {name}": "Umstritten: {name}",
+  "Administered by {holder} · claimed by {claimant}": "Verwaltet von {holder} · beansprucht von {claimant}",
+  "Self-administered · claimed by {claimant}": "Selbstverwaltet · beansprucht von {claimant}",
+  "UN-patrolled zone": "Von der UNO überwachte Zone",
+  "Claimed by neither neighbour": "Von keinem Nachbarn beansprucht",
+  "Video": "Video",
+  "Photos": "Fotos",
+  "Claimed by {who}": "Behauptet von {who}",
+  "Claimed": "Behauptung",
+  "Not yet confirmed by others": "Noch nicht von anderen bestätigt",
+  "Reported by {side} sources": "Gemeldet von Quellen aus {side}",
+  "Reported by {sides}": "Gemeldet von {sides}",
+  "{side} sources": "Quellen aus {side}",
+  "Official": "Offiziell",
+  "Reported by both sides": "Von beiden Seiten gemeldet",
+  "Independently reported": "Unabhängig gemeldet",
+  "Single source": "Einzelne Quelle",
+  "International": "International",
+  "Independent": "Unabhängig",
+  "Unattributed": "Ohne Zuordnung",
+  "Outside party": "Außenstehende Partei",
+  "Ukraine–Russia": "Ukraine–Russland",
+  "Israel–Gaza–Lebanon": "Israel–Gaza–Libanon",
+  "Iran–Hormuz": "Iran–Hormus",
+  "Yemen–Red Sea": "Jemen–Rotes Meer",
+  "Sudan": "Sudan",
+  "Sahel": "Sahel",
+  "Elsewhere": "Anderswo",
+  "Strike": "Angriff",
+  "Alert": "Warnung",
+  "Air defence": "Luftabwehr",
+  "Ground fighting": "Bodenkämpfe",
+  "Casualties": "Opfer",
+  "Humanitarian": "Humanitär",
+  "Disaster": "Katastrophe",
+  "Protest": "Protest",
+  "Political": "Politik",
+  "No physical event": "Kein physisches Ereignis",
+  "Minor incident": "Kleiner Vorfall",
+  "Significant": "Erheblich",
+  "Major": "Schwer",
+  "age|now": "jetzt",
+  "{minutes} min": "{minutes} Min.",
+  "{hours} h": "{hours} Std.",
+  "{count} sources": {
+    "one": "{count} Quelle",
+    "other": "{count} Quellen"
+  },
+  "News feed not configured on this server": "Nachrichtenfeed auf diesem Server nicht eingerichtet",
+  "Malformed news hotspots response": "Fehlerhafte Antwort zu Nachrichten-Brennpunkten",
+  "Malformed news feed response": "Fehlerhafte Antwort des Nachrichtenfeeds",
   "Flying to Austin, TX...": "Flug nach Austin, TX...",
   "Restoring shared view...": "Geteilte Ansicht wird wiederhergestellt...",
   "Configuring viewer...": "Viewer wird konfiguriert...",