Frontend redesign chunk 3: type layer honesty and the duplicate fix

Declare the fields the backend already writes and the UI was discarding:
CallRecord gains location_coords, units, vehicles, cleared_units,
duplicate_of, srcaddr (intelligence.py ~315-327); IncidentRecord gains
units_active, units_cleared, location_mentions, last_thin_at
(incident_correlator.py _attach, ~1270-1300).

Filter duplicate_of client-side in useCalls.ts's three hooks (useCalls,
useCallsByIncident, useActiveCalls) so a call flagged as a second node's
recording of the same transmission no longer renders twice. Client-side
rather than a where() clause to avoid a new composite index.

Removes the two now-resolved DEFERRED.md entries (dedup/useCalls,
lib/types.ts field gaps).

Per UI_REDESIGN.md chunk 3.

drb-frontend/lib/types.ts

@@ -109,6 +109,17 @@ export interface CallRecord {
   /** Legacy field — present on calls recorded before the multi-scene migration. */
   incident_id?: string | null;
   location: string | null;
+  /** Per-call geocode, written by intelligence.py. Powers the incident-path polyline on the map. */
+  location_coords?: { lat: number; lng: number } | null;
+  /** Unit callsigns mentioned in this specific transmission (e.g. "15-9", "E-41"). */
+  units?: string[];
+  vehicles?: string[];
+  /** Units this call reported as clearing/back in service. */
+  cleared_units?: string[];
+  /** Set when dedup.py identifies this as a second node's recording of the same transmission — the canonical copy has this null. */
+  duplicate_of?: string | null;
+  /** Radio source address, when the system exposes it. */
+  srcaddr?: string | null;
   tags: string[];
   status: "active" | "ended";
   /** Four-level ladder: routine | minor | moderate | major. Legacy docs may still carry "unknown". */
@@ -134,6 +145,14 @@ export interface IncidentRecord {
   talkgroup_ids: string[];
   units: string[];
   vehicles: string[];
+  /** Units currently believed on scene — maintained by incident_correlator.py `_attach`. */
+  units_active?: string[];
+  /** Units that reported clearing/back in service on this incident. */
+  units_cleared?: string[];
+  /** Free-text location mentions accumulated across the incident's calls, beyond the primary `location`. */
+  location_mentions?: string[];
+  /** ISO timestamp of the last thin/status-only call attached (doesn't refresh `updated_at`). */
+  last_thin_at?: string | null;
   severity: string | null;
   started_at: string;
   updated_at: string;