Tighten datasheet model matching and keep given fields of view

Codec, product and resolution words never identify a model; generation suffixes such as Mk II no longer fall back to the base model; a mismatched manufacturer never matches, and brand-only numeric names need the brand. The datasheet FOV only fills when the source and seed give none and the pose is not curated, and DATASHEET is shown only while no calibration offset applies. Adds the CC0 extract to DATA_SOURCES.

src/layers/cctv/presentation.js

@@ -1,7 +1,11 @@
 import { CCTV_AMBIENT_CARD_MAX } from '../../data/cctvLod.js';
 import { ACTIVE_FRAME_REFRESH_MS, IDLE_FRAME_REFRESH_MS } from './policy.js';
 import { headingHudToken, isHeadingEstimated } from './headingConfidence.js';
-import { specSummary, specFovCapabilityToken } from './modelSpecs.js';
+import {
+  specSummary,
+  specFovCapabilityToken,
+  isDatasheetFov,
+} from './modelSpecs.js';
 
 export function createPresentation({
   state: layerState,
@@ -40,8 +44,9 @@ export function createPresentation({
       // A synthetic bearing (headingConfidence 'low', no human calibration)
       // is tagged so a hashed guess never reads as a surveyed facing (#639).
       headingHudToken(active.camera),
-      // Identified hardware labels its FOV as datasheet-sourced (catalog.js).
-      `FOV ${Math.round(active.camera.fovDeg)}°${active.camera.fovSource === 'datasheet' ? ' (DATASHEET)' : ''}`,
+      // Identified hardware labels its FOV as datasheet-sourced (catalog.js)
+      // only while no manual calibration offset has moved it.
+      `FOV ${Math.round(active.camera.fovDeg)}°${isDatasheetFov(active.camera) ? ' (DATASHEET)' : ''}`,
       // A PTZ/varifocal datasheet range is what the lens can do, not its
       // current zoom, so it is shown beside the estimate, never as it.
       specFovCapabilityToken(active.camera),
@@ -96,7 +101,11 @@ export function createPresentation({
       pitchDeg: camera.pitchDeg,
       fovDeg: camera.fovDeg,
       // Identified-hardware enrichment passthrough (catalog.js / modelSpecs.js).
-      fovSource: camera.fovSource || 'estimated',
+      fovSource: isDatasheetFov(camera)
+        ? 'datasheet'
+        : camera.fovSource === 'datasheet'
+          ? 'calibrated'
+          : camera.fovSource || 'estimated',
       specFovMinDeg: camera.specFovMinDeg ?? null,
       specFovMaxDeg: camera.specFovMaxDeg ?? null,
       spec: camera.spec || null,