fix(cctv): keep estimated FOV for PTZ/varifocal hardware; carry datasheet range as capability

A PTZ/varifocal datasheet FOV is a capability range, not the lens's
current zoom, so replacing the frustum's estimate with its wide end
presented unknown optical state as known. Parse the full horizontal
range (ignoring vertical, "combined" panoramic and lens-note figures),
carry it as specFovMinDeg/specFovMaxDeg, and substitute the datasheet
FOV only for fixed single-lens hardware. The HUD labels the range as
capability beside the estimate. This also stops the Q6000-E Mk II's
"360 combined" figure from being read as a 360-degree lens.

src/layers/cctv/presentation.js

@@ -1,7 +1,7 @@
 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 } from './modelSpecs.js';
+import { specSummary, specFovCapabilityToken } from './modelSpecs.js';
 
 export function createPresentation({
   state: layerState,
@@ -42,6 +42,9 @@ export function createPresentation({
       headingHudToken(active.camera),
       // Identified hardware labels its FOV as datasheet-sourced (catalog.js).
       `FOV ${Math.round(active.camera.fovDeg)}°${active.camera.fovSource === 'datasheet' ? ' (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),
       `COVERAGE ${area.toFixed(2)}km²`,
       overlapCount > 0 ? `OVERLAP ${overlapCount} cams` : 'ISOLATED VIEW',
       `PROJ ${layerState._showProjection ? 'MONITOR' : 'OFF'}`,
@@ -94,6 +97,8 @@ export function createPresentation({
       fovDeg: camera.fovDeg,
       // Identified-hardware enrichment passthrough (catalog.js / modelSpecs.js).
       fovSource: camera.fovSource || 'estimated',
+      specFovMinDeg: camera.specFovMinDeg ?? null,
+      specFovMaxDeg: camera.specFovMaxDeg ?? null,
       spec: camera.spec || null,
       rangeM: camera.rangeM,
       elevationM: camera.absoluteHeightM,