Complete phase 3 W1 acceptance and close T16 findings

Fix Navara model display tint, overlay ordering, follow gestures and resource cleanup.
Reduce repeated aircraft work and correct fixture enrichment responses.
Strengthen dev/preview QA, preserve failure history and document verified W1 results.

Validation: 7171 ordinary tests pass, one Windows-only skip; 15 allocation probes;
37 W1 acceptance steps; contracts, shell, four performance gates; 18 identical
Cesium baseline PNGs. Known pre-existing CCTV and live-source limits are recorded.

scripts/qa-perf.mjs

@@ -102,6 +102,7 @@ const browser = await puppeteer.launch({
   headless: 'new',
   protocolTimeout: 300_000,
   args: [
+    ...(process.env.QA_ANGLE ? [`--use-angle=${process.env.QA_ANGLE}`] : []),
     '--no-sandbox',
     '--disable-setuid-sandbox',
     '--window-size=1440,900',