Merge branch 'main' into upstream/terrain-partial-heights

Co-Authored-By: Claude Opus 5.5 <[email protected]>

changelog.d/1405-traffic-layer-stale.md

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+- The Traffic layer reads STALE instead of LIVE when the TomTom proxy serves
+  cached flow tiles (budget spent or TomTom failing), and the row dates them by
+  the oldest cached tile (quanticsoul4772, #1405).

changelog.d/1459-hud-place-lookups.md

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+- Cut the Google requests the HUD's AI summary makes on its own. It no longer
+  looks up place names when no OpenAI key is configured, reverse-geocodes at
+  most two points instead of up to four, and looks up again only once the view
+  shows a different area, not after every small pan, so a small pan no longer
+  asks OpenAI for a new summary either (samehkhamis, #0000).