fix(navigation): load AMap JS SDK for Autocomplete search

[conversun]

Summary

The AMap (高德地图) JavaScript SDK is referenced in the navigation search code but was never loaded, causing ReferenceError: AMap is not defined when users toggle to the AMap search provider.

Bug

navigation_destination.js calls new AMap.Autocomplete() in two places (handleSearchKey and searchInput) but the AMap JS SDK is never loaded — neither statically in index.html nor dynamically in JavaScript. This means AMap-based destination search is completely broken.

Fix

index.html (+1 line):

• Added <script src="https://webapi.amap.com/loader.js"></script> to load the AMap JSAPI Loader

navigation_destination.js (+42 lines):

• Added ensureAMapLoaded() lazy-load singleton function that:
  • Configures window._AMapSecurityConfig with the user's security key (AMapKey2)
  • Calls AMapLoader.load() with the user's API key (AMapKey1), version 2.0, and AMap.Autocomplete plugin
  • Caches the load promise to avoid redundant SDK loads
  • Handles errors with user-facing showSnackbar() feedback
• Updated both AMap search paths (handleSearchKey and searchInput) to await ensureAMapLoaded() before creating Autocomplete instances

Testing

• Requires valid AMap API keys (Key Update interface.py #1 and Key Space pilot #2) configured in device settings
• Toggle search provider to "Amap" and search for a destination
• Verify autocomplete suggestions appear
• Verify error message appears if keys are invalid or network is unavailable

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Handle missing AMapLoader before calling load

If https://webapi.amap.com/loader.js fails to load (e.g., offline device, CDN blocked, or strict CSP), AMapLoader is undefined here and this statement throws a ReferenceError before the promise .catch() can run. In that case both AMap search paths fail with an uncaught error and users never see the intended snackbar fallback, so the new error handling does not actually cover this common failure mode.

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