⚡ Bolt: Optimize JSON Decoding in WasmJs LocalStorageThemeCache

[himattm]

💡 What: Added an in-memory manifestCache to LocalStorageThemeCache to prevent re-parsing the manifest JSON string from localStorage on every cache operation.
🎯 Why: JSON parsing via kotlinx.serialization on the wasmJs target can be slow on the main thread. Accessing localStorage string values repeatedly compounded this problem.
📊 Impact: Eliminates O(N) JSON decoding overhead per cache read/write, dramatically speeding up ThemeCache operations on the web target.
🔬 Measurement: Verify by running web target tests (./gradlew :halogen-engine:wasmJsBrowserTest) or profiling the app before and after to observe fewer decodeFromString calls when the cache is hit multiple times.

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PR created automatically by Jules for task 11524758317310708948 started by @himattm

[google-labs-jules]

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[himattm]

Closing as superseded by #35, which is the latest cleaned LocalStorageThemeCache manifest-cache optimization merged to main. Keeping one canonical implementation avoids merging multiple generated variants of the same change.

[google-labs-jules]

Closing as superseded by #35, which is the latest cleaned LocalStorageThemeCache manifest-cache optimization merged to main. Keeping one canonical implementation avoids merging multiple generated variants of the same change.

Understood. Acknowledging that this work is now obsolete and stopping work on this task.