* feat: add Brave Web Search WASM tool
Add a new WASM tool for searching the web via the Brave Search API.
Follows the same architecture as the GitHub WASM tool with zero-exposure
credential injection (X-Subscription-Token header).
Features:
- Full Brave Search API support (query, count, country, search_lang,
ui_lang, freshness)
- Input validation on all parameters
- Retry logic for 429/5xx transient errors
- RFC 3986 percent-encoding
- Registry manifest for Extensions tab discovery
Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
* fix: avoid Vec allocation in is_valid_ui_lang
Use iterator-based destructuring instead of collecting into a Vec,
avoiding a heap allocation in the WASM sandbox.
Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
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Co-authored-by: Claude Opus 4.6 (1M context) <[email protected]>
