add bocha web search tool

[weijintaocode]

Description

Add Bocha as a new web search provider to enhance Chatbox's real-time search capabilities.

Screenshots

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[themez]

Thanks for contributing! Here's some feedback:

Issues to fix

1. Typo: bochaAvaliable → bochaAvailable
Multiple occurrences in web-search.tsx.

2. Duplicated API call logic
bocha.ts and checkBoCha in web-search.tsx both implement the same API request independently. Please reuse the BoChaSearch class for the check function, consistent with how checkTavily works.

3. Import path in bocha.ts

// ❌ bare src/ path may not resolve at build time
import { SearchResult } from 'src/shared/types'
// ✅ use the project's path alias
import { SearchResult } from '@shared/types'

4. Silent error swallowing in bocha.ts

} catch (error) {
    return { results: [] }
}

This silently returns empty results for all errors (bad API key, network failure, quota exceeded). Users won't know what went wrong. Please throw a meaningful error instead of swallowing it — refer to how other providers handle errors.

5. Formatting

• index.ts line 11: import { BoChaSearch} — missing space before }
• constructor has a trailing comma and unnecessary line break

6. Response parsing

const results = response.data?.webPages?.value || []

No validation on the response structure. If the API format changes, this silently returns empty results. Consider adding basic validation or at least logging unexpected responses.

Minor suggestions (non-blocking)

• { query: query } → { query }
• requestBody variable can be inlined
• Consider adding a link to BoCha's API key page in the settings UI (like Tavily does)