feat(opencode): add iFlow provider for web tools

[zhengyanglsun]

Issue for this PR

Closes #

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

Adds an opt-in iFlow provider path for OpenCode's existing websearch and webfetch tools.

When explicitly configured, websearch calls iFlow POST /api/search/webSearch and webfetch calls iFlow POST /api/search/webFetch:

OPENCODE_WEBSEARCH_PROVIDER=iflow
OPENCODE_WEBFETCH_PROVIDER=iflow
IFLOW_API_KEY=...

The current default behavior is unchanged. Setting only IFLOW_API_KEY does not change the selected provider. OPENCODE_ENABLE_IFLOW=true is supported only for tool availability checks.

The implementation also normalizes iFlow search/fetch responses into model-friendly text and keeps API keys and Authorization headers out of tool output and metadata.

How did you verify your code works?

Ran the focused tool tests:

bun test --timeout 30000 test/tool/iflow-search.test.ts test/tool/iflow-fetch.test.ts test/tool/websearch.test.ts test/tool/webfetch.test.ts

Result: 40 pass, 0 fail.

Ran typecheck:

bun run typecheck

Result: passed.

Also manually smoke-tested webSearch and webFetch against iFlow using a local IFLOW_API_KEY. No API key or Authorization header is included in this PR.

Screenshots / recordings

Not applicable; this is not a UI change.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

[github-actions]

Hey! Your PR title Add iFlow provider support for websearch and webfetch doesn't follow conventional commit format.

Please update it to start with one of:

• feat: or feat(scope): new feature
• fix: or fix(scope): bug fix
• docs: or docs(scope): documentation changes
• chore: or chore(scope): maintenance tasks
• refactor: or refactor(scope): code refactoring
• test: or test(scope): adding or updating tests

Where scope is the package name (e.g., app, desktop, opencode).

See CONTRIBUTING.md for details.

[github-actions]

Thanks for updating your PR! It now meets our contributing guidelines. 👍