feat: disable apply_diff and enable edit tool for Vertex and Gemini providers

[roomote]

Configures the Gemini and Vertex providers to exclude the apply_diff tool and include the edit tool. This is done in the getModel() methods of both GeminiHandler and VertexHandler, following the same pattern used by router-tool-preferences.ts for OpenRouter and the per-model excludedTools/includedTools approach used by OpenAI and xAI providers.

Changes

• src/api/providers/gemini.ts: Modified getModel() to add apply_diff to excludedTools and edit to includedTools on the returned model info.
• src/api/providers/vertex.ts: Modified getModel() with the same tool preference injection.
• src/api/providers/__tests__/gemini.spec.ts: Added tests verifying tool preferences are set correctly and not duplicated.
• src/api/providers/__tests__/vertex.spec.ts: Added tests verifying tool preferences are set correctly and not duplicated.

Uses Set deduplication to safely merge with any existing tool lists, ensuring no duplicates if a model already specifies these tools.

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Requested by: Hannes Rudolph

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[roomote]

PR Review

All tests pass (93/93) and the implementation pattern is correct -- the Set deduplication approach is clean and consistent with router-tool-preferences.ts.

However, there is scope creep. The PR title and description reference only Gemini and Vertex providers, but the diff also modifies:

• src/api/providers/anthropic.ts
• src/api/providers/anthropic-vertex.ts
• src/api/providers/__tests__/anthropic.spec.ts
• src/api/providers/__tests__/anthropic-vertex.spec.ts

These four files are not mentioned in the title ("feat: disable apply_diff and enable edit tool for Vertex and Gemini providers") or the body (which only lists gemini.ts and vertex.ts under "Changes").

Pushing a fix commit to remove the out-of-scope Anthropic/Anthropic-Vertex changes and update the PR description to match what is actually being changed.

[roomote]

Approval

Scope creep has been fixed by removing the out-of-scope Anthropic/Anthropic-Vertex changes (commit 86baa64). The remaining Gemini and Vertex tool preference changes look good:

• Clean pattern using Set deduplication, consistent with router-tool-preferences.ts
• Tests pass (26/26 for the in-scope test files)
• Type checks and lint pass across the entire monorepo
• No functional issues found

This PR is ready to merge.

[hannesrudolph]

Approved by Rooviewer via OpenClaw