fix: add 1M context window checkbox for Claude 3.5 Sonnet v2 in Bedrock provider

[roomote]

Description

This PR addresses Issue #8381 by adding support for the 1M context window checkbox for Claude 3.5 Sonnet v2 (anthropic.claude-sonnet-4-5-20250929-v1:0) in the AWS Bedrock provider settings, matching the existing functionality available for Claude 3.5 Sonnet v1.

Changes

• Added constant for the newer Claude 3.5 Sonnet v2 model
• Updated Bedrock.tsx UI component to show the 1M context checkbox for both Sonnet models
• Updated bedrock.ts provider to handle 1M context for both models
• Updated useSelectedModel hook to apply 1M context for both models

Testing

• ✅ All existing tests pass
• ✅ Bedrock provider tests pass
• ✅ Bedrock UI component tests pass
• ✅ useSelectedModel hook tests pass
• ✅ Linting and type checking pass

Screenshots

The 1M context window checkbox will now appear when selecting Claude 3.5 Sonnet v2 in the Bedrock provider settings, just like it does for v1.

Fixes #8381

---

Important

Adds support for 1M context window for Claude 3.5 Sonnet v2 in Bedrock provider, updating UI and logic to match v1 functionality.

• Behavior:
  • Adds support for 1M context window for Claude 3.5 Sonnet v2 in Bedrock provider, similar to v1.
  • Updates Bedrock.tsx to show 1M context checkbox for both Sonnet models.
  • Updates bedrock.ts to handle 1M context for both models.
  • Updates useSelectedModel hook to apply 1M context for both models.
• Constants:
  • Adds BEDROCK_CLAUDE_SONNET_4_5_MODEL_ID constant in bedrock.ts.
• Testing:
  • All existing tests pass, including Bedrock provider, UI component, and useSelectedModel hook tests.

^{This description was created by for 5d5182b. You can customize this summary. It will automatically update as commits are pushed.}