fix: simplify 1M context locale copy for Claude 4 models

[PeterDaveHello]

Related GitHub Issue

Closes: #

Roo Code Task Context (Optional)

N/A

Description

This PR updates locale copy for the 1M context beta description in settings.

• Updated the following keys in all locale settings.json files:
  • anthropic1MContextBetaDescription
  • awsBedrock1MContextBetaDescription
  • vertex1MContextBetaDescription
• Replaced the long explicit model list with a shorter scope string:
  • Claude Sonnet 4.x / Claude Opus 4.6
• Keeps wording aligned with currently supported 1M Claude 4 models while
  improving readability and maintainability.

Test Procedure

1. Confirm the three keys above are updated in locale files.
2. Verify wording in:
   • webview-ui/src/i18n/locales/en/settings.json
   • webview-ui/src/i18n/locales/zh-TW/settings.json
3. Pre-push validation (auto-run by hook):
   • pnpm run check-types (passed)

Pre-Submission Checklist

• Issue Linked: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
• Scope: My changes are focused on the linked issue (one major feature/fix per PR).
• Self-Review: I have performed a thorough self-review of my code.
• Testing: New and/or updated tests have been added to cover my changes (if applicable).
• Documentation Impact: I have considered if my changes require documentation updates (see "Documentation Updates" section below).
• Contribution Guidelines: I have read and agree to the Contributor Guidelines.

Screenshots / Videos

N/A (copy-only locale update).

Documentation Updates

• No documentation updates are required.
• Yes, documentation updates are required. (Please describe what needs to be updated or link to a PR in the docs repository).

Additional Notes

• This change intentionally updates copy only and does not alter provider logic.

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[roomote-v0]

Rooviewer   See task

No issues found. The locale copy update accurately reflects the current set of 1M context-supported models (Sonnet 4/4.5/4.6 and Opus 4.6) and is consistent across all 18 locale files.

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