Refresh MiniMax provider model example to MiniMax-M3

[octo-patch]

Reason: Refresh the user-facing MiniMax provider model example in the OpenCode model editor from the stale MiniMax-M2.7 to the current MiniMax-M3 model ID.

Updates the placeholder text shown in the Provider Model ID field of the OpenCode model editor dialog from e.g., MiniMax-M2.7 to e.g., MiniMax-M3, so the configuration guidance reflects the current MiniMax provider model. The matching test selector that locates this input is updated to keep the discovery test green.

Actual checks:

• Verified no stale MiniMax-M2.7 placeholder reference remains in the touched files.
• Secret scan of the diff returned no findings.

Summary by CodeRabbit

• Bug Fixes
  • Updated the provider model ID example to reference the newer MiniMax-M3 model.
  • Updated model discovery guidance to match the revised example.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 24528448-b658-41b1-8484-a5f67f23aec4

📥 Commits

Reviewing files that changed from the base of the PR and between ba8994e and b91ec0a.

📒 Files selected for processing (2)

• frontend/src/components/settings/OpenCodeModelDialog.tsx
• frontend/src/components/settings/OpenCodeModelsEditor.test.tsx

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📝 Walkthrough

Walkthrough

The provider model ID placeholder changed from MiniMax-M2.7 to MiniMax-M3. The related model discovery test now uses the same example.

Changes

Model placeholder update

Layer / File(s)	Summary
Align model placeholder and test frontend/src/components/settings/OpenCodeModelDialog.tsx, frontend/src/components/settings/OpenCodeModelsEditor.test.tsx	The provider model ID input and its discovery test now use MiniMax-M3.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: chriswritescode-dev

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description explains the change and test update but omits the required Summary, Type of Change, and Checklist sections.	Reformat the description with all template headings, select the change type, and complete the checklist with test and validation results.
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: updating the MiniMax provider model example to MiniMax-M3.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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