feat: editable allow all

[al-prk]

Issue for this PR

Closes #25089

Type of change

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

What does this PR do?

When a permission request is approved with Allow always, the TUI currently only lets you confirm the server-suggested patterns. That makes cases like devcontainer exec ls awkward, because the suggested rule is often much broader than what you actually want to allow.

This change makes the Allow always step editable. The prompt now opens a textarea pre-filled with the suggested patterns, and the user can replace them with narrower rules before confirming.

On the backend, the permission reply payload now accepts optional patterns. If custom patterns are provided, those are stored for the session. If the textarea is left empty, the existing behavior is preserved and OpenCode falls back to the server-suggested patterns.

How did you verify your code works?

• Ran bun typecheck in packages/opencode
• Ran bun test test/permission/next.test.ts in packages/opencode
• Added coverage for:
  • custom patterns overriding the suggested always patterns
  • empty custom patterns falling back to the existing behavior
• Manually checked the TUI flow:
  • Allow always opens an editable textarea
  • Enter confirms
  • Esc cancels
  • Alt+Enter inserts a newline

Screenshots / recordings

Checklist

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

[github-actions]

Hey! Your PR title Editable allow all 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. 👍