[claude-code] Add ClaudeCode settings UI component

[edelauna]

Parent issue

#756

Depends on

#757 #761

Context

Adds the provider settings panel for Claude Code, following the OpenAICodex component pattern. No sign-in button needed — authentication is done externally via claude login.

Files

• webview-ui/src/components/settings/providers/ClaudeCode.tsx (new)
• webview-ui/src/components/settings/providers/index.ts
• webview-ui/src/components/settings/ApiOptions.tsx (register provider)
• i18n keys in src/i18n/locales/en/settings.json
• webview-ui/src/components/settings/providers/__tests__/ClaudeCode.spec.tsx (new)

Work

• Auth status indicator: green checkmark + version string when connected; amber warning "Claude CLI not found — run claude login" when not
• Model picker with hidePricing (subscription-based, same as Codex)
• Optional CLI path text input, maps to claudeCodeCliPath setting
• Billing note: "Uses your Claude Pro/Max subscription. Usage draws from your plan limits."
• Requests claudeCodeAuthStatus on mount; re-checks when claudeCodeCliPath changes

Tests

• Renders connected state with version string
• Renders disconnected state with install instructions
• CLI path input updates claudeCodeCliPath via setApiConfigurationField
• Model picker is present
• Billing note is rendered

Acceptance criteria

• Component renders correctly in light, dark, and high-contrast themes (uses VS Code CSS variables)
• All i18n keys present in settings.json
• All tests pass