Remove Roo Code Cloud CTA surfaces

[brunobergher]

Summary

• remove Roo Code Cloud CTAs from the welcome and home/chat views
• hide Cloud navigation for unauthenticated users while keeping authenticated account management reachable
• remove the Roo provider settings Cloud connect button and long-running-task Cloud banner
• clean up stale Cloud CTA locale strings

Tests

• pnpm --filter @roo-code/vscode-webview exec vitest run src/components/welcome/tests/WelcomeViewProvider.spec.tsx src/components/chat/tests/ChatView.spec.tsx
• pnpm --filter @roo-code/vscode-webview exec vitest run src/tests/App.spec.tsx src/components/chat/tests/TaskHeader.spec.tsx src/components/settings/tests/ApiOptions.spec.tsx
• pnpm --filter @roo-code/vscode-webview exec eslint src/App.tsx src/tests/App.spec.tsx src/components/chat/TaskHeader.tsx src/components/chat/tests/TaskHeader.spec.tsx src/components/settings/providers/Roo.tsx --max-warnings=0
• pnpm --filter roo-cline exec vitest run core/webview/tests/ClineProvider.spec.ts --testNamePattern Cloud
• pnpm --filter roo-cline exec eslint core/webview/ClineProvider.ts --max-warnings=0
• push hook: pnpm check-types

Interactively review PR in Roo Code Cloud

[github-actions]

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