feat(web): add pin-in-progress session layout modes

[techotaku39]

Summary

• Add a persisted Detailed/Combined layout preference for pinned in-progress sessions.
• Preserve the upstream Detailed layout with separate In progress and Active sessions sections.
• Add Combined layout with project-directory grouping, all active sessions shown, and expandable archived sessions below a divider.
• Keep the layout selector in the same settings block as pinning and disable it when pinning is turned off.
• Add localized copy, same-tab preference synchronization, unit tests, and Chromium coverage.

Validation

• bun run typecheck — passed.
• Web targeted Vitest tests — passed, 52/52.
• bun run build — passed.
• Terminal wrap fidelity Chromium E2E — passed, 2/2.
• Session list layout Chromium E2E — passed, 2/2.

Related Issues

None

AI Assistance

Implemented and validated with OpenAI Codex (GPT-5.6).

[github-actions]

Findings

• None.

Summary

• Review mode: initial
• No reportable correctness, security, regression, data-loss, performance, or maintainability issues found in the latest diff. Residual risk: the new split active/archived grouping has no focused coverage for project-pinned sessions changing active state or for its interaction with active-only/search filters.

Testing

• Not run (automation; PR content was not executed). GitHub status at review time: integration passed; test and pr-review pending.

HAPI Bot