ui: Add Thinking mode toggle with reasoning effort levels + improvements for Chat Form Add Action UI (#23434) feat: Add "Thinking" toggle and status icon + redesign Chat Form Actions Add panel test: Update test reference fix: Icon fix: E2E test command fix: wait for greeting h1 to be visible in e2e test fix: remove duplicate PDF option in attachment dropdown fix: use label-based group toggle to avoid stale references refactor: inline MCP server and tool toggles in mobile sheet fix: serve correct build directory in e2e playwright config feat: add reasoning effort levels selector in model dropdown feat: Reasoning effort refactor: Make server origin configurable via environment variable feat: Add chat template thinking detector utility feat: Add thinking support detection to models store refactor: Update model selector components with thinking detection and message-specific indicators feat: Update chat form components for model selection and thinking support feat: Improve Reasoning controls UI refactor: Apply suggestions from code review Co-authored-by: Aleksander Grygier fix: Model tags refactor: Cleanup refactor: Remove unneeded components refactor: Cleanup macOS/iOS: macOS Apple…