8926152fca
- Add showControls prop to TerminalComponent to optionally hide internal header - Add reset() method to TerminalRef for external reset control - TerminalPage now renders a unified fullscreen header bar combining: - Session tabs (TerminalSessionTabs) - Terminal controls (status dot, A-, A+, Reset, Exit Fullscreen) - Unified header is always visible in fullscreen (no hover-to-reveal) - TerminalComponent internal header hidden when in fullscreen mode - Remove old CSS that hid session tabs with opacity:0 until hover Quality gates: pytest 188 passed, frontend typecheck clean Fixes: terminal-fullscreen-unified-header