- PermissionEngine: always-deny returns None via check(); is_always_deny() exposed for explicit rejection; default rules for code_exec/ssh_exec/shell; extract_target() made public.
- ShellRunner: set ShellResult.truncated when output is actually truncated.
- File refs: restrict paths to base_dir/home, block sensitive files/dirs, skip binary, support glob brackets, shared guess_language.
- Permission dialog: deny now renders synthetic tool_call before stopping; shell ! commands require permission with always-allow/deny persistence.
- Tests: add permission tests, fix file_refs/shell tests, add __init__.py to fix pytest name collisions, update websocket integration for AgentSessionOrchestrator.

504 passed, 1 skipped. Ruff clean.

Signed-off-by: Eugene Sukhodolskiy <eugene.sukhodolskiy@gmail.com>

- @ file references with glob/dir support and size limits
- ! shell commands with timeout and output truncation
- inline permission dialog for destructive tool calls
- diff and artifact renderers with theme-aware highlighting

Tests: 40 client tests passing

- Add CommandPaletteScreen modal with fuzzy filtering and keyboard navigation.

- Bind Ctrl+P to push the palette; selected commands execute via registry.

- Make MarkdownRenderer theme-aware: headings, inline code, links, and code blocks use gnexus palette.

- Pick dracula/github-light code theme based on active theme brightness.

Co-Authored-By: Claude <noreply@anthropic.com>

- Register Navi themes as Textual themes so $tui-* CSS variables resolve.

- Update ChatPanel, StatusPanel, InputBox to use palette colors.

- Update all content renderers to draw from the active theme.

- Add set_active_theme/get_active_theme helpers for runtime color access.

Co-Authored-By: Claude <noreply@anthropic.com>

- Extract exact gnexus-ui-kit cyberpunk palette from
  webclient/vendor/gnexus-ui-kit/src/scss/_palette-colors.scss.
- Add clients/terminal/tui/themes.py with Theme dataclass, ThemeRegistry,
  and gnexus-dark / gnexus-light themes.
- Wire theme into NaviCodeTui via _apply_theme() on mount; default is
  gnexus-dark.

Tests: 463 passed, 1 skipped (excluded unrelated websocket test).

Co-Authored-By: Claude <noreply@anthropic.com>

- Add clients/terminal/tui package with micro-architecture:
  - events, context, chat_model, ws_bridge, permissions engine.
  - widgets: ChatPanel, StatusPanel, InputBox.
  - renderers: user/assistant messages, thinking, tool calls, errors,
    markdown, plain — registry-based and extensible.
  - slash commands: /help, /new, /sessions, /switch, /profile, /thinking,
    /compact, /quit — registry-based and extensible.
- Wire navi-code to launch TUI by default; keep click-CLI via --raw.
- Add textual>=0.70 dependency.
- Add TUI smoke tests via Textual Pilot.
- Add docs/plan_navi_code_tui.md with full Phase 4/5 roadmap.

Tests: 463 passed, 1 skipped (excluded unrelated websocket test).

Co-Authored-By: Claude <noreply@anthropic.com>