Add Claude Code settings infrastructure, TUI mode, session naming, and global defaults

Adds first-class support for Claude Code CLI features (2.1.71-2.1.110):

- New ClaudeCodeSettings struct with per-project and global defaults for
  TUI mode, effort level, focus mode, thinking summaries, session recap,
  auto-scroll, env scrub, and 1-hour prompt caching
- Settings injected as env vars (CLAUDE_CODE_NO_FLICKER, etc.) and
  ~/.claude/settings.json entries via entrypoint.sh merge block
- New ClaudeCodeSettingsModal component for configuring settings
- Session naming support (-n flag passed to claude CLI, shown in tabs)
- Relaxed reserved prefix filter: CLAUDE_CODE_* env vars now allowed in
  custom env vars UI for power users
- Global SSH key path, git name, and git email now used as fallbacks
  when per-project values are not set, with UI in SettingsPanel
- Fingerprint-based change detection triggers container recreation when
  Claude Code settings change
- Updated README, HOW-TO-USE, and CLAUDE.md documentation

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/lib/tauri-commands.ts

@@ -45,8 +45,8 @@ export const awsSsoRefresh = (projectId: string) =>
   invoke<void>("aws_sso_refresh", { projectId });
 
 // Terminal
-export const openTerminalSession = (projectId: string, sessionId: string, sessionType?: string) =>
-  invoke<void>("open_terminal_session", { projectId, sessionId, sessionType });
+export const openTerminalSession = (projectId: string, sessionId: string, sessionType?: string, sessionName?: string) =>
+  invoke<void>("open_terminal_session", { projectId, sessionId, sessionType, sessionName });
 export const terminalInput = (sessionId: string, data: number[]) =>
   invoke<void>("terminal_input", { sessionId, data });
 export const terminalResize = (sessionId: string, cols: number, rows: number) =>