fix: respect Claude CLI startup mode setting (#12)

The "Startup Mode" setting (normal/bypass/allowedTools) was saved to
settings but never read when spawning sessions. All code paths had
--dangerously-skip-permissions hardcoded. Now reads claudeMode from
~/.claudeman/settings.json and passes it through Session → TmuxManager.

Closes #12

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/types.ts

@@ -105,6 +105,14 @@ export interface LifecycleEntry {
 
 // ========== Session Types ==========
 
+/**
+ * Claude CLI startup permission mode.
+ * - `'dangerously-skip-permissions'`: Bypass all permission prompts (default)
+ * - `'normal'`: Standard mode with permission prompts
+ * - `'allowedTools'`: Only allow specific tools (requires allowedTools list)
+ */
+export type ClaudeMode = 'dangerously-skip-permissions' | 'normal' | 'allowedTools';
+
 /**
  * Configuration for creating a new session
  */