feat(v2): add Claude profile switching, skill discovery, and extended agent options

Add switcher-claude multi-account support with profile selector in AgentPane
toolbar, skill autocomplete menu (type / in prompt), and 5 new AgentQueryOptions
fields (setting_sources, system_prompt, model, claude_config_dir,
additional_directories) flowing through full stack from Rust to SDK.

New Tauri commands: claude_list_profiles, claude_list_skills, claude_read_skill,
pick_directory. New frontend adapter: claude-bridge.ts.

v2/src/lib/adapters/agent-bridge.ts

@@ -12,6 +12,11 @@ export interface AgentQueryOptions {
   max_budget_usd?: number;
   resume_session_id?: string;
   permission_mode?: string;
+  setting_sources?: string[];
+  system_prompt?: string;
+  model?: string;
+  claude_config_dir?: string;
+  additional_directories?: string[];
   remote_machine_id?: string;
 }
 

v2/src/lib/adapters/claude-bridge.ts

@@ -0,0 +1,28 @@
+// Claude Bridge — Tauri IPC adapter for Claude profiles and skills
+import { invoke } from '@tauri-apps/api/core';
+
+export interface ClaudeProfile {
+  name: string;
+  email: string | null;
+  subscription_type: string | null;
+  display_name: string | null;
+  config_dir: string;
+}
+
+export interface ClaudeSkill {
+  name: string;
+  description: string;
+  source_path: string;
+}
+
+export async function listProfiles(): Promise<ClaudeProfile[]> {
+  return invoke<ClaudeProfile[]>('claude_list_profiles');
+}
+
+export async function listSkills(): Promise<ClaudeSkill[]> {
+  return invoke<ClaudeSkill[]>('claude_list_skills');
+}
+
+export async function readSkill(path: string): Promise<string> {
+  return invoke<string>('claude_read_skill', { path });
+}