feat: add governed chat agent selection

packages/casan-control-panel/frontend/src/lib/api.ts

@@ -108,6 +108,19 @@ export interface ChatAnswer {
   };
   action?: { id: string; label: string; description: string } | null;
   action_gate?: { outcome?: string; reason?: string; exit_code?: number };
+  agent_binding?: {
+    success: boolean;
+    decision: string;
+    reason: string;
+    agent_selected: string;
+    skill_selected: string;
+    delegation_level: number;
+    model_role?: string;
+    mode?: string;
+    tool_allowlist: string[];
+    requires_approval: boolean;
+    audit?: { record_hash?: string; head?: string; seq?: number };
+  };
   actor: SettingsActor;
 }
 
@@ -118,6 +131,19 @@ export interface ChatAction {
   triggers: string[];
 }
 
+export interface ChatAgent {
+  id: string;
+  label: string;
+  mode: string;
+  model_role: string;
+  roles_allowed: string[];
+  skills_allowed: string[];
+  tool_allowlist: string[];
+  max_delegation_level: number;
+  requires_approval?: boolean;
+  allowed_for_role?: boolean;
+}
+
 export interface SettingsState {
   actor: SettingsActor;
   capabilities: {
@@ -164,10 +190,11 @@ export const api = {
     post<{ proposal: any; audit_verify: { ok: boolean; output: string } }>('approvals/submit', body, actorHeaders(actor)),
   decideApproval: (actor: SettingsActor, body: { id: string; decision: 'approve' | 'reject'; reason: string }) =>
     post<{ proposal: any; applied: any; audit_verify: { ok: boolean; output: string } }>('approvals/decide', body, actorHeaders(actor)),
-  askChat: (actor: SettingsActor, body: { message: string; chatId?: string }) =>
+  askChat: (actor: SettingsActor, body: { message: string; chatId?: string; agentId?: string; skillId?: string; delegationLevel?: number }) =>
     post<ChatAnswer>('chat/ask', body, actorHeaders(actor)),
   verifyChatAudit: () => get<{ ok: boolean; output: string }>('chat/audit/verify'),
   chatActions: (actor: SettingsActor) => getWithHeaders<{ success: boolean; actions: ChatAction[] }>('chat/actions', actorHeaders(actor)),
+  chatAgents: (actor: SettingsActor) => getWithHeaders<{ success: boolean; agents: ChatAgent[] }>('chat/agents', actorHeaders(actor)),
 };
 
 // Health is raw (not enveloped) + carries HTTP status.