feat(cli): TUI complete overhaul — components, sidebar, search, branding (#157)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

packages/types/src/chat/events.ts

@@ -9,6 +9,26 @@ export interface AgentStartPayload {
 
 export interface AgentEndPayload {
   conversationId: string;
+  usage?: SessionUsagePayload;
+}
+
+/** Session metadata emitted with agent:end and on session:info */
+export interface SessionUsagePayload {
+  provider: string;
+  modelId: string;
+  thinkingLevel: string;
+  tokens: {
+    input: number;
+    output: number;
+    cacheRead: number;
+    cacheWrite: number;
+    total: number;
+  };
+  cost: number;
+  context: {
+    percent: number | null;
+    window: number;
+  };
 }
 
 export interface AgentTextPayload {
@@ -42,6 +62,23 @@ export interface ErrorPayload {
 export interface ChatMessagePayload {
   conversationId?: string;
   content: string;
+  provider?: string;
+  modelId?: string;
+}
+
+/** Session info pushed when session is created or model changes */
+export interface SessionInfoPayload {
+  conversationId: string;
+  provider: string;
+  modelId: string;
+  thinkingLevel: string;
+  availableThinkingLevels: string[];
+}
+
+/** Client request to change thinking level */
+export interface SetThinkingPayload {
+  conversationId: string;
+  level: string;
 }
 
 /** Socket.IO typed event map: server → client */
@@ -53,10 +90,12 @@ export interface ServerToClientEvents {
   'agent:thinking': (payload: AgentThinkingPayload) => void;
   'agent:tool:start': (payload: ToolStartPayload) => void;
   'agent:tool:end': (payload: ToolEndPayload) => void;
+  'session:info': (payload: SessionInfoPayload) => void;
   error: (payload: ErrorPayload) => void;
 }
 
 /** Socket.IO typed event map: client → server */
 export interface ClientToServerEvents {
   message: (data: ChatMessagePayload) => void;
+  'set:thinking': (data: SetThinkingPayload) => void;
 }

packages/types/src/chat/index.ts

@@ -7,6 +7,9 @@ export type {
   AgentThinkingPayload,
   ToolStartPayload,
   ToolEndPayload,
+  SessionUsagePayload,
+  SessionInfoPayload,
+  SetThinkingPayload,
   ErrorPayload,
   ChatMessagePayload,
   ServerToClientEvents,