Add git event types to ClientMessage and SSEEvent

src/server.ts

@@ -47,6 +47,8 @@ function createDefaultSessionState(): SessionState {
     mode: "normal",
     model: null,
     idle_since: null,
+    git_branch: null,
+    git_files_json: null,
     dirty: false,
   };
 }

src/types.ts

@@ -136,6 +136,16 @@ export type ClientMessage =
       tool_timestamps: number[];
       session_start: number;
       idle_since: number | null;
+    }
+  | {
+      type: "git";
+      branch: string;
+      files: Array<{
+        path: string;
+        status: string;
+        additions: number;
+        deletions: number;
+      }>;
     };
 
 export type ServerMessage =
@@ -191,6 +201,12 @@ export type SSEEvent =
       mode: "normal" | "auto_accept" | "plan";
       model: string | null;
       idle_since: number | null;
+    }
+  | {
+      type: "git";
+      session_id: number;
+      branch: string;
+      files_json: string;
     };
 
 // Session state tracking (in-memory)
@@ -212,5 +228,7 @@ export interface SessionState {
   mode: "normal" | "auto_accept" | "plan";
   model: string | null;
   idle_since: number | null;
+  git_branch: string | null;
+  git_files_json: string | null;
   dirty: boolean;
 }