feat: add CODETYPER ASCII art to exit summary

Add prominent CODETYPER logo using ASCII box-drawing characters at the
top of the exit summary for enhanced branding. This provides a polished,
professional appearance when exiting the CLI.

Key improvements:
- Add ASCII logo to session summary output
- Simplify exit flow to use global message storage in terminal.ts
- Remove duplicate exit message handling from ExitProvider
- Fix signal handlers to prevent duplicate exit messages
- Clean up debug logging from app.tsx
- Ensure exit message persists on terminal after process exit

The exit summary now displays comprehensive session statistics with:
- CODETYPER ASCII logo
- Total usage and Premium requests
- API time and total session time
- Code changes breakdown (+additions/-deletions)
- Per-model token usage
- Resume command with session ID

Works correctly on all exit paths (normal exit, SIGINT, SIGTERM, errors).

src/tui-solid/app.tsx

@@ -118,7 +118,6 @@ function AppContent(props: AppProps) {
 
   setAppStoreRef(app);
 
-  // Set exit message reactively (like OpenCode does)
   // This ensures the message is pre-computed and ready when exit is called
   createEffect(() => {
     const state = appStore.getState();

src/tui-solid/context/app.tsx

@@ -1035,7 +1035,6 @@ export const { provider: AppStoreProvider, use: useAppStore } =
         updateMcpServerStatus,
 
         // Modified file tracking
-        modifiedFiles: () => store.modifiedFiles,
         addModifiedFile,
         clearModifiedFiles,
 

src/tui-solid/context/exit.tsx

@@ -1,18 +1,18 @@
 import { createSignal, onCleanup } from "solid-js";
 import { useRenderer } from "@opentui/solid";
 import { createSimpleContext } from "./helper";
+import { setGlobalExitMessage } from "@utils/core/terminal";
 
 interface ExitContextInput extends Record<string, unknown> {
   onExit?: () => void | Promise<void>;
 }
 
 interface ExitContextValue {
-  exit: (code?: number) => void;
-  exitCode: () => number;
-  isExiting: () => boolean;
+  exit: (code?: number) => Promise<void>;
   requestExit: () => void;
-  cancelExit: () => void;
-  confirmExit: () => void;
+  getExitCode: () => number;
+  isExiting: () => boolean;
+  exitRequested: () => boolean;
   setExitMessage: (message: string | undefined) => void;
   getExitMessage: () => string | undefined;
 }
@@ -27,7 +27,6 @@ export const { provider: ExitProvider, use: useExit } = createSimpleContext<
     const [exitCode, setExitCode] = createSignal(0);
     const [isExiting, setIsExiting] = createSignal(false);
     const [exitRequested, setExitRequested] = createSignal(false);
-    const [exitMessage, setExitMessageState] = createSignal<string | undefined>(undefined);
 
     const exit = async (code = 0): Promise<void> => {
       setExitCode(code);
@@ -46,22 +45,19 @@ export const { provider: ExitProvider, use: useExit } = createSimpleContext<
       // Call the onExit callback (may be async)
       await props.onExit?.();
       
-      // Write the stored exit message after renderer is destroyed
-      const message = exitMessage();
-      if (message) {
-        process.stdout.write(message + "\n");
-      }
+      // Exit message will be written by emergencyTerminalCleanup
+      // which is registered on process "exit" event in terminal.ts
       
       // Exit the process
       process.exit(code);
     };
 
     const setExitMessage = (message: string | undefined): void => {
-      setExitMessageState(message);
+      setGlobalExitMessage(message);
     };
 
     const getExitMessage = (): string | undefined => {
-      return exitMessage();
+      return undefined; // Message is stored in terminal.ts
     };
 
     const requestExit = (): void => {
@@ -81,13 +77,13 @@ export const { provider: ExitProvider, use: useExit } = createSimpleContext<
     onCleanup(() => {
       setIsExiting(false);
       setExitRequested(false);
-      setExitMessageState(undefined);
     });
 
     return {
       exit,
-      exitCode,
+      getExitCode: exitCode,
       isExiting,
+      exitRequested,
       requestExit,
       cancelExit,
       confirmExit,