Fix terminal rendering and add improvements

- Enable bracketed paste mode for handling large pastes
- Fix editor duplicate line rendering bug at terminal width
- Add padding support to Markdown component (paddingX/Y)
- Add Spacer component for vertical spacing
- Update chat-simple with spacers between messages

packages/tui/src/terminal.ts

@@ -48,12 +48,18 @@ export class ProcessTerminal implements Terminal {
 		process.stdin.setEncoding("utf8");
 		process.stdin.resume();
 
+		// Enable bracketed paste mode - terminal will wrap pastes in \x1b[200~ ... \x1b[201~
+		process.stdout.write("\x1b[?2004h");
+
 		// Set up event handlers
 		process.stdin.on("data", this.inputHandler);
 		process.stdout.on("resize", this.resizeHandler);
 	}
 
 	stop(): void {
+		// Disable bracketed paste mode
+		process.stdout.write("\x1b[?2004l");
+
 		// Remove event handlers
 		if (this.inputHandler) {
 			process.stdin.removeListener("data", this.inputHandler);