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/components-new/editor.ts

@@ -38,6 +38,10 @@ export class Editor implements Component {
 	private pastes: Map<number, string> = new Map();
 	private pasteCounter: number = 0;
 
+	// Bracketed paste mode buffering
+	private pasteBuffer: string = "";
+	private isInPaste: boolean = false;
+
 	public onSubmit?: (text: string) => void;
 	public onChange?: (text: string) => void;
 	public disableSubmit: boolean = false;
@@ -84,11 +88,23 @@ export class Editor implements Component {
 					displayText = before + cursor + restAfter;
 					// visibleLength stays the same - we're replacing, not adding
 				} else {
-					// Cursor is at the end - add highlighted space
-					const cursor = "\x1b[7m \x1b[0m";
-					displayText = before + cursor;
-					// visibleLength increases by 1 - we're adding a space
-					visibleLength = layoutLine.text.length + 1;
+					// Cursor is at the end - check if we have room for the space
+					if (layoutLine.text.length < width) {
+						// We have room - add highlighted space
+						const cursor = "\x1b[7m \x1b[0m";
+						displayText = before + cursor;
+						// visibleLength increases by 1 - we're adding a space
+						visibleLength = layoutLine.text.length + 1;
+					} else {
+						// Line is at full width - use reverse video on last character if possible
+						// or just show cursor at the end without adding space
+						if (before.length > 0) {
+							const lastChar = before[before.length - 1];
+							const cursor = `\x1b[7m${lastChar}\x1b[0m`;
+							displayText = before.slice(0, -1) + cursor;
+						}
+						// visibleLength stays the same
+					}
 				}
 			}
 
@@ -112,6 +128,49 @@ export class Editor implements Component {
 	}
 
 	handleInput(data: string): void {
+		// Handle bracketed paste mode
+		// Start of paste: \x1b[200~
+		// End of paste: \x1b[201~
+
+		// Check if we're starting a bracketed paste
+		if (data.includes("\x1b[200~")) {
+			this.isInPaste = true;
+			this.pasteBuffer = "";
+			// Remove the start marker and keep the rest
+			data = data.replace("\x1b[200~", "");
+		}
+
+		// If we're in a paste, buffer the data
+		if (this.isInPaste) {
+			// Append data to buffer first (end marker could be split across chunks)
+			this.pasteBuffer += data;
+
+			// Check if the accumulated buffer contains the end marker
+			const endIndex = this.pasteBuffer.indexOf("\x1b[201~");
+			if (endIndex !== -1) {
+				// Extract content before the end marker
+				const pasteContent = this.pasteBuffer.substring(0, endIndex);
+
+				// Process the complete paste
+				this.handlePaste(pasteContent);
+
+				// Reset paste state
+				this.isInPaste = false;
+
+				// Process any remaining data after the end marker
+				const remaining = this.pasteBuffer.substring(endIndex + 6); // 6 = length of \x1b[201~
+				this.pasteBuffer = "";
+
+				if (remaining.length > 0) {
+					this.handleInput(remaining);
+				}
+				return;
+			} else {
+				// Still accumulating, wait for more data
+				return;
+			}
+		}
+
 		// Handle special key combinations first
 
 		// Ctrl+C - Exit (let parent handle this)
@@ -119,13 +178,6 @@ export class Editor implements Component {
 			return;
 		}
 
-		// Handle paste - detect when we get a lot of text at once
-		const isPaste = data.length > 10 || (data.length > 2 && data.includes("\n"));
-		if (isPaste) {
-			this.handlePaste(data);
-			return;
-		}
-
 		// Handle autocomplete special keys first (but don't block other input)
 		if (this.isAutocompleting && this.autocompleteList) {
 			// Escape - cancel autocomplete
@@ -321,7 +373,7 @@ export class Editor implements Component {
 					const chunkStart = chunkIndex * maxLineLength;
 					const chunkEnd = chunkStart + chunk.length;
 					const cursorPos = this.state.cursorCol;
-					const hasCursorInChunk = isCurrentLine && cursorPos >= chunkStart && cursorPos < chunkEnd;
+					const hasCursorInChunk = isCurrentLine && cursorPos >= chunkStart && cursorPos <= chunkEnd;
 
 					if (hasCursorInChunk) {
 						layoutLines.push({

packages/tui/src/components-new/markdown.ts

@@ -28,17 +28,28 @@ export class Markdown implements Component {
 	private bgColor?: Color;
 	private fgColor?: Color;
 	private customBgRgb?: { r: number; g: number; b: number };
+	private paddingX: number; // Left/right padding
+	private paddingY: number; // Top/bottom padding
 
 	// Cache for rendered output
 	private cachedText?: string;
 	private cachedWidth?: number;
 	private cachedLines?: string[];
 
-	constructor(text: string = "", bgColor?: Color, fgColor?: Color, customBgRgb?: { r: number; g: number; b: number }) {
+	constructor(
+		text: string = "",
+		bgColor?: Color,
+		fgColor?: Color,
+		customBgRgb?: { r: number; g: number; b: number },
+		paddingX: number = 1,
+		paddingY: number = 1,
+	) {
 		this.text = text;
 		this.bgColor = bgColor;
 		this.fgColor = fgColor;
 		this.customBgRgb = customBgRgb;
+		this.paddingX = paddingX;
+		this.paddingY = paddingY;
 	}
 
 	setText(text: string): void {
@@ -71,6 +82,9 @@ export class Markdown implements Component {
 			return this.cachedLines;
 		}
 
+		// Calculate available width for content (subtract horizontal padding)
+		const contentWidth = Math.max(1, width - this.paddingX * 2);
+
 		// Parse markdown to HTML-like tokens
 		const tokens = marked.lexer(this.text);
 
@@ -80,54 +94,79 @@ export class Markdown implements Component {
 		for (let i = 0; i < tokens.length; i++) {
 			const token = tokens[i];
 			const nextToken = tokens[i + 1];
-			const tokenLines = this.renderToken(token, width, nextToken?.type);
+			const tokenLines = this.renderToken(token, contentWidth, nextToken?.type);
 			renderedLines.push(...tokenLines);
 		}
 
-		// Wrap lines to fit width
+		// Wrap lines to fit content width
 		const wrappedLines: string[] = [];
 		for (const line of renderedLines) {
-			wrappedLines.push(...this.wrapLine(line, width));
+			wrappedLines.push(...this.wrapLine(line, contentWidth));
 		}
 
-		// Apply background and foreground colors if specified
-		let result: string[];
-		if (this.bgColor || this.fgColor || this.customBgRgb) {
-			const coloredLines: string[] = [];
-			for (const line of wrappedLines) {
-				// Calculate visible length (strip ANSI codes)
-				const visibleLength = stripVTControlCharacters(line).length;
-				const padding = " ".repeat(Math.max(0, width - visibleLength));
+		// Add padding and apply colors
+		const leftPad = " ".repeat(this.paddingX);
+		const paddedLines: string[] = [];
 
-				// Apply colors
-				let coloredLine = line + padding;
+		for (const line of wrappedLines) {
+			// Calculate visible length (strip ANSI codes)
+			const visibleLength = stripVTControlCharacters(line).length;
+			// Right padding to fill to width (accounting for left padding)
+			const rightPadLength = Math.max(0, width - visibleLength - this.paddingX * 2);
+			const rightPad = " ".repeat(rightPadLength);
 
-				// Apply foreground color first if specified
-				if (this.fgColor) {
-					coloredLine = (chalk as any)[this.fgColor](coloredLine);
-				}
+			// Add left padding, content, and right padding
+			let paddedLine = leftPad + line + rightPad;
 
-				// Apply background color if specified
-				if (this.customBgRgb) {
-					// Use custom RGB background
-					coloredLine = chalk.bgRgb(this.customBgRgb.r, this.customBgRgb.g, this.customBgRgb.b)(coloredLine);
-				} else if (this.bgColor) {
-					coloredLine = (chalk as any)[this.bgColor](coloredLine);
-				}
-
-				coloredLines.push(coloredLine);
+			// Apply foreground color if specified
+			if (this.fgColor) {
+				paddedLine = (chalk as any)[this.fgColor](paddedLine);
 			}
-			result = coloredLines.length > 0 ? coloredLines : [""];
-		} else {
-			result = wrappedLines.length > 0 ? wrappedLines : [""];
+
+			// Apply background color if specified
+			if (this.customBgRgb) {
+				paddedLine = chalk.bgRgb(this.customBgRgb.r, this.customBgRgb.g, this.customBgRgb.b)(paddedLine);
+			} else if (this.bgColor) {
+				paddedLine = (chalk as any)[this.bgColor](paddedLine);
+			}
+
+			paddedLines.push(paddedLine);
 		}
 
+		// Add top padding (empty lines)
+		const emptyLine = " ".repeat(width);
+		const topPadding: string[] = [];
+		for (let i = 0; i < this.paddingY; i++) {
+			let emptyPaddedLine = emptyLine;
+			if (this.customBgRgb) {
+				emptyPaddedLine = chalk.bgRgb(this.customBgRgb.r, this.customBgRgb.g, this.customBgRgb.b)(emptyPaddedLine);
+			} else if (this.bgColor) {
+				emptyPaddedLine = (chalk as any)[this.bgColor](emptyPaddedLine);
+			}
+			topPadding.push(emptyPaddedLine);
+		}
+
+		// Add bottom padding (empty lines)
+		const bottomPadding: string[] = [];
+		for (let i = 0; i < this.paddingY; i++) {
+			let emptyPaddedLine = emptyLine;
+			if (this.customBgRgb) {
+				emptyPaddedLine = chalk.bgRgb(this.customBgRgb.r, this.customBgRgb.g, this.customBgRgb.b)(emptyPaddedLine);
+			} else if (this.bgColor) {
+				emptyPaddedLine = (chalk as any)[this.bgColor](emptyPaddedLine);
+			}
+			bottomPadding.push(emptyPaddedLine);
+		}
+
+		// Combine top padding, content, and bottom padding
+		const result = [...topPadding, ...paddedLines, ...bottomPadding];
+
 		// Update cache
 		this.cachedText = this.text;
 		this.cachedWidth = width;
 		this.cachedLines = result;
 
-		return result;
+		return result.length > 0 ? result : [""];
 	}
 
 	private renderToken(token: Token, width: number, nextTokenType?: string): string[] {

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);

packages/tui/test/chat-simple.ts

@@ -84,16 +84,12 @@ editor.onSubmit = (value: string) => {
 		// Insert before the editor (which is last)
 		const children = tui.children;
 		children.splice(children.length - 1, 0, userMessage);
-
-		// Add spacer after user message
 		children.splice(children.length - 1, 0, new Spacer());
 
 		// Add loader
 		const loader = new Loader(tui, "Thinking...");
-		children.splice(children.length - 1, 0, loader);
-
-		// Add spacer after loader
 		const loaderSpacer = new Spacer();
+		children.splice(children.length - 1, 0, loader);
 		children.splice(children.length - 1, 0, loaderSpacer);
 
 		tui.requestRender();
@@ -101,15 +97,8 @@ editor.onSubmit = (value: string) => {
 		// Simulate a 1 second delay
 		setTimeout(() => {
 			// Remove loader and its spacer
-			const loaderIndex = children.indexOf(loader);
-			if (loaderIndex !== -1) {
-				children.splice(loaderIndex, 1);
-				loader.stop();
-			}
-			const loaderSpacerIndex = children.indexOf(loaderSpacer);
-			if (loaderSpacerIndex !== -1) {
-				children.splice(loaderSpacerIndex, 1);
-			}
+			tui.removeChild(loader);
+			tui.removeChild(loaderSpacer);
 
 			// Simulate a response
 			const responses = [
@@ -127,8 +116,6 @@ editor.onSubmit = (value: string) => {
 			// Add assistant message with no background (transparent)
 			const botMessage = new Markdown(randomResponse);
 			children.splice(children.length - 1, 0, botMessage);
-
-			// Add spacer after assistant message
 			children.splice(children.length - 1, 0, new Spacer());
 
 			// Re-enable submit

packages/tui/test/virtual-terminal.ts

@@ -32,10 +32,13 @@ export class VirtualTerminal implements Terminal {
 	start(onInput: (data: string) => void, onResize: () => void): void {
 		this.inputHandler = onInput;
 		this.resizeHandler = onResize;
-		// No need for raw mode in virtual terminal
+		// Enable bracketed paste mode for consistency with ProcessTerminal
+		this.xterm.write("\x1b[?2004h");
 	}
 
 	stop(): void {
+		// Disable bracketed paste mode
+		this.xterm.write("\x1b[?2004l");
 		this.inputHandler = undefined;
 		this.resizeHandler = undefined;
 	}