Add keyboard shortcut highlighter to terminal (#114)

* Add keyboard shortcut highlighter to terminal

- Create keyboard-shortcut-highlighter.ts with comprehensive pattern matching
- Integrate highlighter into terminal component alongside URL highlighting
- Support clickable shortcuts like "Ctrl+R", "Ctrl+A", "esc to interrupt"
- Style shortcuts with greyish color and dotted underlines (not blue links)
- Send actual key sequences when shortcuts are clicked
- Handle overlapping matches and avoid double-processing

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Fix keyboard shortcut input handling - add missing event listener

The keyboard shortcut highlighter was dispatching 'terminal-input' events
but the session-view component wasn't listening for them. Added:

- @terminal-input event listener on vibe-terminal component
- handleTerminalInput method that forwards to inputManager.sendInputText()

Now clicked shortcuts like 'Ctrl+R' properly send input to the terminal.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Add Claude Code interactive prompt support to keyboard shortcut highlighter

Make numbered options in Claude Code prompts clickable:
- Pattern: '❯ 1. Yes' or '  2. Yes, and don't ask again'
- Clicking sends the number (1, 2, 3, etc.) to terminal
- Handles both selected (❯) and unselected options
- Uses multiline regex matching for line-start patterns

Now users can click numbered options instead of typing numbers.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Fix Claude Code prompt patterns to handle indented options

Previous patterns required line-start anchors which failed for indented
options within bordered terminal output. Updated patterns:

- Remove restrictive line-start anchors (^)
- Add whitespace-flexible patterns for indented options
- Support both cursor-selected (❯) and plain numbered options
- Handle 'Yes, proceed' and 'No, exit' style options

Now correctly matches:
'❯ 1. Yes, proceed' and '  2. No, exit' patterns.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Simplify Claude Code prompt patterns to be fully generic

Replace keyword-specific patterns with generic numbered option matching:

- ❯ 1. (cursor-selected options)
- 1. xxxxx (any numbered option with text)

Now matches any numbered list item regardless of content:
'1. Yes, proceed', '2. No, exit', '3. Maybe later', etc.

Much cleaner and more flexible than keyword-based matching.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* Fix Claude Code prompt patterns to highlight full option lines

Changed from matching only first word to matching entire lines:
- /❯\s*(\d+)\.\s+.*/ - highlights complete cursor-selected option
- /(\d+)\.\s+.*/ - highlights complete numbered option

Now '1. Yes, proceed' and '2. No, exit' are fully underlined
instead of just '1. Yes' and '2. No'.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

---------

Co-authored-by: Claude <noreply@anthropic.com>

web/src/client/components/session-view.ts

@@ -729,6 +729,13 @@ export class SessionView extends LitElement {
     }
   }
 
+  private async handleTerminalInput(e: CustomEvent) {
+    const { text } = e.detail;
+    if (this.inputManager && text) {
+      await this.inputManager.sendInputText(text);
+    }
+  }
+
   private updateTerminalTransform(): void {
     // Calculate height reduction for keyboard and quick keys
     let heightReduction = 0;
@@ -895,6 +902,7 @@ export class SessionView extends LitElement {
             .hideScrollButton=${this.showQuickKeys}
             class="w-full h-full p-0 m-0"
             @click=${this.handleTerminalClick}
+            @terminal-input=${this.handleTerminalInput}
           ></vibe-terminal>
         </div>
 

web/src/client/components/terminal.ts

@@ -13,6 +13,7 @@
 import { type IBufferCell, type IBufferLine, Terminal as XtermTerminal } from '@xterm/headless';
 import { html, LitElement, type PropertyValues } from 'lit';
 import { customElement, property, state } from 'lit/decorators.js';
+import { processKeyboardShortcuts } from '../utils/keyboard-shortcut-highlighter.js';
 import { createLogger } from '../utils/logger.js';
 import { UrlHighlighter } from '../utils/url-highlighter';
 
@@ -731,6 +732,9 @@ export class Terminal extends LitElement {
     // Process links after rendering
     UrlHighlighter.processLinks(this.container);
 
+    // Process keyboard shortcuts after rendering
+    processKeyboardShortcuts(this.container, this.handleShortcutClick);
+
     // Track render performance in debug mode
     if (this.debugMode) {
       const endTime = performance.now();
@@ -1239,6 +1243,16 @@ export class Terminal extends LitElement {
     }
   };
 
+  private handleShortcutClick = (keySequence: string) => {
+    // Dispatch a custom event with the keyboard shortcut
+    this.dispatchEvent(
+      new CustomEvent('terminal-input', {
+        detail: { text: keySequence },
+        bubbles: true,
+      })
+    );
+  };
+
   render() {
     return html`
       <style>

web/src/client/utils/keyboard-shortcut-highlighter.ts

@@ -0,0 +1,370 @@
+/**
+ * Keyboard Shortcut Highlighter utility for DOM terminal
+ *
+ * Handles detection and highlighting of keyboard shortcuts in terminal content,
+ * making them clickable to send the actual key sequences.
+ */
+
+// Constants
+const TERMINAL_SHORTCUT_CLASS = 'terminal-shortcut';
+
+// Keyboard shortcut patterns (case insensitive)
+const SHORTCUT_PATTERNS = [
+  // Ctrl combinations
+  {
+    pattern: /\bctrl\+([a-z])\b/gi,
+    keySequence: (match: RegExpMatchArray) => `ctrl_${match[1].toLowerCase()}`,
+  },
+  { pattern: /\bctrl\+([0-9])\b/gi, keySequence: (match: RegExpMatchArray) => `ctrl_${match[1]}` },
+  {
+    pattern: /\bctrl\+f([1-9]|1[0-2])\b/gi,
+    keySequence: (match: RegExpMatchArray) => `ctrl_f${match[1]}`,
+  },
+
+  // Common shortcuts
+  {
+    pattern: /\bctrl\+shift\+([a-z])\b/gi,
+    keySequence: (match: RegExpMatchArray) => `ctrl_shift_${match[1].toLowerCase()}`,
+  },
+  {
+    pattern: /\balt\+([a-z])\b/gi,
+    keySequence: (match: RegExpMatchArray) => `alt_${match[1].toLowerCase()}`,
+  },
+  {
+    pattern: /\bcmd\+([a-z])\b/gi,
+    keySequence: (match: RegExpMatchArray) => `cmd_${match[1].toLowerCase()}`,
+  },
+
+  // Function keys
+  { pattern: /\bf([1-9]|1[0-2])\b/gi, keySequence: (match: RegExpMatchArray) => `f${match[1]}` },
+
+  // Special keys
+  { pattern: /\besc\b/gi, keySequence: () => 'escape' },
+  { pattern: /\bescape\b/gi, keySequence: () => 'escape' },
+  { pattern: /\btab\b/gi, keySequence: () => 'tab' },
+  { pattern: /\bshift\+tab\b/gi, keySequence: () => 'shift_tab' },
+  { pattern: /\benter\b/gi, keySequence: () => 'enter' },
+  { pattern: /\breturn\b/gi, keySequence: () => 'enter' },
+  { pattern: /\bbackspace\b/gi, keySequence: () => 'backspace' },
+  { pattern: /\bdelete\b/gi, keySequence: () => 'delete' },
+  { pattern: /\bspace\b/gi, keySequence: () => ' ' },
+
+  // Arrow keys
+  {
+    pattern: /\barrow\s+(up|down|left|right)\b/gi,
+    keySequence: (match: RegExpMatchArray) => `arrow_${match[1].toLowerCase()}`,
+  },
+  {
+    pattern: /\b(up|down|left|right)\s+arrow\b/gi,
+    keySequence: (match: RegExpMatchArray) => `arrow_${match[1].toLowerCase()}`,
+  },
+
+  // Page keys
+  {
+    pattern: /\bpage\s+(up|down)\b/gi,
+    keySequence: (match: RegExpMatchArray) => `page_${match[1].toLowerCase()}`,
+  },
+  { pattern: /\b(home|end)\b/gi, keySequence: (match: RegExpMatchArray) => match[1].toLowerCase() },
+
+  // Common phrases with shortcuts
+  { pattern: /\besc\s+to\s+(interrupt|quit|exit|cancel)\b/gi, keySequence: () => 'escape' },
+  { pattern: /\bpress\s+esc\b/gi, keySequence: () => 'escape' },
+  { pattern: /\bpress\s+enter\b/gi, keySequence: () => 'enter' },
+  { pattern: /\bpress\s+tab\b/gi, keySequence: () => 'tab' },
+  {
+    pattern: /\bpress\s+ctrl\+([a-z])\b/gi,
+    keySequence: (match: RegExpMatchArray) => `ctrl_${match[1].toLowerCase()}`,
+  },
+  {
+    pattern: /\bctrl\+([a-z])\s+to\s+\w+/gi,
+    keySequence: (match: RegExpMatchArray) => `ctrl_${match[1].toLowerCase()}`,
+  },
+
+  // q to quit pattern
+  { pattern: /\bq\s+to\s+(quit|exit)\b/gi, keySequence: () => 'q' },
+  { pattern: /\bpress\s+q\b/gi, keySequence: () => 'q' },
+
+  // Claude Code interactive prompts - generic numbered options
+  { pattern: /❯\s*(\d+)\.\s+.*/g, keySequence: (match: RegExpMatchArray) => match[1] },
+  { pattern: /(\d+)\.\s+.*/g, keySequence: (match: RegExpMatchArray) => match[1] },
+];
+
+type ProcessedRange = {
+  start: number;
+  end: number;
+};
+
+interface ShortcutMatch {
+  text: string;
+  keySequence: string;
+  start: number;
+  end: number;
+}
+
+/**
+ * Main entry point - process all keyboard shortcuts in a container
+ */
+export function processKeyboardShortcuts(
+  container: HTMLElement,
+  onShortcutClick: (keySequence: string) => void
+): void {
+  const processor = new ShortcutProcessor(container, onShortcutClick);
+  processor.process();
+}
+
+/**
+ * ShortcutProcessor class encapsulates the shortcut detection and highlighting logic
+ */
+class ShortcutProcessor {
+  private container: HTMLElement;
+  private lines: NodeListOf<Element>;
+  private processedRanges: Map<number, ProcessedRange[]> = new Map();
+  private onShortcutClick: (keySequence: string) => void;
+
+  constructor(container: HTMLElement, onShortcutClick: (keySequence: string) => void) {
+    this.container = container;
+    this.lines = container.querySelectorAll('.terminal-line');
+    this.onShortcutClick = onShortcutClick;
+  }
+
+  process(): void {
+    if (this.lines.length === 0) return;
+
+    // Process each line
+    for (let i = 0; i < this.lines.length; i++) {
+      this.processLine(i);
+    }
+  }
+
+  private processLine(lineIndex: number): void {
+    const lineText = this.getLineText(lineIndex);
+    if (!lineText) return;
+
+    // Find all shortcuts in this line
+    const shortcuts = this.findShortcutsInLine(lineText);
+
+    // Create clickable shortcuts for each match
+    for (const shortcut of shortcuts) {
+      // Check if already processed
+      if (!this.isRangeProcessed(lineIndex, shortcut.start, shortcut.end)) {
+        this.createShortcutLink(shortcut, lineIndex);
+        this.markRangeAsProcessed(lineIndex, shortcut.start, shortcut.end);
+      }
+    }
+  }
+
+  private findShortcutsInLine(lineText: string): ShortcutMatch[] {
+    const shortcuts: ShortcutMatch[] = [];
+
+    for (const pattern of SHORTCUT_PATTERNS) {
+      // Reset the regex
+      pattern.pattern.lastIndex = 0;
+
+      let match = pattern.pattern.exec(lineText);
+      while (match !== null) {
+        const text = match[0];
+        const keySequence = pattern.keySequence(match);
+        const start = match.index;
+        const end = match.index + text.length;
+
+        shortcuts.push({
+          text,
+          keySequence,
+          start,
+          end,
+        });
+
+        match = pattern.pattern.exec(lineText);
+      }
+    }
+
+    // Sort by start position to handle overlaps
+    shortcuts.sort((a, b) => a.start - b.start);
+
+    // Remove overlapping matches (keep the first one)
+    const nonOverlapping: ShortcutMatch[] = [];
+    for (const shortcut of shortcuts) {
+      const hasOverlap = nonOverlapping.some(
+        (existing) => shortcut.start < existing.end && shortcut.end > existing.start
+      );
+      if (!hasOverlap) {
+        nonOverlapping.push(shortcut);
+      }
+    }
+
+    return nonOverlapping;
+  }
+
+  private createShortcutLink(shortcut: ShortcutMatch, lineIndex: number): void {
+    const line = this.lines[lineIndex];
+    const highlighter = new ShortcutHighlighter(line, shortcut, this.onShortcutClick);
+    highlighter.createLink();
+  }
+
+  private getLineText(lineIndex: number): string {
+    if (lineIndex < 0 || lineIndex >= this.lines.length) return '';
+    return this.lines[lineIndex].textContent || '';
+  }
+
+  private isRangeProcessed(lineIndex: number, start: number, end: number): boolean {
+    const ranges = this.processedRanges.get(lineIndex);
+    if (!ranges) return false;
+
+    return ranges.some((range) => start < range.end && end > range.start);
+  }
+
+  private markRangeAsProcessed(lineIndex: number, start: number, end: number): void {
+    if (!this.processedRanges.has(lineIndex)) {
+      this.processedRanges.set(lineIndex, []);
+    }
+
+    const ranges = this.processedRanges.get(lineIndex);
+    if (ranges) {
+      ranges.push({ start, end });
+    }
+  }
+}
+
+/**
+ * ShortcutHighlighter handles the DOM manipulation to create clickable shortcuts
+ */
+class ShortcutHighlighter {
+  private lineElement: Element;
+  private shortcut: ShortcutMatch;
+  private onShortcutClick: (keySequence: string) => void;
+
+  constructor(
+    lineElement: Element,
+    shortcut: ShortcutMatch,
+    onShortcutClick: (keySequence: string) => void
+  ) {
+    this.lineElement = lineElement;
+    this.shortcut = shortcut;
+    this.onShortcutClick = onShortcutClick;
+  }
+
+  createLink(): void {
+    this.wrapTextInLink(this.lineElement, this.shortcut.start, this.shortcut.end);
+  }
+
+  private wrapTextInLink(lineElement: Element, startCol: number, endCol: number): void {
+    // First pass: collect all text nodes and their positions
+    const walker = document.createTreeWalker(lineElement, NodeFilter.SHOW_TEXT, null);
+    const textNodeData: Array<{ node: Text; start: number; end: number }> = [];
+    let currentPos = 0;
+    let node = walker.nextNode();
+
+    while (node) {
+      const textNode = node as Text;
+      const nodeText = textNode.textContent || '';
+      const nodeStart = currentPos;
+      const nodeEnd = currentPos + nodeText.length;
+
+      // Only collect nodes that overlap with our range
+      if (nodeEnd > startCol && nodeStart < endCol) {
+        textNodeData.push({ node: textNode, start: nodeStart, end: nodeEnd });
+      }
+
+      currentPos = nodeEnd;
+      node = walker.nextNode();
+    }
+
+    // Second pass: process all relevant text nodes in reverse order
+    // (to avoid invalidating positions when modifying the DOM)
+    for (let i = textNodeData.length - 1; i >= 0; i--) {
+      const { node: textNode, start: nodeStart } = textNodeData[i];
+      const nodeText = textNode.textContent || '';
+
+      const linkStart = Math.max(0, startCol - nodeStart);
+      const linkEnd = Math.min(nodeText.length, endCol - nodeStart);
+
+      if (linkStart < linkEnd) {
+        this.wrapTextNode(textNode, linkStart, linkEnd);
+      }
+    }
+  }
+
+  private wrapTextNode(textNode: Text, start: number, end: number): void {
+    const parent = textNode.parentNode;
+    if (!parent) return;
+
+    // Don't wrap if already inside a link or shortcut
+    if (this.isInsideClickable(parent as Element)) return;
+
+    const nodeText = textNode.textContent || '';
+    const beforeText = nodeText.substring(0, start);
+    const linkText = nodeText.substring(start, end);
+    const afterText = nodeText.substring(end);
+
+    // Create the shortcut element
+    const shortcutElement = this.createShortcutElement(linkText);
+
+    // Replace the text node
+    const fragment = document.createDocumentFragment();
+
+    if (beforeText) {
+      fragment.appendChild(document.createTextNode(beforeText));
+    }
+
+    fragment.appendChild(shortcutElement);
+
+    if (afterText) {
+      fragment.appendChild(document.createTextNode(afterText));
+    }
+
+    parent.replaceChild(fragment, textNode);
+  }
+
+  private createShortcutElement(text: string): HTMLSpanElement {
+    const shortcut = document.createElement('span');
+    shortcut.className = TERMINAL_SHORTCUT_CLASS;
+    shortcut.style.color = '#9ca3af'; // Gray-400
+    shortcut.style.textDecoration = 'underline';
+    shortcut.style.textDecorationStyle = 'dotted';
+    shortcut.style.cursor = 'pointer';
+    shortcut.style.fontWeight = '500';
+    shortcut.textContent = text;
+
+    // Add click handler
+    shortcut.addEventListener('click', (e) => {
+      e.preventDefault();
+      e.stopPropagation();
+      this.onShortcutClick(this.shortcut.keySequence);
+    });
+
+    // Add hover effects
+    shortcut.addEventListener('mouseenter', () => {
+      shortcut.style.backgroundColor = 'rgba(156, 163, 175, 0.2)';
+      shortcut.style.color = '#d1d5db'; // Gray-300
+    });
+
+    shortcut.addEventListener('mouseleave', () => {
+      shortcut.style.backgroundColor = '';
+      shortcut.style.color = '#9ca3af'; // Gray-400
+    });
+
+    // Add title for accessibility
+    shortcut.title = `Click to send: ${this.shortcut.keySequence}`;
+
+    return shortcut;
+  }
+
+  private isInsideClickable(element: Element): boolean {
+    let current: Element | null = element;
+    while (current && current !== document.body) {
+      if (
+        (current.tagName === 'A' && current.classList.contains('terminal-link')) ||
+        (current.tagName === 'SPAN' && current.classList.contains(TERMINAL_SHORTCUT_CLASS))
+      ) {
+        return true;
+      }
+      current = current.parentElement;
+    }
+    return false;
+  }
+}
+
+// Export as default for backwards compatibility
+export const KeyboardShortcutHighlighter = {
+  processKeyboardShortcuts,
+};