Stop URL parsing at empty lines

- Add check for empty lines (after trimming) to stop URL parsing
- URLs now properly end at empty lines, not just whitespace
- More intuitive behavior for multi-line URL detection

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

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

web/src/client/components/terminal.ts

@@ -572,6 +572,12 @@ export class Terminal extends LitElement {
             remainingText = this.getLineText(lines[j]).trim();
           }
 
+          // Stop if line is empty (after trimming)
+          if (remainingText === '') {
+            endLine = j - 1; // URL ended on previous line
+            break;
+          }
+
           // Find first whitespace character in this line's text
           const whitespaceMatch = remainingText.match(/\s/);
           if (whitespaceMatch) {