feat: make repo path blue and underline on hover

Updated the repository path link in the welcome message to be blue
(#3b82f6) and show underline on hover. Enhanced TerminalLink component
to support hover states and click handlers in inline mode.

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

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

Author: brandonkachen

cli/src/chat.tsx

@@ -291,12 +291,12 @@ export const App = ({
 
       blocks.push({
         type: 'html',
-        render: ({ textColor }) => (
+        render: () => (
           <text>
             Codebuff can read and write files in{' '}
             <TerminalLink
               text={displayPath}
-              color={textColor}
+              color="#3b82f6"
               inline={true}
               onActivate={async () => {
                 await openFileAtPath(repoRoot)

cli/src/components/terminal-link.tsx

@@ -50,9 +50,26 @@ export const TerminalLink: React.FC<TerminalLinkProps> = ({
     }
   }, [onActivate])
 
-  // For inline mode, render as a simple span (no hover/click in inline mode)
+  // For inline mode, wrap in a text element with hover support
   if (inline) {
-    return <span fg={displayColor}>{text}</span>
+    const content = shouldUnderline ? (
+      <u>
+        <span fg={displayColor}>{text}</span>
+      </u>
+    ) : (
+      <span fg={displayColor}>{text}</span>
+    )
+
+    return (
+      <text
+        wrap={false}
+        onMouseOver={() => setIsHovered(true)}
+        onMouseOut={() => setIsHovered(false)}
+        onMouseDown={handleActivate}
+      >
+        {content}
+      </text>
+    )
   }
 
   return (