test: enhance TSX test fixture with more symbols and hooks

tests/basic/test_repomap.py

@@ -563,12 +563,38 @@ fn main() {
             ),
             "tsx": (
                 "test.tsx",
-                (
-                    "import React from 'react';\n\nconst Greeting: React.FC<{ name: string }> = ({"
-                    " name }) => {\n    return <h1>Hello, {name}!</h1>;\n};\n\nexport default"
-                    " Greeting;\n"
-                ),
-                "Greeting",  # Key symbol to check
+                """import React, { useState, useEffect } from 'react';
+
+interface UserProps {
+    name: string;
+    age?: number;
+}
+
+// Component with props interface
+const UserGreeting: React.FC<UserProps> = ({ name, age }) => {
+    const [greeting, setGreeting] = useState<string>('');
+
+    useEffect(() => {
+        setGreeting(`Hello, ${name}${age ? ` (${age})` : ''}!`);
+    }, [name, age]);
+
+    return <h1>{greeting}</h1>;
+};
+
+// Custom hook
+function useCounter(initial: number = 0) {
+    const [count, setCount] = useState(initial);
+    const increment = () => setCount(c => c + 1);
+    return { count, increment };
+}
+
+// Constants
+const DEFAULT_NAME = 'World';
+const MAX_AGE = 150;
+
+export { UserGreeting, useCounter, DEFAULT_NAME, MAX_AGE };
+""",
+                "UserGreeting",  # Key symbol to check
             ),
             "csharp": (
                 "test.cs",