Update from Git Manager GUI

renderer/Settings.jsx

@@ -0,0 +1,41 @@
+import React, { useState, useEffect } from 'react';
+
+export default function Settings() {
+  const [githubToken, setGithubToken] = useState('');
+  const [giteaToken, setGiteaToken] = useState('');
+  const [giteaURL, setGiteaURL] = useState('');
+
+  useEffect(() => {
+    window.electronAPI.loadCredentials().then(data => {
+      if (data) {
+        setGithubToken(data.githubToken || '');
+        setGiteaToken(data.giteaToken || '');
+        setGiteaURL(data.giteaURL || '');
+      }
+    });
+  }, []);
+
+  const save = () => {
+    window.electronAPI.saveCredentials({ githubToken, giteaToken, giteaURL });
+    alert('Settings saved securely!');
+  }
+
+  return (
+    <div style={{ padding: 20 }}>
+      <h2>Settings</h2>
+      <div>
+        <label>GitHub Token:</label>
+        <input type="password" value={githubToken} onChange={e => setGithubToken(e.target.value)} />
+      </div>
+      <div>
+        <label>Gitea Token:</label>
+        <input type="password" value={giteaToken} onChange={e => setGiteaToken(e.target.value)} />
+      </div>
+      <div>
+        <label>Gitea URL:</label>
+        <input type="text" value={giteaURL} onChange={e => setGiteaURL(e.target.value)} />
+      </div>
+      <button onClick={save} style={{ marginTop: 10 }}>Save</button>
+    </div>
+  );
+}