Rewrite from Go + vanilla JS to Python (FastAPI) + React (TypeScript)

- Backend: Python 3.12 with FastAPI, SQLAlchemy, boto3
- Frontend: React 18 with TypeScript, Vite build tooling
- Updated Dockerfile for multi-stage Node + Python build
- Updated CI pipeline for Python backend
- Removed old Go code (cmd/, internal/, go.mod, go.sum)
- Updated README with new tech stack documentation

frontend/src/pages/Home.tsx

@@ -0,0 +1,128 @@
+import { useState, useEffect } from 'react';
+import { Link } from 'react-router-dom';
+import { Grove } from '../types';
+import { listGroves, createGrove } from '../api';
+import './Home.css';
+
+function Home() {
+  const [groves, setGroves] = useState<Grove[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [showForm, setShowForm] = useState(false);
+  const [newGrove, setNewGrove] = useState({ name: '', description: '', is_public: true });
+  const [creating, setCreating] = useState(false);
+
+  useEffect(() => {
+    loadGroves();
+  }, []);
+
+  async function loadGroves() {
+    try {
+      setLoading(true);
+      const data = await listGroves();
+      setGroves(data);
+      setError(null);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to load groves');
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  async function handleCreateGrove(e: React.FormEvent) {
+    e.preventDefault();
+    try {
+      setCreating(true);
+      await createGrove(newGrove);
+      setNewGrove({ name: '', description: '', is_public: true });
+      setShowForm(false);
+      loadGroves();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to create grove');
+    } finally {
+      setCreating(false);
+    }
+  }
+
+  if (loading) {
+    return <div className="loading">Loading groves...</div>;
+  }
+
+  return (
+    <div className="home">
+      <div className="page-header">
+        <h1>Groves</h1>
+        <button className="btn btn-primary" onClick={() => setShowForm(!showForm)}>
+          {showForm ? 'Cancel' : '+ New Grove'}
+        </button>
+      </div>
+
+      {error && <div className="error-message">{error}</div>}
+
+      {showForm && (
+        <form className="form card" onSubmit={handleCreateGrove}>
+          <h3>Create New Grove</h3>
+          <div className="form-group">
+            <label htmlFor="name">Name</label>
+            <input
+              id="name"
+              type="text"
+              value={newGrove.name}
+              onChange={(e) => setNewGrove({ ...newGrove, name: e.target.value })}
+              placeholder="my-project"
+              required
+            />
+          </div>
+          <div className="form-group">
+            <label htmlFor="description">Description</label>
+            <input
+              id="description"
+              type="text"
+              value={newGrove.description}
+              onChange={(e) => setNewGrove({ ...newGrove, description: e.target.value })}
+              placeholder="Optional description"
+            />
+          </div>
+          <div className="form-group checkbox">
+            <label>
+              <input
+                type="checkbox"
+                checked={newGrove.is_public}
+                onChange={(e) => setNewGrove({ ...newGrove, is_public: e.target.checked })}
+              />
+              Public
+            </label>
+          </div>
+          <button type="submit" className="btn btn-primary" disabled={creating}>
+            {creating ? 'Creating...' : 'Create Grove'}
+          </button>
+        </form>
+      )}
+
+      {groves.length === 0 ? (
+        <div className="empty-state">
+          <p>No groves yet. Create your first grove to get started!</p>
+        </div>
+      ) : (
+        <div className="grove-grid">
+          {groves.map((grove) => (
+            <Link to={`/grove/${grove.name}`} key={grove.id} className="grove-card card">
+              <h3>{grove.name}</h3>
+              {grove.description && <p>{grove.description}</p>}
+              <div className="grove-meta">
+                <span className={`badge ${grove.is_public ? 'badge-public' : 'badge-private'}`}>
+                  {grove.is_public ? 'Public' : 'Private'}
+                </span>
+                <span className="date">
+                  Created {new Date(grove.created_at).toLocaleDateString()}
+                </span>
+              </div>
+            </Link>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}
+
+export default Home;