Rename terminology to industry standard terms

- Grove → Project
- Tree → Package
- Fruit → Artifact
- Graft → Tag
- Cultivate → Upload
- Harvest → Download

Updated across:
- Backend models, schemas, and routes
- Frontend types, API client, and components
- README documentation
- API endpoints now use /project/:project/packages pattern

frontend/src/pages/PackagePage.tsx

@@ -0,0 +1,160 @@
+import { useState, useEffect, useRef } from 'react';
+import { useParams, Link } from 'react-router-dom';
+import { Tag } from '../types';
+import { listTags, uploadArtifact, getDownloadUrl } from '../api';
+import './Home.css';
+import './PackagePage.css';
+
+function PackagePage() {
+  const { projectName, packageName } = useParams<{ projectName: string; packageName: string }>();
+  const [tags, setTags] = useState<Tag[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [uploading, setUploading] = useState(false);
+  const [uploadResult, setUploadResult] = useState<string | null>(null);
+  const [tag, setTag] = useState('');
+  const fileInputRef = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    if (projectName && packageName) {
+      loadTags();
+    }
+  }, [projectName, packageName]);
+
+  async function loadTags() {
+    try {
+      setLoading(true);
+      const data = await listTags(projectName!, packageName!);
+      setTags(data);
+      setError(null);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to load tags');
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  async function handleUpload(e: React.FormEvent) {
+    e.preventDefault();
+    const file = fileInputRef.current?.files?.[0];
+    if (!file) {
+      setError('Please select a file');
+      return;
+    }
+
+    try {
+      setUploading(true);
+      setError(null);
+      const result = await uploadArtifact(projectName!, packageName!, file, tag || undefined);
+      setUploadResult(`Uploaded successfully! Artifact ID: ${result.artifact_id}`);
+      setTag('');
+      if (fileInputRef.current) {
+        fileInputRef.current.value = '';
+      }
+      loadTags();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Upload failed');
+    } finally {
+      setUploading(false);
+    }
+  }
+
+  if (loading) {
+    return <div className="loading">Loading...</div>;
+  }
+
+  return (
+    <div className="home">
+      <nav className="breadcrumb">
+        <Link to="/">Projects</Link> / <Link to={`/project/${projectName}`}>{projectName}</Link> / <span>{packageName}</span>
+      </nav>
+
+      <div className="page-header">
+        <h1>{packageName}</h1>
+      </div>
+
+      {error && <div className="error-message">{error}</div>}
+      {uploadResult && <div className="success-message">{uploadResult}</div>}
+
+      <div className="upload-section card">
+        <h3>Upload Artifact</h3>
+        <form onSubmit={handleUpload} className="upload-form">
+          <div className="form-group">
+            <label htmlFor="file">File</label>
+            <input
+              id="file"
+              type="file"
+              ref={fileInputRef}
+              required
+            />
+          </div>
+          <div className="form-group">
+            <label htmlFor="tag">Tag (optional)</label>
+            <input
+              id="tag"
+              type="text"
+              value={tag}
+              onChange={(e) => setTag(e.target.value)}
+              placeholder="v1.0.0, latest, stable..."
+            />
+          </div>
+          <button type="submit" className="btn btn-primary" disabled={uploading}>
+            {uploading ? 'Uploading...' : 'Upload'}
+          </button>
+        </form>
+      </div>
+
+      <h2>Tags / Versions</h2>
+      {tags.length === 0 ? (
+        <div className="empty-state">
+          <p>No tags yet. Upload an artifact with a tag to create one!</p>
+        </div>
+      ) : (
+        <div className="tags-table">
+          <table>
+            <thead>
+              <tr>
+                <th>Tag</th>
+                <th>Artifact ID</th>
+                <th>Created</th>
+                <th>Actions</th>
+              </tr>
+            </thead>
+            <tbody>
+              {tags.map((t) => (
+                <tr key={t.id}>
+                  <td><strong>{t.name}</strong></td>
+                  <td className="artifact-id">{t.artifact_id.substring(0, 12)}...</td>
+                  <td>{new Date(t.created_at).toLocaleString()}</td>
+                  <td>
+                    <a
+                      href={getDownloadUrl(projectName!, packageName!, t.name)}
+                      className="btn btn-secondary btn-small"
+                      download
+                    >
+                      Download
+                    </a>
+                  </td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        </div>
+      )}
+
+      <div className="usage-section card">
+        <h3>Usage</h3>
+        <p>Download artifacts using:</p>
+        <pre>
+          <code>curl -O {window.location.origin}/api/v1/project/{projectName}/{packageName}/+/latest</code>
+        </pre>
+        <p>Or with a specific tag:</p>
+        <pre>
+          <code>curl -O {window.location.origin}/api/v1/project/{projectName}/{packageName}/+/v1.0.0</code>
+        </pre>
+      </div>
+    </div>
+  );
+}
+
+export default PackagePage;