fix: FilePreview fileType case + Tailwind v4 gradient transparent bug

- FilePreview.vue: add normalizedFileType computed to handle backend
  returning uppercase HTML/MD/PPTX (fixes preview/download buttons)
- FilePreview.vue: bg-gradient-to-r from-orange-500 -> bg-orange-500
  (Tailwind v4 gradient + CSS variable = transparent)
- ReportCard.vue: bg-gradient-to-r -> bg-orange-600 for selected state
- Add .opencode/, node_modules/, dist/ to .gitignore
- Initial git setup for publish project

test-backend-status.py

@@ -0,0 +1,26 @@
+import urllib.request
+import json
+
+# 1. Check if backend is running
+try:
+    req = urllib.request.Request('http://localhost:37821/api/projects')
+    resp = urllib.request.urlopen(req, timeout=3)
+    projects = json.loads(resp.read().decode())
+    print('Backend is running!')
+    print('Projects:', len(projects))
+    for p in projects:
+        print('  id={} name={} coverImage={}'.format(p['id'], p['name'], p['coverImage']))
+except Exception as e:
+    print('Backend NOT running or error:', e)
+
+# 2. Check if uploads directory exists
+import os
+uploads_dir = 'D:/Idea Project/publish/uploads'
+if os.path.exists(uploads_dir):
+    print('Uploads dir exists:', uploads_dir)
+    for root, dirs, files in os.walk(uploads_dir):
+        for f in files:
+            fpath = os.path.join(root, f)
+            print('  File:', fpath)
+else:
+    print('Uploads dir NOT found:', uploads_dir)