Redesign Nuggets upload portal: single episode submission form; v2.0.5

- Replace two-tab file picker with a combined form: episode name, passage,
  description, and audio file in one submit
- Server now generates an Episode Info text file (name, host, passage,
  description, timestamp) and uploads it to /Episode Info/ automatically,
  while the audio goes to /Episode Upload/
- Drop zone changes color when a valid file is selected (green border)
- Success shows submitted episode name and filename in the session log

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "2.0.4",
+  "version": "2.0.5",
   "type": "module",
   "scripts": {
     "dev": "vite",