Fix 5 bugs: analytics range keys, stale visitor rows, NuggetsPage init state, episodes timer leak, unsanitized nuggets object; v2.0.1

- analytics: union byDayReal+byDayBot keys so bot-only days aren't dropped from range totals
- analytics: exclude timestamp-less visitor rows from range filters (was unconditionally including them)
- App.tsx: init `configured` to false so a network failure doesn't show a misleading "no episodes" state; add r.ok guard before r.json()
- episodes.js: wrap fetch in try/catch so clearTimeout is called on network failure, matching the nuggets.js pattern
- helpers.js: add sanitizeNuggets + wire it into sanitizeSiteContent so corrupted hosts/urls can't crash NuggetsPage

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

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "2.0.0",
+  "version": "2.0.1",
   "type": "module",
   "scripts": {
     "dev": "vite",