v1.1.0 — RSS feed, PWA, lesson comments, progress tracking + streaks

RSS Feed
- /feed.xml proxies the Anchor feed under the site's canonical domain
- Rewrites channel <link> and atom:link self-ref to the site URL
- Served with 30-min Cache-Control, reuses the existing episode cache

PWA
- vite-plugin-pwa installed; Workbox service worker auto-generated on build
- manifest.json inlined in vite.config.ts (name, icons, theme, standalone)
- pwa-192.png and pwa-512.png generated from existing book_icon.png
- StaleWhileRevalidate for /api/episodes and /api/questions; CacheFirst for images
- API, feed.xml, and uploads routes excluded from navigate fallback

Lesson Comments
- Import and wire StudySectionComments into ColossiansStudySectionPage
- Replaces the CommunityBoard in the Lesson Discussion section
- All routes and moderation already existed; only the render was missing

Progress Tracking + Streaks
- Mark-complete handler now records lastStudiedDate, currentStreak, longestStreak on the user record
- Streak increments on consecutive calendar days, resets on a gap
- /api/study-account/overview now returns streak fields
- Account page: 4-stat summary row (notes, streak 🔥, longest streak, member since)
- Per-study progress bars showing completedLessons/totalLessons with gold → green fill at 100%

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

server/routes/feed.js

@@ -0,0 +1,35 @@
+import { fetchRawFeedXml } from './episodes.js'
+import { getCanonicalBaseUrl } from '../email.js'
+
+export function register(app) {
+  app.get('/feed.xml', async (_req, res) => {
+    try {
+      const xml = await fetchRawFeedXml()
+      if (!xml) {
+        res.status(503).send('Feed temporarily unavailable')
+        return
+      }
+
+      const baseUrl = getCanonicalBaseUrl().replace(/\/$/, '')
+      const feedUrl = `${baseUrl}/feed.xml`
+
+      // Rewrite channel <link> and <atom:link href> to our canonical domain
+      const rewritten = xml
+        .replace(
+          /<atom:link[^>]+rel="self"[^>]*\/>/,
+          `<atom:link href="${feedUrl}" rel="self" type="application/rss+xml"/>`
+        )
+        .replace(
+          /(<channel>[\s\S]*?<link>)[^<]*(\/link>)/,
+          `$1${baseUrl}$2`
+        )
+
+      res.set('Content-Type', 'application/rss+xml; charset=utf-8')
+      res.set('Cache-Control', 'public, max-age=1800')
+      res.send(rewritten)
+    } catch (err) {
+      console.error('[feed.xml]', err?.message ?? err)
+      res.status(502).send('Failed to fetch feed')
+    }
+  })
+}