Session 48c: sticky nav fix, partials merge, change-email page, Stripe customer.updated webhook

projects/business/memory/sessions.md

@@ -1113,3 +1113,18 @@
   1. BUG-050: Fix MX DNS record in Hetzner DNS
   2. BUG-049: Enable Stripe invoice emails
   3. Add `customer.subscription.updated` to Stripe webhook events
+
+## Session 48c — 2026-02-17 11:00-11:36 UTC (Investor Feedback Follow-ups)
+- **Sticky navbar:** Root cause was `overflow-x: hidden` on html/body breaking `position: sticky`. Fixed by changing to `overflow-x: clip`. Merged duplicate partials (_nav_index.html → _nav.html, _styles_index.html → _styles_base.html + _styles_index_extra.html). Browser-verified: nav position = sticky ✅
+- **Change Email refactor:**
+  - CEO recommended Option C: keep feature (free tier users need it) but simplify to standalone page
+  - Created `/change-email` as proper page (dark theme, 3-step flow)
+  - Removed modal from index page, updated all footer links to `/change-email`
+  - Added Stripe `customer.updated` webhook handler for automatic Pro email sync
+  - Added `updateEmailByCustomer()` to keys.ts
+  - Updated sitemap.xml
+  - Deployed and verified: page returns 200, footer links correct, health OK
+- **Investor action still needed:**
+  - Add `customer.updated` AND `customer.subscription.updated` to Stripe webhook events
+  - Fix MX DNS record (BUG-050)
+  - Enable Stripe invoice emails (BUG-049)