Update QA instructions: use browser tool instead of Playwright scripts

Headless Chrome 145 now working on VM. QA agents can use the
browser tool directly for page testing, snapshots, and interaction.

projects/business/memory/bugs.md

@@ -167,6 +167,13 @@ The critical mobile responsiveness issue needs immediate fixing. The rate limiti
 - **Works with:** `Authorization: Bearer <key>` header → 200
 - **Problem:** If any docs reference X-API-Key, they're wrong. Only Bearer auth works.
 
+#### 🔴 BUG-025: Copy button on API key display not working
+- **Reported by:** Investor (manual testing)
+- **Location:** Signup modal, step 3 (API key display)
+- **Expected:** Click copy button → key copied to clipboard
+- **Actual:** Nothing happens
+- **Priority:** HIGH — users can't easily copy their API key
+
 ### Observations
 - **Signup modal UI:** Clean 3-step flow (email → verify code → show key). Code input has proper `inputmode="numeric"`, `maxlength="6"`, `pattern` validation.
 - **PDF endpoint:** `/v1/convert/html` (not `/v1/pdf` or `/v1/generate`)