docs(09-02): complete playwright-port-autofill plan

- Create 09-02-SUMMARY.md with Playwright e2e evidence for UX-02
- Update STATE.md: decisions, session continuity, progress bar
- Update ROADMAP.md: phase 9 marked complete (3/3 plans with summaries)
- Update REQUIREMENTS.md: UX-02 marked complete

.planning/REQUIREMENTS.md

@@ -19,7 +19,7 @@
 ### UX Tech Debt (UX)
 
 - [x] **UX-01**: After a new driver is uploaded on the printer form, the DriverDesc dropdown refreshes automatically (no manual page reload) — verified live in browser
-- [ ] **UX-02**: PRNT-03 Alpine.js IP→port auto-derivation is verified live in a real browser session, with the verification recorded in VALIDATION.md
+- [x] **UX-02**: PRNT-03 Alpine.js IP→port auto-derivation is verified live in a real browser session, with the verification recorded in VALIDATION.md
 - [x] **UX-03**: The printer detail page exposes direct download links for each generated script (install / uninstall / detect) in addition to the package export buttons
 
 ### Nyquist Validation Track (NYQ)
@@ -58,7 +58,7 @@ Carried forward from v1.0 Out of Scope — no change.
 | RTVAL-04 | Phase 10 | Pending |
 | RTVAL-05 | Phase 10 | Pending |
 | UX-01    | Phase 9  | Complete |
-| UX-02    | Phase 9  | Pending |
+| UX-02    | Phase 9  | Complete |
 | UX-03    | Phase 9  | Complete |
 | NYQ-01   | Phase 8  | Pending |
 | NYQ-02   | Phase 8  | Pending |