docs(09-03): complete script-download-links plan

- Add 09-03-SUMMARY.md documenting .ps1 routes + detail-page links
- Update STATE.md with decisions and session info
- Update ROADMAP.md phase 9 progress (1/3 summaries)
- Mark UX-03 complete in REQUIREMENTS.md

.planning/REQUIREMENTS.md

@@ -20,7 +20,7 @@
 
 - [ ] **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
-- [ ] **UX-03**: The printer detail page exposes direct download links for each generated script (install / uninstall / detect) in addition to the package export buttons
+- [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)
 
@@ -59,7 +59,7 @@ Carried forward from v1.0 Out of Scope — no change.
 | RTVAL-05 | Phase 10 | Pending |
 | UX-01    | Phase 9  | Pending |
 | UX-02    | Phase 9  | Pending |
-| UX-03    | Phase 9  | Pending |
+| UX-03    | Phase 9  | Complete |
 | NYQ-01   | Phase 8  | Pending |
 | NYQ-02   | Phase 8  | Pending |
 | NYQ-03   | Phase 8  | Pending |