docs(10-01): complete intro-section and step-descriptions plan

- SUMMARY.md with full execution record
- STATE.md: progress updated, 3 decisions added, session recorded
- ROADMAP.md: phase 10 progress updated (1/3 summaries)
- REQUIREMENTS.md: UX-01 and UX-03 marked complete
- deferred-items.md: pre-existing RemoteConfigStep test failures logged

.planning/ROADMAP.md

@@ -83,7 +83,7 @@ Plans:
   2. Remote name field displays a placeholder example, help text, and a live preview showing how the name appears in `[remote-name]` config syntax
   3. Every wizard step has a 1-2 sentence description below the heading explaining what the user is doing and why
   4. All backend credential fields have contextual help text explaining what to enter and where to find the value
-**Plans:** 3 plans
+**Plans:** 2/3 plans executed
 Plans:
 - [ ] 10-01-PLAN.md — Intro section with CTA and step descriptions for all 4 steps
 - [ ] 10-02-PLAN.md — Remote name live config preview with helpText
@@ -113,5 +113,5 @@ Plans:
 | 7. Validation & UX Polish | v1.1 | 3/3 | Complete | 2026-03-31 |
 | 8. Theme Foundation | v1.2 | 2/2 | Complete | 2026-04-01 |
 | 9. MD3 Components | v1.2 | 5/5 | Complete | 2026-04-01 |
-| 10. Content & Clarity | v1.2 | 0/3 | In progress | - |
+| 10. Content & Clarity | 2/3 | In Progress|  | - |
 | 11. Polish & Responsiveness | v1.2 | 0/? | Not started | - |