docs(10-03): complete credential-field help text plan

- Add 10-03-SUMMARY.md with full deviation documentation
- Update STATE.md: progress 97%, decisions, session
- Update ROADMAP.md: phase 10 plan progress (2/3 summaries)
- Mark UX-04 requirement complete in REQUIREMENTS.md

.planning/phases/10-content-clarity/10-03-SUMMARY.md

@@ -0,0 +1,98 @@
+---
+phase: 10-content-clarity
+plan: "03"
+subsystem: schemas
+tags: [tooltips, help-text, ux, registry, credential-fields]
+dependency_graph:
+  requires: []
+  provides: [UX-04]
+  affects: [src/components/ui/FieldRenderer.tsx, src/components/ui/PasswordField.tsx]
+tech_stack:
+  added: []
+  patterns: [FieldDef enrichment, tooltipText/helpText data layer]
+key_files:
+  created: []
+  modified:
+    - src/schemas/registry.ts
+    - src/components/wizard/RemoteConfigStep.test.tsx
+decisions:
+  - "S3 region gets tooltipText only (no helpText needed — placeholder is already descriptive)"
+  - "S3-compatible and S3 access key fields get both helpText and tooltipText"
+  - "GCS service_account_credentials tooltipText includes official doc link for key creation"
+  - "SFTP host and user intentionally get no tooltipText (self-explanatory, per user decision)"
+  - "B2 and GCS already had helpText — added tooltipText only, no rewrites"
+  - "OneDrive drive_id gets tooltipText alongside existing helpText"
+  - "Selector ambiguity fix ({ selector: 'input' }) applied to all getByLabelText calls now that tooltip buttons render aria-label attributes matching field labels"
+metrics:
+  duration_minutes: 7
+  completed_date: "2026-04-01"
+  tasks_completed: 2
+  files_modified: 2
+requirements_satisfied: [UX-04]
+---
+
+# Phase 10 Plan 03: Credential Field Help Text and Tooltips Summary
+
+**One-liner:** Enriched BACKEND_REGISTRY with actionable tooltipText and helpText for all S3, S3-compatible, GCS, B2, and OneDrive drive_id credential fields, directing users to the exact console location to find each value.
+
+## What Was Built
+
+Registry.ts now contains contextual help for 11 credential fields across 5 backend types. Each tooltip tells users WHERE to find the value (not just what it is), with doc links for GCS service account JSON creation.
+
+### Fields enriched
+
+| Backend | Field | tooltipText | helpText |
+|---|---|---|---|
+| s3 | access_key_id | Yes (IAM console path) | Yes |
+| s3 | secret_access_key | Yes (shown-once warning) | Yes |
+| s3 | region | Yes (S3 console bucket list) | No |
+| s3-compatible | access_key_id | Yes (Wasabi/R2/MinIO paths) | Yes |
+| s3-compatible | secret_access_key | Yes (shown-once warning) | Yes |
+| s3-compatible | endpoint | Yes (provider examples) | No (pre-existing) |
+| gcs | project_number | Yes (Cloud Console path, numeric vs text ID) | No (pre-existing) |
+| gcs | service_account_credentials | Yes (IAM steps + doc link) | No (pre-existing) |
+| b2 | account | Yes (App Keys page, key ID vs account ID) | No (pre-existing) |
+| b2 | key | Yes (shown-once warning) | No (pre-existing) |
+| onedrive | drive_id | Yes (rclone authorize output, b! prefix) | No (pre-existing) |
+
+### Fields intentionally unchanged
+- azureblob key, sas_url — pre-existing tooltipText preserved
+- onedrive token — pre-existing tooltipText preserved
+- sftp host, user — no tooltip (self-explanatory per user decision)
+- sftp pass, key_pem — pre-existing helpText preserved
+
+## Tests
+
+37 tests pass. Added 4 new UX-01 tests verifying tooltip info buttons render for:
+- S3 `access_key_id`
+- S3-compatible `endpoint`
+- GCS `service_account_credentials`
+- B2 `account` (Application Key ID)
+
+## Deviations from Plan
+
+### Auto-fixed Issues
+
+**1. [Rule 1 - Bug] Fixed getByLabelText selector ambiguity across test suite**
+- **Found during:** Task 1 (immediately after first test run)
+- **Issue:** Adding tooltipText to fields causes tooltip buttons to render with `aria-label="More info about {Field Label}"`. This made `getByLabelText(/field name/i)` match both the input element AND the tooltip button, triggering "Found multiple elements" errors in 13 tests.
+- **Fix:** Added `{ selector: 'input' }` to all affected `getByLabelText` calls in BACK-02, BACK-03, BACK-01 (drive_id), BACK-03 GCS, BACK-04 B2, and VALID-01 blocks. This is the same DEBT-01 pattern resolved in Phase 09-03.
+- **Files modified:** `src/components/wizard/RemoteConfigStep.test.tsx`
+- **Commit:** 489dfab
+
+## Commits
+
+| Hash | Message |
+|---|---|
+| 356d557 | feat(10-03): enrich registry.ts with tooltipText and helpText for credential fields |
+| 489dfab | feat(10-03): add tooltip tests for enriched fields; fix selector ambiguity |
+
+## Self-Check
+
+Files exist:
+- src/schemas/registry.ts — verified (tooltipText count: 15 = 1 interface + 14 fields)
+- src/components/wizard/RemoteConfigStep.test.tsx — verified (37 tests pass)
+
+Commits exist:
+- 356d557 — verified
+- 489dfab — verified