docs(12.1): create phase plan — per-field text editing and quick-fill

.planning/ROADMAP.md

@@ -272,7 +272,11 @@ Plans:
   3. When a text field is selected, PreparePanel shows quick-fill suggestion buttons (Client Name, Property Address, Client Email) that insert the corresponding value into the selected field
   4. Text fill values entered per-field appear correctly embedded in the preview PDF and the final prepared PDF
   5. The staleness token (previewToken) is reset when any text field value changes
-**Plans**: TBD
+**Plans**: 2 plans
+
+Plans:
+- [ ] 12.1-01-PLAN.md — preparePdf() field-ID-keyed text lookup + Strategy B removal; FieldPlacer click-to-select inline input; PdfViewer + PdfViewerWrapper optional prop chain
+- [ ] 12.1-02-PLAN.md — DocumentPageClient selectedFieldId + textFillData shared state; PreparePanel QuickFillPanel + TextFillForm removal; human verification checkpoint
 
 ### Phase 13: AI Field Placement and Pre-fill
 **Goal**: Agent clicks one button and AI auto-places all field types on the PDF in correct positions and pre-fills text fields with known client and property data
@@ -311,4 +315,5 @@ Phases execute in numeric order: 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 →
 | 11. Agent Saved Signature and Signing Workflow | 3/3 | Complete    | 2026-03-21 | - |
 | 11.1. Agent and Client Initials (INSERTED) | 3/3 | Complete    | 2026-03-21 | - |
 | 12. Filled Document Preview | 2/2 | Complete    | 2026-03-21 | - |
+| 12.1. Per-Field Text Editing and Quick-Fill (INSERTED) | v1.1 | 0/2 | Not started | - |
 | 13. AI Field Placement and Pre-fill | v1.1 | 0/4 | Not started | - |