docs: RFC-002 Input + Definition of Done + Compliance Matrix update

- RFC_DEFINITION_OF_DONE.md (v1.0, LOCKED):
  - 12 criteria for every RFC component
  - Sign-off roles: Author, Reviewer, Automated, QA
  - Exit criteria: all 12 must pass

- RFC-002: Canonical Input Component:
  - Cognitive Purpose: captures free-form text/numeric data
  - When to Use/NOT Use: clear boundaries vs Select, Switch, Date Picker
  - Interaction Contract: click, type, tab, blur, enter, escape
  - Failure Behaviour: invalid, network, max length, required, disabled
  - Accessibility Contract: label, focus, error, required, screen reader
  - AI Contract: when to choose Input vs alternatives
  - Token Dependencies: 13 tokens (bg, border, text, padding, radius, sizes, states)
  - Layout, Sizes (sm/md/lg), Variants (default/ghost/filled), States (8 states)
  - Keyboard, Touch, Motion (with reduced motion)
  - Anti-Patterns: placeholder as label, validation only on submit, etc.
  - Related Components: Select, Textarea, Search, Form, Label
  - DDR References: DDR-001, DDR-002, DDR-003
  - Acceptance Criteria: 10 checklist items

- COMPLIANCE_MATRIX.md: Input updated to 33% (Governance 🟡, Tokens 🟡,
  Motion 🟡, Accessibility 🟡, AI ✅, QA ⏳)

Rationale: Validate RFC-001 template works for different component types.
Definition of Done ensures consistent quality. Compliance Matrix tracks
progress visibly.

docs/design/RFC_DEFINITION_OF_DONE.md

@@ -0,0 +1,60 @@
+# RFC DEFINITION OF DONE
+
+**Quality Gate for Every RFC Component**
+
+| | |
+|---|---|
+| **Version** | 1.0 |
+| **Status** | LOCKED |
+| **Scope** | All Tier 1, 2, 3 components |
+
+---
+
+## Checklist
+
+| # | Criterion | Requirement | Verified By |
+|---|-----------|-------------|-------------|
+| 1 | **RFC Structure** | 100% complete per `COMPONENT_TEMPLATE.md` | Self-check + Review |
+| 2 | **Cognitive Purpose** | Documented — what problem does this solve? | Self-check + Review |
+| 3 | **User Expectation** | Documented — what does the user expect? | Self-check + Review |
+| 4 | **Interaction Contract** | Documented — events, responses, state machine | Self-check + Review |
+| 5 | **Failure Behaviour** | Documented — every failure mode handled | Self-check + Review |
+| 6 | **Accessibility Contract** | Documented — WCAG 2.1 AA compliance | Self-check + Review |
+| 7 | **AI Contract** | Documented — when AI chooses this component | Self-check + Review |
+| 8 | **Token Dependencies** | All tokens listed, no hardcoded values | Automated lint |
+| 9 | **Motion** | Follows Motion System v1, reduced motion included | Self-check + Review |
+| 10 | **Anti-Patterns** | Relevant anti-patterns listed and avoided | Self-check + Review |
+| 11 | **Compliance Matrix** | Updated in same PR | Self-check |
+| 12 | **Reference Example** | Working implementation or Storybook story | Implementation |
+
+## Sign-Off
+
+| Role | Responsibility |
+|------|---------------|
+| **Author** | Self-check all criteria before requesting review |
+| **Reviewer** | Verify criteria 1–7, 9–10 |
+| **Automated** | Verify criteria 8 (lint) |
+| **QA** | Verify criterion 12 |
+
+## Exit Criteria
+
+**MUST** pass all 12 criteria before component is marked "Complete" in Compliance Matrix.
+
+**MAY** merge with criteria 12 pending if implementation is in separate PR.
+
+---
+
+## ÄNDRINGSHISTORIA
+
+| Version | Datum | Beskrivning |
+|---------|-------|-------------|
+| 1.0 | 2026-07-02 | Initial Definition of Done for RFC components |
+
+---
+
+## STATUS
+
+**LOCKED**
+
+- Mindre revideringar: 1.x-serien
+- Brytande ändringar: Kräver Architecture Review, ny major-version (2.0+)