Normalize agent instructions and workplan frontmatter (STATE-WP-0067)

- Align agent files with on-disk workplan prefixes (infer from workplan ids)
- Set workplan domain to registered domain_slug; add topic_slug where applicable
- Repair frontmatter delimiter formatting; migrate legacy task status literals
- Regenerate AGENTS.md, CLAUDE.md, and .claude/rules from State Hub templates

workplans/CE-WP-0004-citation-card-export.md

@@ -2,7 +2,7 @@
 id: CE-WP-0004
 type: workplan
 title: "Citation card export — Markdown and HTML renderers, sidebar export"
-domain: citation_evidence
+domain: infotech
 repo: citation-evidence
 repo_id: a677c189-b4e2-4f2a-9e48-faa482c277e6
 topic_slug: citation_evidence_mvp
@@ -16,8 +16,7 @@ depends_on_workplan: CE-WP-0002
 spec_refs:
   - wiki/ProductRequirementsDocument.md
   - wiki/ArchitectureOverview.md
-  - wiki/SharedContracts.md
----
+  - wiki/SharedContracts.md---
 
 # CE-WP-0004 — Citation Card Export
 
@@ -43,7 +42,6 @@ T01 (CitationCard type + open-context URL convention)
        └─ T04 (sidebar Export button + copy-to-clipboard)
             └─ T05 (E2E test of PRD scenario step 10)
 ```
-
 ---
 
 ## T01 — `CitationCard` type + open-context URL convention