feat(dashboard): nav restructure, full context-help coverage, 11 new ref docs

Navigation:
- New order: Overview · Todo · Domains · Repos · Workstreams (collapsible,
  open:false, with atomic sub-entries: Decisions, Tasks, Debt, Extends,
  Dependencies) · Contributions · SBOM · Progress · Reference (collapsible)
- Reference section gains path:/reference landing page; all 18 doc pages
  listed in nav (alphabetical) and in reference.md table

New pages:
- todo.md — Internal / Ecosystem / Third-party todo classification
- dependencies.md — dependency edge table derived from state/summary
- reference.md — Reference landing page with full doc index

New reference doc pages (11):
  contributions, debt, dependencies, domains, extensions, overview,
  repos, tasks, todo + reference (meta) already added previously

doc-overlay.js — lazy bubblehelp tooltip:
- _titleCache Map + _fetchDocTitle(docPath): on first hover of any ?
  button, fetches the target doc page, parses <h1>, sets btn.title
- Native browser tooltip appears exactly on the ? circle on subsequent hover

Context-help wired on all 14 dashboard pages:
- h1 withDocHelp added to: index, todo, domains, repos, tasks, techdept,
  extensions, dependencies (contributions/workstreams/decisions/sbom/
  progress/reference were already wired)
- domains.md + repos.md: added missing withDocHelp import and live-data link
- tasks/techdept/extensions: removed duplicate _h1 const that caused
  SyntaxError: Identifier '_h1' has already been declared

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

state-hub/dashboard/src/docs/domains.md

@@ -0,0 +1,82 @@
+---
+title: Domains — Reference
+---
+
+# Domains — Reference
+
+The Domains page shows all registered project domains and the repositories
+associated with each one. Domains are the top-level organisational unit of the
+Custodian ecosystem.
+
+---
+
+## What is a domain?
+
+A domain corresponds to one of the six tracked project areas:
+
+| Slug | Project |
+|------|---------|
+| `custodian` | The Custodian agent system itself |
+| `railiance` | DevOps & infrastructure reliability |
+| `markitect` | Knowledge artifact management |
+| `coulomb_social` | Co-creation marketplace |
+| `personhood` | Rights & obligations framework |
+| `foerster_capabilities` | Agency capability taxonomy |
+
+Each domain has a slug (URL-friendly identifier), a human-readable name, an
+optional description, and a status.
+
+---
+
+## Domain statuses
+
+| Status | Meaning |
+|--------|---------|
+| **active** | Live domain — topics, workstreams, and tasks are being tracked |
+| **archived** | Soft-deleted; no active work. Fails to archive if active topics exist |
+
+---
+
+## KPI row
+
+Four counters at the top of the page:
+
+| Counter | Meaning |
+|---------|---------|
+| Total domains | All registered domains regardless of status |
+| Active | Domains with status `active` |
+| Total repos | Sum of all registered repositories across all domains |
+| Newest domain | Name of the most recently created domain |
+
+---
+
+## Domain cards
+
+One card per domain showing:
+
+- **Slug** — monospace identifier
+- **Status badge** — green `active` or grey `archived`
+- **Name** — display name
+- **Description** — first 160 characters
+- **Repos** — list of registered repositories for this domain, each showing name, local path, and remote URL
+
+---
+
+## Managing domains
+
+Via MCP:
+
+```
+create_domain(slug="my_project", name="My Project", description="…")
+rename_domain(slug="old_slug", new_slug="new_slug", new_name="New Name")
+archive_domain(slug="my_project")   # fails if active topics exist
+```
+
+Via Makefile:
+
+```bash
+make add-domain SLUG=my_project NAME="My Project"
+make rename-domain OLD_SLUG=my_project NEW_SLUG=myproject NEW_NAME="My Project"
+```
+
+*Domains are never hard-deleted — only archived.*