feat(workplans): CUST-WP-0018/0019/0020 — API hardening, dashboard UX polish, test suite

Consolidates all open technical debt into three workplans:
- CUST-WP-0018: API hardening & code quality (TD-006–019 medium/high items)
- CUST-WP-0019: Dashboard UX polish (Repos nav restructure, config.js cleanup,
  todo filter fix for new suggestion workflow statuses)
- CUST-WP-0020: pytest test suite with real DB (TD-014)

Also fixes todo.md Suggestions filter: was checking status===open but new
suggestions enter with status=submitted; now excludes terminal statuses only.

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

workplans/CUST-WP-0019-dashboard-ux-polish.md

@@ -0,0 +1,92 @@
+---
+id: CUST-WP-0019
+type: workplan
+title: "State Hub Dashboard — UX Polish"
+domain: custodian
+status: active
+owner: custodian
+topic_slug: custodian
+created: "2026-03-18"
+updated: "2026-03-18"
+---
+
+# State Hub Dashboard — UX Polish
+
+## Summary
+
+Targeted UX improvements to the Observable Framework dashboard. These are
+all small, self-contained changes with high visible impact. Tasks are ordered
+by priority; each is independently deliverable.
+
+## Sources
+
+- Submitted UI suggestion `c2fc284a` (Repos nav restructure)
+- TD-CUST-002 residual (remaining inline API/POLL in non-main pages)
+
+---
+
+## Tasks
+
+### T01 — Repos nav: rename to "Repository" section with sub-pages
+
+```task
+id: CUST-WP-0019-T01
+status: todo
+priority: high
+```
+
+User suggestion: rename the "Repos" nav link to "Repository" and restructure
+it as a collapsible section containing the three repo-related pages as
+sub-items.
+
+**Location:** `state-hub/dashboard/observablehq.config.js` (pages array)
+
+Target nav structure:
+```
+Repository
+  ├── Repo Sync   (/repos)
+  ├── SBOM        (/sbom)
+  └── Tech Debt   (/techdept)
+```
+
+Implementation: in `observablehq.config.js` replace the flat `Repos` page
+entry with a section group containing three children. Update any hardcoded
+`/repos` or `/sbom` or `/techdept` links in other pages if they break.
+
+---
+
+### T02 — Centralize remaining inline API/POLL constants
+
+```task
+id: CUST-WP-0019-T02
+status: todo
+priority: low
+```
+
+TD-CUST-002 residual: `policy/workstream-dod.md` still has a hard-coded
+`const API = "http://127.0.0.1:8000"`. Migrate to import from `config.js`.
+(Note: `contributions.md` and `goals.md` use intentionally different POLL
+values — leave as-is or add named exports like `POLL_SLOW = 30_000` to
+`config.js` if preferred.)
+
+**Location:** `state-hub/dashboard/src/policy/workstream-dod.md:6`
+
+---
+
+### T03 — UI Feedback page: mark suggestion as submitted in todo filter
+
+```task
+id: CUST-WP-0019-T03
+status: todo
+priority: low
+```
+
+`todo.md` Suggestions section filters with `t.status === "open"` but new
+suggestions now enter with `status: "submitted"` (workflow redesign from
+CUST-WP session). Update filter to include `submitted`, `analyse`, `plan`,
+`implement`, `test`, `review` — i.e. any non-terminal status.
+
+**Location:** `state-hub/dashboard/src/todo.md:41`
+
+Current: `.filter(t => t.debt_type === "dashboard-improvement" && t.status === "open")`
+Target: `.filter(t => t.debt_type === "dashboard-improvement" && !["finished","wont_fix","resolved","deferred"].includes(t.status))`