feat(terminology): workplan-first dashboard and retirement backlog (STATE-WP-0069)

Add the ranked legacy-interface backlog (T01), rename dashboard navigation and
user-facing copy to workplan while preserving wire-compat API keys (T02), and
activate the retirement workplan with T01/T02 marked done.

dashboard/src/docs/dashboard.md

@@ -6,7 +6,7 @@ title: Dashboard — Technical Reference
 
 The State Hub dashboard is the primary visual interface for the Custodian
 ecosystem. It provides live, reactive views of all tracked domains,
-workstreams, tasks, decisions, contributions, SBOM data, and agent activity —
+workplans, tasks, decisions, contributions, SBOM data, and agent activity —
 all sourced from the local FastAPI state service.
 
 ---
@@ -63,7 +63,7 @@ Current loaders:
 | File | API endpoint |
 |---|---|
 | `summary.json.py` | `/state/summary` |
-| `workstreams.json.py` | `/workplans/` |
+| `workplans.json.py` | `/workplans/` |
 | `contributions.json.py` | `/contributions/` |
 | `decisions.json.py` | `/decisions/` |
 | `domains.json.py` | `/domains/` |
@@ -120,7 +120,7 @@ The dashboard has 30+ pages organised in four navigation groups:
 
 | Page | Route | Purpose |
 |---|---|---|
-| Overview | `/` | Cross-domain summary — workstream chart, status KPIs, blocking decisions, recent activity |
+| Overview | `/` | Cross-domain summary — workplan chart, status KPIs, blocking decisions, recent activity |
 | Capabilities | `/capability-requests` | Capability request routing and fulfilment status |
 | Contributions | `/contributions` | Upstream contribution Kanban (bug reports, feature requests, upstream PRs) |
 | Domains | `/domains` | Per-domain health overview and management |
@@ -140,7 +140,7 @@ The dashboard has 30+ pages organised in four navigation groups:
 | Repo Sync | `/repo-sync` | Consistency checker results and sync status |
 | SBOM | `/sbom` | Software bill of materials — packages, licences, copyleft risk |
 
-### Workstreams section
+### Workplans section
 
 | Page | Route | Purpose |
 |---|---|---|
@@ -173,7 +173,7 @@ Exports shared runtime configuration used by every live-polling page:
 ### `entity-modal.js`
 A lightweight detail overlay for entities. Any table row or card can call
 `openEntityModal(entity, type)` to open a full-detail panel without navigating
-away from the page. Supports four entity types: `workstream`, `task`, `ep`
+away from the page. Supports four entity types: `workplan`, `task`, `ep`
 (extension point), and `td` (technical debt).
 
 Also exports `buildEntityTable()` — a function that constructs a consistent,
@@ -183,7 +183,7 @@ overflow ellipsis, and native tooltip-on-hover for truncated values.
 ### `toc-sidebar.js`
 Provides `injectTocTop(id, element)` — injects a DOM element into the
 Observable Framework table-of-contents sidebar above the page's first section
-heading. Used on the Overview and Workstreams pages to embed live KPI infoboxes
+heading. Used on the Overview and Workplans pages to embed live KPI infoboxes
 directly in the sidebar.
 
 ### `doc-overlay.js`
@@ -194,12 +194,12 @@ without leaving the current page.
 ### `help-tip.js`
 A custom HTML element (`<help-tip>`) that renders an inline abbreviated label
 with an expandable tooltip containing a longer description and a link to the
-relevant reference page. Used in the Workstream Health Index card to annotate
+relevant reference page. Used in the Workplan Health Index card to annotate
 each metric abbreviation.
 
 ### `multiselect.js`
 A multi-value dropdown filter input compatible with Observable's `Inputs.form()`
-reactive pattern. Used on the Workstreams and Tasks pages for domain and status
+reactive pattern. Used on the Workplans and Tasks pages for domain and status
 filtering.
 
 ### `improvement-modal.js`
@@ -223,17 +223,17 @@ shows green when the API is reachable and red with a restart command when it
 is not. This allows the dashboard to be used as a persistent, always-on monitor
 without requiring a page refresh.
 
-### Workstream Health Index (WHI)
+### Workplan Health Index (WHI)
 
-The Workstreams page computes a **Workstream Health Index** — a single
+The Workplans page computes a **Workplan Health Index** — a single
 composite score (0–100%) derived from five graph metrics:
 
 | Metric | Abbrev. | Weight | Interpretation |
 |---|---|---|---|
-| Dependency Density | DD | 30% | Average deps per open workstream; high = tightly coupled |
-| Blocked Ratio | BR | 25% | Share of workstreams in a blocked state |
-| Single-Point Risk | SPR | 15% | Share of workstreams that others depend on but are not yet complete |
-| Parallel Execution Potential | PEP | 20% | Share of workstreams that could start/continue immediately |
+| Dependency Density | DD | 30% | Average deps per open workplan; high = tightly coupled |
+| Blocked Ratio | BR | 25% | Share of workplans in a blocked state |
+| Single-Point Risk | SPR | 15% | Share of workplans that others depend on but are not yet complete |
+| Parallel Execution Potential | PEP | 20% | Share of workplans that could start/continue immediately |
 | Cross-Domain Dependency Ratio | CDDR | 10% | Share of edges crossing domain boundaries |
 
 A **Cycle Presence Indicator** (CPI) detected via DFS halves the total score
@@ -241,17 +241,17 @@ when a dependency cycle is found, since cyclic dependencies cause deadlock.
 The index is computed per-domain as well as globally and displayed in the
 TOC sidebar as a persistent KPI card.
 
-### Multi-mode workstream chart
+### Multi-mode workplan chart
 
 The Overview page renders a horizontal stacked bar chart using `@observablehq/plot`
-showing task counts (done / progress / wait / todo) per workstream.
+showing task counts (done / progress / wait / todo) per workplan.
 A `<select>` dropdown switches between:
 
 - **Lifecycle modes**: proposed, ready, active, blocked, backlog, finished, archived
 - **Health modes**: needs review, stalled
 - **Time modes**: last 1h, 24h, 7d, 30d, today, this week, this month
 
-Domains are sorted by most recent workstream activity (most active domain at
+Domains are sorted by most recent workplan activity (most active domain at
 the top). Title labels and done/total counters are overlaid directly on the bars.
 
 ### Resolve-in-place for blocking decisions
@@ -271,14 +271,14 @@ in direct production dependencies.
 
 ### Dependency graph
 
-The Dependencies page and the Workstreams page both surface inter-workstream
-dependency data. Each workstream card shows the workstreams it depends on
-(`↳ depends on`) and the workstreams it blocks (`⊳ blocks`), derived from
+The Dependencies page and the Workplans page both surface inter-workplan
+dependency data. Each workplan card shows the workplans it depends on
+(`↳ depends on`) and the workplans it blocks (`⊳ blocks`), derived from
 the `WorkstreamDependency` table.
 
 ### Entity modals
 
-Any table row on any list page (workstreams, tasks, extension points, tech debt)
+Any table row on any list page (workplans, tasks, extension points, tech debt)
 can be clicked to open a detail modal with full field data, dependency lists,
 task progress, and timestamps — without a page navigation or a separate detail
 route.
@@ -309,7 +309,7 @@ needed in the source directory). Typical mark types used across the dashboard:
 | Mark | Used for |
 |---|---|
 | `Plot.barX` | Horizontal stacked task-count bars, SBOM licence distribution |
-| `Plot.text` | Workstream title labels and done/total counters overlaid on bars |
+| `Plot.text` | Workplan title labels and done/total counters overlaid on bars |
 | `Plot.ruleX([0])` | Zero-axis rule on all bar charts |
 
 Charts are rendered as inline SVG and inherit Observable Framework's theme
@@ -339,4 +339,4 @@ data and shows the offline error state on each page.
 - [Live Data](/docs/live-data) — polling mechanism and offline behaviour in detail
 - [Connecting to the Hub](/docs/connecting) — MCP server registration
 - [Overview](/docs/overview) — Overview page feature walkthrough
-- [Workstreams](/docs/workstreams) — Workstreams page and WHI in depth
+- [Workplans](/docs/workstreams) — Workplans page and WHI in depth