Inspector: live data updates under interactive selections

docs/IMPLEMENTATION-PLAN.md

@@ -75,9 +75,11 @@ This is the at-a-glance list; keep it in sync with them.
 **Next (flagged for build):**
 
 - **Multi-view data model** ([`multi-view-data-model-scope.md`](exploration/multi-view-data-model-scope.md)) —
-  durable composition support across the data-facing features. Done: the Vega-Lite-fidelity
-  reference classifier (`core/spec-data`) and the view-scoped editor data context. Remaining:
-  per-view data inspection (`DataInspector` view selector), then view-scoped Extract.
+  durable composition support across the data-facing features. **Complete** (M1–M5): the
+  Vega-Lite-fidelity reference classifier (`core/spec-data`), the view-scoped editor data
+  context, per-view data inspection, view-scoped Extract (inline + self-defined `datasets`),
+  and live/interactive inspection. The durable contract is recorded in `docs/architecture`
+  05 (live inspection) and 07 (reference detection + extraction, §3.1–3.2).
 - **Chart Builder · 3B starter examples** ([`chart-builder-enhancement-scope.md`](exploration/chart-builder-enhancement-scope.md) §3) —
   a small set of curated starters, one per covered FT intent. Reshaped by 3C: a
   builder-openable starter must reference a dataset, so it ships paired sample datasets (or is