docs: 1.0 documentation restructure

Split root CLAUDE.md into 19 per-directory files scoped to their source area.
Roll v0 history into docs/ARCHIVE.md; retire CONTEXT.md, CONTEXT-ARCHIVE.md,
PLAN.md, COMPLETED.md. Move plan docs under docs/. Rescue 9 live deferrals
into docs/TODO.md.

docs/product/visual-design-language.md

@@ -16,11 +16,12 @@ written after Daniel DAW-tested the S1–S6 instrument:
 revised 2026-07-26 (Daniel)** from the single electric-cyan accent to a **three-accent
 pastel system** (primary/secondary/tertiary = pastel lime green / pastel teal / pastel
 purple) — see §6. (A stylish-font upgrade was considered and **declined** by Daniel — no
-font bundling/redistribution; the kit keeps its current cached-font face.) The build points it feeds live in
-**PLAN.md §Phase L** (**L1** the shared LICE drawing kit, **L2** the dock-panel layout
-redesign, **L3** the VST editor + embed-strip restyle) and **CONTEXT.md §Phase L** (the
-design-system spec). Toolkit facts below are **verified against the vendored `vendor/WDL`
-tree**, not lore.
+font bundling/redistribution; the kit keeps its current cached-font face.) The build points it
+fed have landed; their history is in **`docs/ARCHIVE.md`** ("Phase L — Look-and-feel", **L1** the
+shared LICE drawing kit, **L2** the dock-panel layout redesign, **L3** the VST editor +
+embed-strip restyle) and the architecture now lives in **`src/core/ui/CLAUDE.md`** /
+**`src/shell/panel/CLAUDE.md`** (the design-system implementation). Toolkit facts below are
+**verified against the vendored `vendor/WDL` tree**, not lore.
 
 > **Phase-boundary note (2026-07-26).** This look-and-feel effort was originally drafted
 > as Phase S points **S0-DS** (the shared kit) and **S14** (the panel refresh). It was
@@ -497,7 +498,7 @@ within the pastel intent — is one file.
 
 ---
 
-## 5. The build shape (feeds PLAN.md / CONTEXT.md §Phase L)
+## 5. The build shape (landed history in `docs/ARCHIVE.md` §Phase L)
 
 Three points and their sequencing.
 
@@ -547,7 +548,7 @@ draw it.
   affordances, per-selection **move / copy / remove** sample menu.
 - **Prune** button (R-E) — the byte-deleting action, `warn`-colored.
 
-*M11 adds (dev PLAN.md M11 — merging now):*
+*M11 adds (landed — `docs/ARCHIVE.md` Milestone 11):*
 - **Action trigger buttons** — clickable buttons that fire the capture + provenance
   action family directly (capture item / capture track scopes, re-capture from source,
   resample-and-mute-source, batch capture, conform-on-insert, insert-at-cursor, drag-out,