chore: v1-prep hygiene sweep — LICENSE (MIT), fixtures under tools/, doc staleness

Three-way audit ahead of v1 (structure/necessity, docs-vs-code drift,
mechanical checkers) came back clean: zero dead files, zero doc hard
errors, all 92 options documented, all consistency checkers green, no
untracked files. What it did surface, fixed here:

- LICENSE was missing entirely — the one hard launch blocker. MIT
  (Bernardo's call), pointer at the README foot.
- checks/ was the only top-level dir outside the documented layout rule;
  its two state-legacy-name fixtures moved to tools/fixtures/ (Bernardo
  chose move over documenting an exception), flake.nix refs + drift
  messages updated.
- Doc staleness: two leftover "theme-state" leads (HARDWARE.md,
  REQUIREMENTS.md) now say state.json; VISION Theme C charge-limit row
  gets its ✓; VISION agent-slices datestamp bumped.
- The idle.nix miniTransition duplication (same binary name, lossy
  subset of the real display-transition tool) is deliberately NOT
  refactored here — filed as PROPOSED #150 with the audit evidence.

Wallpapers-in-repo (97 MB) is the known LATER artifact-split item, not
re-filed.

Verification: V0 — nix flake check --no-build green after the fixture
move (state-legacy-name's eval asserts exercise the new paths); doc
edits prose-reviewed. Audits by three Sonnet passes; triage on Fable.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/VISION.md

@@ -85,7 +85,7 @@ Reference: [HARDWARE.md](HARDWARE.md) §4–§5, §11 (doctor).
 | **Dock life** ✓ | Lid closed + external only, wake, default audio sink on undock | ✓ #86 clamshell logind; ✓ #87 WirePlumber HDMI/USB priority (V3 hotplug QA) |
 | **Hibernate/sleep confidence** ✓ | Doctor: resume device, swap size, clean suspend journal | ✓ shipped #77 (+ #76 agent V0–V2; V3 power-cycle HARDWARE-QUEUE) |
 | **Battery health readout** ✓ | Cycles + design capacity % in doctor where sysfs allows | ✓ shipped #80 (report-only; charge limit is a separate row) |
-| **Charge-limit instant apply** | Live sysfs write without rebuild | Shipped menu live-write path 2026-07-10; residual V3 Dell Adaptive / non-BAT* in HARDWARE-QUEUE |
+| **Charge-limit instant apply** ✓ | Live sysfs write without rebuild | ✓ shipped menu live-write path 2026-07-10; residual V3 Dell Adaptive / non-BAT* in HARDWARE-QUEUE |
 
 ---
 
@@ -152,7 +152,7 @@ From GOALS non-goals and installer audits — do not “fill the roadmap” with
 
 ## Suggested agent slices (promote via PROPOSED → NEXT)
 
-**Still open** (as of 2026-07-11). Shipped items above are *not* open work.
+**Still open** (as of 2026-07-17). Shipped items above are *not* open work.
 
 1. `VISION § D` / LATER — wallpapers artifact split (decided deferred;
    promote only if theme-switch latency still hurts after measurement)