ci: re-trigger after #468 crawler-overload mitigation (RunnerService RPC p95 11741ms->1273ms, dispatch recovered); prior run dispatch-starved, code unchanged [no-op]

Audit item #3. canvas/public/molecule-icon.png was a 1,301,237-byte
1024×1024 RGBA PNG rendered at 20×20 (w-5 h-5) via a raw <img> in
Toolbar.tsx:162 — a ~1.3 MB asset for a 20 px logo, fetched eagerly
with no optimization on every canvas load.

- Downscale the asset to 40×40 (2,220 bytes). 40 px source = 2× the
  20 px render box, so it stays crisp on HiDPI while well under the
  10 KB / ≤48 px target.
- Switch the single usage to next/image with explicit width={20}
  height={20} and the same `w-5 h-5` className — identical 20 px
  visual. `priority` because the toolbar logo is always above-the-fold
  (avoids a lazy-load flash for a tiny always-rendered asset) and
  silences the LCP-candidate warning.

Asset bytes: before 1,301,237 (1024×1024) → after 2,220 (40×40).
Reduction: 1,299,017 bytes (99.83%). `npm run build` clean (no
next/image warnings); full 3300-test vitest suite passes including
the Toolbar render test.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

canvas/src/components/Toolbar.tsx

@@ -1,6 +1,7 @@
 "use client";
 
 import { useMemo, useState, useCallback, useEffect, useRef } from "react";
+import Image from "next/image";
 import { api } from "@/lib/api";
 import { useCanvasStore } from "@/store/canvas";
 import { SettingsButton } from "@/components/settings/SettingsButton";
@@ -159,7 +160,14 @@ export function Toolbar() {
     >
       {/* Logo / Title — title text drops on mobile to reclaim space */}
       <div className="flex items-center gap-2 sm:pr-3 sm:border-r sm:border-line/60">
-        <img src="/molecule-icon.png" alt="Molecule AI" className="w-5 h-5" />
+        <Image
+          src="/molecule-icon.png"
+          alt="Molecule AI"
+          width={20}
+          height={20}
+          className="w-5 h-5"
+          priority
+        />
         <span className="hidden sm:inline text-[11px] font-semibold text-ink-mid tracking-wide">Molecule AI</span>
       </div>