diff --git a/src/app/globals.css b/src/app/globals.css
index dc98be7..3de2ac0 100755
--- a/src/app/globals.css
+++ b/src/app/globals.css
@@ -79,6 +79,7 @@
 }
 
 .dark {
+  color-scheme: dark;
   --background: oklch(0.145 0 0);
   --foreground: oklch(0.985 0 0);
   --card: oklch(0.205 0 0);
@@ -112,6 +113,46 @@
   --sidebar-ring: oklch(0.556 0 0);
 }
 
+/*
+ * OVE light theme (v6.3).
+ *
+ * The app is styled with the Tailwind zinc/emerald/rose/amber utilities
+ * directly (no semantic tokens for the app chrome), so the light theme is
+ * implemented by REMAPPING those palettes under `.light` (next-themes sets
+ * the class on <html>):
+ *   • zinc is inverted — 950 (page) becomes white, 100 (text) becomes
+ *     near-black; borders/hover/panels land on their light equivalents;
+ *   • emerald/rose/amber accents are deepened one step so text and buttons
+ *     keep WCAG-ish contrast on white (emerald-400 → emerald-600 etc.),
+ *     hover states still lighten (emerald-300 → emerald-500);
+ *   • the visualization canvas keeps its own black stage by design.
+ */
+.light {
+  color-scheme: light;
+
+  /* inverted zinc ramp */
+  --color-zinc-50: #18181b;
+  --color-zinc-100: #18181b;
+  --color-zinc-200: #27272a;
+  --color-zinc-300: #3f3f46;
+  --color-zinc-400: #52525b;
+  --color-zinc-500: #71717a;
+  --color-zinc-600: #8b8b93;
+  --color-zinc-700: #d4d4d8;
+  --color-zinc-800: #e4e4e7;
+  --color-zinc-900: #fafafa;
+  --color-zinc-950: #ffffff;
+
+  /* deeper accents for white backgrounds */
+  --color-emerald-200: #a7f3d0;
+  --color-emerald-300: #10b981;
+  --color-emerald-400: #059669;
+  --color-rose-300: #f43f5e;
+  --color-rose-400: #e11d48;
+  --color-amber-300: #b45309;
+  --color-amber-400: #d97706;
+}
+
 @layer base {
   * {
     @apply border-border outline-ring/50;
diff --git a/src/app/layout.tsx b/src/app/layout.tsx
index e9545eb..a485423 100755
--- a/src/app/layout.tsx
+++ b/src/app/layout.tsx
@@ -1,5 +1,6 @@
 import type { Metadata } from "next";
 import { Geist, Geist_Mono } from "next/font/google";
+import { ThemeProvider } from "next-themes";
 import "./globals.css";
 import { Toaster } from "@/components/ui/toaster";
 import { APP_NAME, APP_SHORT, APP_VERSION } from "@/lib/version";
@@ -30,12 +31,21 @@ export default function RootLayout({
   children: React.ReactNode;
 }>) {
   return (
-    <html lang="en" className="dark" suppressHydrationWarning>
+    <html lang="en" suppressHydrationWarning>
       <body
         className={`${geistSans.variable} ${geistMono.variable} antialiased bg-zinc-950 text-zinc-100 font-sans`}
       >
-        {children}
-        <Toaster />
+        {/* class strategy: next-themes puts "dark" (default) or "light" on
+            <html> pre-paint; globals.css remaps the palettes under .light */}
+        <ThemeProvider
+          attribute="class"
+          defaultTheme="dark"
+          enableSystem={false}
+          disableTransitionOnChange
+        >
+          {children}
+          <Toaster />
+        </ThemeProvider>
       </body>
     </html>
   );
diff --git a/src/components/ava/beat-tab.tsx b/src/components/ava/beat-tab.tsx
index a5a9ace..1ceffa2 100755
--- a/src/components/ava/beat-tab.tsx
+++ b/src/components/ava/beat-tab.tsx
@@ -74,7 +74,7 @@ export function BeatTab() {
         type="button"
         whileTap={{ scale: 0.965 }}
         onClick={tapBeat}
-        className="flex h-14 w-full flex-col items-center justify-center gap-0.5 rounded-xl bg-emerald-400 font-bold text-zinc-950 shadow-[0_0_24px_rgba(52,211,153,0.28)] transition-colors hover:bg-emerald-300"
+        className="flex h-14 w-full flex-col items-center justify-center gap-0.5 rounded-xl bg-emerald-400 font-bold text-emerald-950 shadow-[0_0_24px_rgba(52,211,153,0.28)] transition-colors hover:bg-emerald-300"
         title="Tap to set the tempo (or press Space)"
       >
         <span className="flex items-center gap-2 text-sm font-bold tracking-[0.12em]">
diff --git a/src/components/ava/header.tsx b/src/components/ava/header.tsx
index 357c1b6..fbc7178 100755
--- a/src/components/ava/header.tsx
+++ b/src/components/ava/header.tsx
@@ -1,13 +1,16 @@
-// AVA — sticky app header: logo, audio source controls (segmented), demo BPM
-// slider, BPM readout, and the beat indicator + "Set Beat" button side by side
-// (hard requirement: that pairing is always visible in the header).
+// OVE — sticky app header: logo, audio source controls (segmented), demo BPM
+// slider, theme tick switch, BPM readout, and the beat indicator + "Set Beat"
+// button side by side (hard requirement: that pairing is always visible in
+// the header).
 
 'use client'
 
-import { useRef } from 'react'
-import { AudioWaveform, Disc3, FileAudio, Link2, Mic, Square, Timer } from 'lucide-react'
+import { useRef, useSyncExternalStore } from 'react'
+import { AudioWaveform, Disc3, FileAudio, Link2, Mic, Moon, Square, Sun, Timer } from 'lucide-react'
+import { useTheme } from 'next-themes'
 import { Button } from '@/components/ui/button'
 import { Slider } from '@/components/ui/slider'
+import { Switch } from '@/components/ui/switch'
 import { BeatDot } from '@/components/ava/beat-dot'
 import { LinkDialog } from '@/components/ava/link-dialog'
 import { tapBeat, useAudioSource } from '@/components/ava/audio-source'
@@ -140,6 +143,36 @@ function BpmReadout() {
   )
 }
 
+/**
+ * Light-switch tick: left position (unchecked) keeps the dark theme, flipping
+ * right (checked) switches the page to the white theme. Persisted per visitor
+ * by next-themes (localStorage). The useSyncExternalStore mount guard returns
+ * false on the server / first client render and true after hydration, so the
+ * checkbox never causes a hydration mismatch.
+ */
+const emptySubscribe = () => () => {}
+function ThemeToggle() {
+  const { resolvedTheme, setTheme } = useTheme()
+  const mounted = useSyncExternalStore(emptySubscribe, () => true, () => false)
+  const isLight = mounted && resolvedTheme === 'light'
+
+  return (
+    <div
+      className="flex h-11 items-center gap-1.5 rounded-lg border border-zinc-800 bg-zinc-900/60 px-2.5"
+      title={isLight ? 'Theme: light — flip left for dark' : 'Theme: dark — flip right for light'}
+    >
+      <Moon className="size-3.5 shrink-0 text-zinc-500" aria-hidden />
+      <Switch
+        checked={isLight}
+        onCheckedChange={(v) => setTheme(v ? 'light' : 'dark')}
+        aria-label={isLight ? 'Switch to dark theme' : 'Switch to light theme'}
+        className="data-[state=checked]:bg-emerald-400 data-[state=unchecked]:bg-zinc-600"
+      />
+      <Sun className="size-3.5 shrink-0 text-zinc-500" aria-hidden />
+    </div>
+  )
+}
+
 export function AppHeader() {
   return (
     <header className="sticky top-0 z-40 border-b border-zinc-800/80 bg-zinc-950/80 backdrop-blur supports-[backdrop-filter]:bg-zinc-950/60">
@@ -147,7 +180,7 @@ export function AppHeader() {
         {/* logo */}
         <div className="order-1 flex items-center gap-2.5">
           <div className="grid size-9 place-items-center rounded-lg bg-emerald-400 shadow-[0_0_16px_rgba(52,211,153,0.35)]">
-            <AudioWaveform className="size-5 text-zinc-950" aria-hidden />
+            <AudioWaveform className="size-5 text-emerald-950" aria-hidden />
           </div>
           <div>
             <h1 className="text-base font-bold leading-none tracking-wide">{APP_SHORT}</h1>
@@ -162,13 +195,14 @@ export function AppHeader() {
           <SourceControls />
         </div>
 
-        {/* BPM readout + beat indicator + Set Beat — always paired, always visible */}
+        {/* theme switch + BPM readout + beat indicator + Set Beat — always visible */}
         <div className="order-2 ml-auto flex items-center gap-2.5 md:order-3 sm:gap-3">
+          <ThemeToggle />
           <BpmReadout />
           <BeatDot size={44} />
           <Button
             onClick={tapBeat}
-            className="h-11 gap-1.5 bg-emerald-400 px-3 font-semibold text-zinc-950 hover:bg-emerald-300 sm:px-4"
+            className="h-11 gap-1.5 bg-emerald-400 px-3 font-semibold text-emerald-950 hover:bg-emerald-300 sm:px-4"
             title="Tap to set the tempo (or press Space)"
           >
             <Timer className="size-4" />
diff --git a/src/components/ava/help-panel.tsx b/src/components/ava/help-panel.tsx
index 34427e4..4cbadb4 100755
--- a/src/components/ava/help-panel.tsx
+++ b/src/components/ava/help-panel.tsx
@@ -65,7 +65,7 @@ function HelpTable({ rows, mono = true }: { rows: [string, string][]; mono?: boo
         {rows.map(([name, desc]) => (
           <tr key={name} className="border-b border-zinc-800/60 last:border-0 align-top">
             <td
-              className={`py-1 pr-3 whitespace-nowrap text-emerald-300/90 ${mono ? 'font-mono text-[11px]' : 'text-xs'}`}
+              className={`py-1 pr-3 whitespace-nowrap text-emerald-400/90 ${mono ? 'font-mono text-[11px]' : 'text-xs'}`}
             >
               {name}
             </td>
@@ -93,15 +93,15 @@ export function HelpPanel() {
         <ol className="list-inside list-decimal space-y-1 text-[11px] leading-relaxed text-zinc-400">
           <li>Write header keys (name, mode, blend, persist, linewidth) at the top.</li>
           <li>
-            Put setup code in <span className="font-mono text-emerald-300/90">[init]</span>, per-frame code in{' '}
-            <span className="font-mono text-emerald-300/90">[frame]</span>, reactions in{' '}
-            <span className="font-mono text-emerald-300/90">[beat]</span>, and the geometry in{' '}
-            <span className="font-mono text-emerald-300/90">[point]</span>.
+            Put setup code in <span className="font-mono text-emerald-400/90">[init]</span>, per-frame code in{' '}
+            <span className="font-mono text-emerald-400/90">[frame]</span>, reactions in{' '}
+            <span className="font-mono text-emerald-400/90">[beat]</span>, and the geometry in{' '}
+            <span className="font-mono text-emerald-400/90">[point]</span>.
           </li>
           <li>
-            Set <span className="font-mono text-emerald-300/90">n</span> (point count) in [init], drive it with{' '}
-            <span className="font-mono text-emerald-300/90">bass</span>,{' '}
-            <span className="font-mono text-emerald-300/90">beat</span> and <span className="font-mono text-emerald-300/90">v</span>.
+            Set <span className="font-mono text-emerald-400/90">n</span> (point count) in [init], drive it with{' '}
+            <span className="font-mono text-emerald-400/90">bass</span>,{' '}
+            <span className="font-mono text-emerald-400/90">beat</span> and <span className="font-mono text-emerald-400/90">v</span>.
           </li>
           <li>Hit Apply ▶ — errors are flagged next to the exact line.</li>
         </ol>
@@ -118,15 +118,15 @@ export function HelpPanel() {
       <HelpSection title="Functions">
         <HelpTable rows={FUNCS} />
         <p className="mt-2 text-[11px] text-zinc-500">
-          Constants: <span className="font-mono text-emerald-300/90">pi tau e</span>
+          Constants: <span className="font-mono text-emerald-400/90">pi tau e</span>
         </p>
       </HelpSection>
 
       <HelpSection title="Operators">
         <p className="font-mono text-[11px] leading-relaxed text-zinc-400">
           + - * / % ^ &nbsp;(power) &nbsp;·&nbsp; == != &lt; &lt;= &gt; &gt;= &nbsp;·&nbsp; &amp;&amp; || ! &nbsp;·&nbsp;
-          ternary <span className="text-emerald-300/90">c ? a : b</span> &nbsp;·&nbsp; assignment{' '}
-          <span className="text-emerald-300/90">=</span> (works inside if() and ternary branches)
+          ternary <span className="text-emerald-400/90">c ? a : b</span> &nbsp;·&nbsp; assignment{' '}
+          <span className="text-emerald-400/90">=</span> (works inside if() and ternary branches)
         </p>
         <p className="mt-1.5 text-[11px] leading-relaxed text-zinc-500">
           Statements are separated by newlines or semicolons. Comments start with <span className="font-mono">{'#'}</span> or{' '}
@@ -137,7 +137,7 @@ export function HelpPanel() {
       <HelpSection title="Example formulas">
         <div className="space-y-1.5">
           {EXAMPLES.map(([code, note]) => (
-            <div key={code} className="flex flex-col gap-0.5 rounded border border-zinc-800/70 bg-black/40 px-2.5 py-1.5">
+            <div key={code} className="flex flex-col gap-0.5 rounded border border-zinc-800/70 bg-zinc-800/40 px-2.5 py-1.5">
               <code className="font-mono text-[11px] text-zinc-200">{code}</code>
               <span className="text-[10px] text-zinc-500">{note}</span>
             </div>
@@ -149,7 +149,7 @@ export function HelpPanel() {
         <p className="mb-2 text-[11px] leading-relaxed text-zinc-400">
           A plain-text file: optional header keys before the first section, then any of the four sections in any order.
         </p>
-        <pre className="overflow-x-auto rounded border border-zinc-800/70 bg-black/40 p-2.5 font-mono text-[11px] leading-relaxed text-zinc-300">
+        <pre className="overflow-x-auto rounded border border-zinc-800/70 bg-zinc-800/40 p-2.5 font-mono text-[11px] leading-relaxed text-zinc-300">
 {`# header keys
 name: My Visualization
 author: you
diff --git a/src/components/ava/link-dialog.tsx b/src/components/ava/link-dialog.tsx
index 7e8c260..536caac 100755
--- a/src/components/ava/link-dialog.tsx
+++ b/src/components/ava/link-dialog.tsx
@@ -150,7 +150,7 @@ function LinkDialogBody() {
         <Button
           type="submit"
           disabled={busy || !url.trim()}
-          className="shrink-0 gap-1.5 bg-emerald-400 font-semibold text-zinc-950 hover:bg-emerald-300"
+          className="shrink-0 gap-1.5 bg-emerald-400 font-semibold text-emerald-950 hover:bg-emerald-300"
         >
           {busy ? <Loader2 className="size-4 animate-spin" aria-hidden /> : null}
           {busy ? 'Loading' : 'Load'}
diff --git a/src/components/ava/native-tab.tsx b/src/components/ava/native-tab.tsx
index a2421f9..0f19a87 100755
--- a/src/components/ava/native-tab.tsx
+++ b/src/components/ava/native-tab.tsx
@@ -21,14 +21,14 @@ export function NativeTab() {
       <a
         href="/api/rust-scaffold"
         download
-        className="flex h-12 items-center justify-center gap-2 rounded-xl bg-emerald-400 font-semibold text-zinc-950 shadow-[0_0_20px_rgba(52,211,153,0.25)] transition-colors hover:bg-emerald-300"
+        className="flex h-12 items-center justify-center gap-2 rounded-xl bg-emerald-400 font-semibold text-emerald-950 shadow-[0_0_20px_rgba(52,211,153,0.25)] transition-colors hover:bg-emerald-300"
       >
         <Download className="size-4" />
         Download Rust Scaffold (.zip)
       </a>
       <p className="text-[11px] text-zinc-500">{BLUEPRINT.downloadNote}</p>
 
-      <blockquote className="rounded-lg border border-emerald-400/20 bg-emerald-400/5 p-3 text-[11px] leading-relaxed text-emerald-200/80">
+      <blockquote className="rounded-lg border border-emerald-400/20 bg-emerald-400/5 p-3 text-[11px] leading-relaxed text-emerald-700/90 dark:text-emerald-200/80">
         The <span className="font-mono">.ava</span> scripts you write here run on both the web edition and the native
         Rust engine — the script language is identical.
       </blockquote>
diff --git a/src/components/ava/presets-tab.tsx b/src/components/ava/presets-tab.tsx
index 2f7e036..c36c112 100755
--- a/src/components/ava/presets-tab.tsx
+++ b/src/components/ava/presets-tab.tsx
@@ -418,7 +418,7 @@ function NameDialog({
             Cancel
           </Button>
           <Button
-            className="h-9 gap-1.5 bg-emerald-400 text-zinc-950 hover:bg-emerald-300"
+            className="h-9 gap-1.5 bg-emerald-400 text-emerald-950 hover:bg-emerald-300"
             disabled={busy}
             onClick={() => void submit()}
           >
@@ -812,7 +812,7 @@ export function PresetsTab() {
                 <Button
                   size="sm"
                   onClick={() => loadPreset(selectedPreset)}
-                  className="h-9 w-full gap-1.5 bg-emerald-400 text-zinc-950 hover:bg-emerald-300"
+                  className="h-9 w-full gap-1.5 bg-emerald-400 text-emerald-950 hover:bg-emerald-300"
                   title="Run this preset on the engine and open it in the editor"
                 >
                   <Play className="size-3.5" /> Load Preset
@@ -962,7 +962,7 @@ export function PresetsTab() {
                 checked={randomize}
                 onCheckedChange={(v) => useAvaStore.getState().setRandomize(v === true)}
                 aria-label="Randomize presets"
-                className="size-4 data-[state=checked]:border-emerald-400 data-[state=checked]:bg-emerald-400 data-[state=checked]:text-zinc-950"
+                className="size-4 data-[state=checked]:border-emerald-400 data-[state=checked]:bg-emerald-400 data-[state=checked]:text-emerald-950"
               />
               <Label htmlFor="ava-randomize" className="cursor-pointer text-xs text-zinc-300">
                 Randomize
diff --git a/src/components/ava/script-tab.tsx b/src/components/ava/script-tab.tsx
index 142e6ed..7c7c35e 100755
--- a/src/components/ava/script-tab.tsx
+++ b/src/components/ava/script-tab.tsx
@@ -278,7 +278,7 @@ export function ScriptTab() {
         <Button
           size="sm"
           onClick={apply}
-          className="h-9 gap-1.5 bg-emerald-400 px-3 text-zinc-950 hover:bg-emerald-300"
+          className="h-9 gap-1.5 bg-emerald-400 px-3 text-emerald-950 hover:bg-emerald-300"
           title="Validate and apply to the engine"
         >
           <Play className="size-3.5" /> Apply
@@ -288,7 +288,7 @@ export function ScriptTab() {
             size="sm"
             onClick={() => void saveToTarget()}
             disabled={saving}
-            className="h-9 gap-1.5 bg-emerald-400 px-3 text-zinc-950 hover:bg-emerald-300"
+            className="h-9 gap-1.5 bg-emerald-400 px-3 text-emerald-950 hover:bg-emerald-300"
             title={`Overwrite "${editTarget.name}" with the current editor script`}
           >
             <Save className="size-3.5" /> Save
@@ -440,7 +440,7 @@ export function ScriptTab() {
               Cancel
             </Button>
             <Button
-              className="h-9 gap-1.5 bg-emerald-400 text-zinc-950 hover:bg-emerald-300"
+              className="h-9 gap-1.5 bg-emerald-400 text-emerald-950 hover:bg-emerald-300"
               disabled={saveAsBusy}
               onClick={() => void saveAsCopy()}
             >
diff --git a/src/components/ava/visual-stage.tsx b/src/components/ava/visual-stage.tsx
index 6897068..f25de75 100755
--- a/src/components/ava/visual-stage.tsx
+++ b/src/components/ava/visual-stage.tsx
@@ -108,7 +108,7 @@ export function VisualStage({ className }: { className?: string }) {
               <div className="grid gap-2.5">
                 <Button
                   onClick={() => void startDemo()}
-                  className="h-12 gap-2 bg-emerald-400 text-zinc-950 hover:bg-emerald-300"
+                  className="h-12 gap-2 bg-emerald-400 text-emerald-950 hover:bg-emerald-300"
                 >
                   <Disc3 className="size-4" /> Demo Track
                 </Button>
diff --git a/src/lib/version.ts b/src/lib/version.ts
index 96f6122..40b7106 100755
--- a/src/lib/version.ts
+++ b/src/lib/version.ts
@@ -7,6 +7,8 @@
 // (v6.0 = rename to Open Visualization Engine + version indicator).
 //
 // History:
+//   6.3 — light/dark theme tick switch in the header (white theme via .light
+//         palette remap; per-visitor, persisted by next-themes)
 //   6.2 — security hardening: read-only embedded library (server refuses all
 //         writes) + per-visitor "user created" presets stored in the browser
 //   6.1 — preset library quality pass: every embedded stand-in is now a UNIQUE
@@ -17,4 +19,4 @@
 
 export const APP_NAME = 'Open Visualization Engine'
 export const APP_SHORT = 'OVE'
-export const APP_VERSION = '6.2'
+export const APP_VERSION = '6.3'
diff --git a/tool-results/e2e-v63/01-dark-default.png b/tool-results/e2e-v63/01-dark-default.png
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diff --git a/tool-results/e2e-v63/03-light-after-toggle.png b/tool-results/e2e-v63/03-light-after-toggle.png
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diff --git a/tool-results/e2e-v63/03b-light-toggle-checked.png b/tool-results/e2e-v63/03b-light-toggle-checked.png
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diff --git a/tool-results/e2e-v63/07-light-script.png b/tool-results/e2e-v63/07-light-script.png
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diff --git a/tool-results/e2e-v63/09-light-detect.png b/tool-results/e2e-v63/09-light-detect.png
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diff --git a/tool-results/e2e-v63/10-light-beat.png b/tool-results/e2e-v63/10-light-beat.png
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@@ -0,0 +1,1033 @@
+     1→# Worklog — AVA (Advanced Visualization Agent)
+     2→
+     3→Project: Audio-reactive visualization agent (AVS-style scripting, 3-band spectrum detection,
+     4→predictive beat tracking). Built as a Next.js 16 web app (reference implementation) plus a
+     5→Rust/Vulkan scaffold for the future native cross-platform export.
+     6→
+     7→User requirements:
+     8→- 3-band detection: Bass 20–100 Hz, Mid 700 Hz–2 kHz, High 7 kHz–16 kHz (user-adjustable)
+     9→- Beat detection from bass + beat PREDICTION (keeps beat when bass drops out)
+    10→- Green dot beat indicator + "Set Beat" tap-tempo button
+    11→- AVS-style custom visualization script editor: edit, save as default, save to file, load from file
+    12→- Help section with variables/functions reference
+    13→- 5 preset scripts (user provided real Winamp AVS presets on Google Drive)
+    14→- Rust + Vulkan target for Linux/Windows/macOS export (scaffold + blueprint delivered here)
+    15→
+    16→---
+    17→Task ID: 1
+    18→Agent: main (Z.ai Code)
+    19→Task: Project inspection + Google Drive preset retrieval
+    20→
+    21→Work Log:
+    22→- Verified dev server running on port 3000 (Next.js 16.1.3, dev.log clean)
+    23→- Fetched Google Drive folder (public) — extracted 5 file IDs and downloaded all files:
+    24→  - "Synth-C - Gap The Mind.avs" (12.5 KB)
+    25→  - "zamuz - wonder 'bout.avs" (34 KB)
+    26→  - "Synth-C - Quantization.avs" (14.8 KB)
+    27→  - "zamuz - keep tryin'.avs" (19 KB)
+    28→  - "zamuz - vorticity (brain activity remix).avs" (17 KB)
+    29→- Parsed binary AVS format (null-terminated strings): extracted Superscope code, Texer II
+    30→  configs, movement expressions. These are scene classics from visbot.net.
+    31→- Decided engine design: AVS-eel-flavored expression language (if/above/below/equal/rand,
+    32→  getspec/getosc-equivalents sv/v, reg-free flat variables) so the presets port naturally.
+    33→
+    34→Stage Summary:
+    35→- All 5 original presets secured and understood; will be adapted to the AVA script dialect
+    36→  (originals preserved as downloadable files in public/avs-originals/).
+    37→- Core engine architecture defined: expression compiler, script parser, BeatTracker (PLL-style
+    38→  predictor + tap tempo), AudioEngine (WebAudio FFT, mic/file/demo synth), canvas renderer.
+    39→
+    40→---
+    41→Task ID: 2
+    42→Agent: main (Z.ai Code)
+    43→Task: Project setup — deps, Prisma schema, DB, original preset files
+    44→
+    45→Work Log:
+    46→- Installed jszip (for the Rust scaffold zip download API)
+    47→- Prisma schema rewritten: `Preset` (name/author/description/content/isBuiltIn, unique name)
+    48→  and `Settings` (defaultScript + bandConfig + beatConfig JSON) — ran `bun run db:push` OK
+    49→- Copied the 5 original Winamp .avs binaries to public/avs-originals/ (downloadable from UI)
+    50→
+    51→Stage Summary:
+    52→- DB ready; jszip available; originals served at /avs-originals/*.avs
+    53→
+    54→---
+    55→Task ID: 3
+    56→Agent: main (Z.ai Code)
+    57→Task: AVA core engine libraries (src/lib/ava/*)
+    58→
+    59→Work Log:
+    60→- types.ts — BandConfig / BeatConfig / BandLevels / BeatFrame + defaults
+    61→  (bass 20–100 Hz, mid 700–2000 Hz, high 7000–16000 Hz as requested)
+    62→- expression.ts — full expression compiler: tokenizer → recursive-descent parser → closure
+    63→  tree. AVS-eel flavored: if() is LAZY, && / || short-circuit, ternary, ^ power (right-assoc),
+    64→  assignment valid inside call args + ternary branches (if(cond, x=1, x=2) works),
+    65→  newline & ';' statement separators (newlines inside parens ignored), '#'/'//' comments,
+    66→  deterministic hash rand(seed). 30+ functions incl. above/below/equal/band/bor/bnot/frac.
+    67→- script.ts — text format parser: header keys (name/author/description/mode/blend/persist/
+    68→  linewidth) + [init]/[frame]/[beat]/[point] sections, error objects with section+line,
+    69→  validateScript() never throws.
+    70→- beat.ts — BeatTracker: rolling-average energy detection w/ threshold+minInterval+floor,
+    71→  interval learning (median + EMA period lock, spread gating), PLL-style phase predictor that
+    72→  keeps firing beats when bass drops (confidence-gated, slowly decays), tap() tempo learning.
+    73→- audio.ts — AudioEngine: WebAudio AnalyserNode FFT 8192 (~5.4 Hz bins), byte-spectrum band
+    74→  averaging with attack 35ms / release 220ms smoothing; sources: demo (synthesized techno:
+    75→  kick 160→43Hz sweep, snare bandpass 1.8k, hats HP 8.2k, saw bassline — audible + analyzable),
+    76→  mic (never routed to speakers), file (loops, audible). getWave/getSpectrum for scripts.
+    77→- presets.ts — 5 built-in presets ADAPTED from the user's real AVS files:
+    78→  Gap The Mind (radial warp rings), wonder 'bout (bass-spawned expanding rings),
+    79→  Quantization (grid-snapped dot rings), keep tryin' (bass burst dots + swirl),
+    80→  vorticity (twisting spiral arms) + STARTER_TEMPLATE.
+    81→- engine.ts — AvaEngine: rAF loop (bands → beat → env → frame/beat progs → point prog ×N →
+    82→  draw), canvas 2d renderer with additive blending, per-point color, 2-pass glow,
+    83→  persistence trails, lines/dots/solid modes, DPR-aware resize via ResizeObserver,
+    84→  throttled stats callback for the UI. Singleton via getEngine().
+    85→- SMOKE TESTED via bun script: all 5 presets parse & execute 120 frames; lazy-if/ternary/pow
+    86→  OK; beat sim locks 124.1 BPM from 124 BPM kick train; predictor sustains beats through 10s
+    87→  of silence; tap tempo locks 120 BPM from 500ms taps. (2 parser bugs found & fixed: assignment
+    88→  inside call args; newline statement separators with paren-awareness.)
+    89→
+    90→Stage Summary:
+    91→- Core engine complete and verified. Env variables exposed to scripts: n, t, time, dt, frame,
+    92→  bass/mid/treb (+ _att), vol (+ _att), beat, bpm, beatphase, beatconf, beats, w, h, aspect,
+    93→  persist, i, v, sv, x, y, red, green, blue, skip, size, alpha.
+    94→
+    95→---
+    96→Task ID: 4
+    97→Agent: main (Z.ai Code)
+    98→Task: API routes
+    99→
+   100→Work Log:
+   101→- GET/POST /api/presets — GET seeds built-ins on first run and lists all; POST upserts user
+   102→  presets by name (built-ins protected, 409 on name clash with built-in)
+   103→- PUT/DELETE /api/presets/[id] — user presets only
+   104→- GET/PUT /api/settings — defaultScript + bandConfig + beatConfig (upsert, JSON strings in DB)
+   105→- Created src/lib/ava/blueprint.ts STUB (interface Blueprint + placeholder) for Task 3-b
+   106→
+   107→Stage Summary:
+   108→- Backend complete. Frontend contract: GET /api/presets → { presets: [...] };
+   109→  POST /api/presets {name, content, author?, description?} → {preset};
+   110→  GET /api/settings → { defaultScript, bandConfig, beatConfig };
+   111→  PUT /api/settings { defaultScript? , bandConfig?, beatConfig? }.
+   112→
+   113→
+   114→---
+   115→Task ID: 3-a
+   116→Agent: full-stack-developer (UI)
+   117→Task: Complete UI for AVA — single-page app (dark club/VJ aesthetic) with header
+   118→(audio source controls, BPM readout, green beat dot + Set Beat pairing), visual
+   119→stage (canvas + engine loop), 5-tab control panel (Presets / Script / Detect /
+   120→Beat / Native) and sticky footer status bar.
+   121→
+   122→Work Log:
+   123→- Read worklog + all engine APIs (types/engine/script/presets/blueprint/audio/beat)
+   124→  and the existing API routes before writing any code.
+   125→- src/lib/store.ts — zustand store: throttled stats (AvaStats = EngineStats +
+   126→  beatCount), beatFlash pulses, bandConfig/beatConfig mirrors that write the
+   127→  engine live + persist (localStorage instant, PUT /api/settings debounced 600 ms
+   128→  with shape guards), preset list + refreshPresets(), script text, active tab.
+   129→- src/components/ava/audio-source.ts — tapBeat() (engine.beat.tap + dot flash +
+   130→  lastTap), applyScriptText() (validate → setScript, engine.setScript), and
+   131→  useAudioSource() hook wrapping startDemo/startMic/startFile/stop with error
+   132→  mapping (mic permission / no device / decode failure → destructive toast) and
+   133→  store sync from engine.audio.kind (authoritative).
+   134→- src/components/ava/beat-dot.tsx — the green indicator: SVG phase ring
+   135→  (stroke-dashoffset follows beat.phase, 150 ms linear transition), emerald dot
+   136→  that scales 1.9× + glows 180 ms on audio/tap beats, and for predicted beats an
+   137→  expanding outline ring (framer-motion, 450 ms) + "PRED" badge. Flash state is
+   138→  derived (seq vs clearedSeq) — no setState-in-effect.
+   139→- src/app/page.tsx — useInitialLoad (presets + settings; server → localStorage →
+   140→  first preset → STARTER_TEMPLATE fallback chain; applies configs + script),
+   141→  useBeatWatcher (see decisions below), useSpaceToTap (Space outside
+   142→  inputs/textarea/select/button → tap, preventDefault). Root layout:
+   143→  min-h-screen flex-col, lg:h-screen with internal panel scroll (footer always
+   144→  at viewport bottom; mobile pushes footer naturally).
+   145→- src/components/ava/header.tsx — sticky, backdrop-blur; emerald logo square +
+   146→  AVA title + subtitle (hidden on mobile); segmented Demo/Mic/File/Stop control
+   147→  (44 px targets, active state emerald, hidden file input); demo BPM slider
+   148→  (60–200, only while demo active); right cluster = BPM readout (mono, emerald,
+   149→  '—' when unknown) + BeatDot + Set Beat button, always visible, wraps to row 1
+   150→  on mobile (source controls wrap to row 2).
+   151→- src/components/ava/visual-stage.tsx — owns engine lifecycle (engine.start/
+   152→  stop + onStats → store), idle glass overlay with 3 big source buttons
+   153→  (AnimatePresence fade), top-left FPS/PTS readout (pointer-events-none), top-
+   154→  right fullscreen toggle (requestFullscreen on container). Canvas absolute
+   155→  fill; engine's ResizeObserver handles DPR.
+   156→- src/components/ava/presets-tab.tsx — preset cards (name/author/description
+   157→  line-clamp-3, mode + built-in/custom badges), Load (applies + toasts, jumps
+   158→  to Script tab on compile error), ".avs original" download link for built-ins
+   159→  via originalFileUrl(name), two-step Delete (3 s confirm timeout) for customs,
+   160→  "New Script" (STARTER_TEMPLATE + switch tab), save-as-preset section (POST,
+   161→  409 handled, refresh + toast). List: max-h-96 + thin styled scrollbar.
+   162→- src/components/ava/script-tab.tsx — toolbar (Apply ▶ / Save as Default 💾 /
+   163→  Save to File ⬇ Blob download <meta.name>.ava / Load from File 📂 (.ava,.avs,
+   164→  .txt, auto-applies when valid) / New / Help ?), gutter+textarea editor
+   165→  (synced scroll, Tab → 2 spaces, min-h-320, wrap=off), rose gutter line on the
+   166→  error line, live debounced validation (250 ms), status line "✔ Compiled OK —
+   167→  mode: lines, n=480" (n from running [init] on a scratch env) / compile error
+   168→  / stats.error runtime errors.
+   169→- src/components/ava/help-panel.tsx — Quick Start, full variables table (frame
+   170→  + point-only), functions table, operators, 5 example formulas, .ava file
+   171→  format doc.
+   172→- src/components/ava/detect-tab.tsx — Bass/Mid/High cards: Low/High Hz sliders
+   173→  (bass 10–300/20–500, mid 100–5000/300–8000, high 1000–12000/4000–20000; low <
+   174→  high enforced with min gaps 10/50/200 in the store), Gain 0.1–4, mono Hz
+   175→  readouts, live VU meters (instant fill emerald/amber/rose + _att peak-hold
+   176→  tick), per-band reset.
+   177→- src/components/ava/beat-tab.tsx — 80 px BeatDot + source badge (AUDIO/PRED/
+   178→  TAP), big BPM readout, large SET BEAT button (framer-motion whileTap), tap
+   179→  feedback ("Tap 3… keep tapping" → "Locked: 128.0 BPM"), confidence bar, beat
+   180→  count, sensitivity (threshold 1.1–2.5, "lower = more sensitive"), min
+   181→  interval 150–600 ms, prediction switch ("Keeps the beat alive when the bass
+   182→  drops out"), how-it-works explainer.
+   183→- src/components/ava/native-tab.tsx — renders BLUEPRINT (title/intro/sections/
+   184→  bullets/code blocks in scrollable pre), emerald "Download Rust Scaffold
+   185→  (.zip)" <a href="/api/rust-scaffold" download>, identical-language note.
+   186→- src/components/ava/footer-bar.tsx — sticky mt-auto status bar: SRC/FPS/PTS/
+   187→  BPM/SCRIPT micro-stats (mono), green "engine ok" / pulsing red "script error".
+   188→- src/app/layout.tsx — dark class on <html>, title "AVA — Advanced
+   189→  Visualization Agent", body bg-zinc-950.
+   190→- FIXED BUGS during browser testing: (1) Detect tab crashed — levels key for
+   191→  the high band is `treb` not `high` (added levelKey/attKey mapping to BandSpec);
+   192→  (2) lint: setState-in-effect in BeatDot (derived flash state instead);
+   193→  (3) lint: // text node in help panel.
+   194→- Tuned src/hooks/use-toast.ts: TOAST_LIMIT 1→3, TOAST_REMOVE_DELAY 100 s→5 s
+   195→  (lingering toasts were covering header/panel buttons during testing).
+   196→- VERIFIED in headless browser: initial load seeds presets + applies Gap The
+   197→  Mind (480 pts @60 fps); demo start/stop + DEMO slider; beat dot flashing live
+   198→  (scale 1↔1.9); tap tempo lock ("Locked: 119.9 BPM" from 4×500 ms taps, Space
+   199→  key too); after Stop the PRED badge/outline ring shows prediction carrying
+   200→  the beat; preset load/save/delete (two-step) round-trip via API; Save as
+   201→  Default → PUT /api/settings + localStorage; band slider → debounced PUT;
+   202→  .avs originals serve 200; script upload (auto-apply, n=300) + export to
+   203→  Upload Test.ava; mic error toast ("No microphone found" in this headless
+   204→  env); no blue/indigo anywhere; lint clean; tsc clean for owned files.
+   205→
+   206→Stage Summary:
+   207→- Files created: src/lib/store.ts; src/components/ava/{shared.ts, audio-source.ts,
+   208→  beat-dot.tsx, header.tsx, visual-stage.tsx, presets-tab.tsx, script-tab.tsx,
+   209→  help-panel.tsx, detect-tab.tsx, beat-tab.tsx, native-tab.tsx, footer-bar.tsx,
+   210→  control-panel.tsx}. Modified: src/app/page.tsx (replaced), src/app/layout.tsx,
+   211→  src/hooks/use-toast.ts (toast duration/limit only).
+   212→- KEY DECISION — beat flash sampling: engine stats are throttled (~8 Hz) but
+   213→  beat=true lasts one frame, so most beats are invisible in stats. The watcher
+   214→  in page.tsx ALSO fires on beat.phase running backwards (real beats reset
+   215→  phase to 0; the predictor grid wraps at 1). Classification: stats.beat.beat
+   216→  sampled → exact source; phase drop + prediction on + confidence > 0.35 +
+   217→  bassAtt < 0.06 → 'predicted'; phase drop + bassAtt > 0.05 → 'audio'; silent
+   218→  no-lock → no flash (idle dot doesn't pulse). Tap flashes suppressed for
+   219→  300 ms to avoid double pulses. Verified working in-browser.
+   220→- KEY DECISION — desktop uses lg:h-screen + internal panel scroll so the footer
+   221→  stays at the viewport bottom and the canvas fills the height; mobile uses
+   222→  natural flow (min-h-screen + mt-auto footer) so the footer is pushed down.
+   223→- Store is the only place configs touch the engine (applyBandConfig/
+   224→  setBandValue etc.), keeping live-update + persistence consistent everywhere.
+   225→- NOTE for Task 5 (integration): /api/rust-scaffold is linked from the Native
+   226→  tab but the route does not exist yet (Task 3-b owns it — expect 404 until
+   227→  then). BLUEPRINT is still the stub; the Native tab renders whatever 3-b puts
+   228→  in it, no UI changes needed. Settings row 'main' currently holds
+   229→  defaultScript="Gap The Mind" + default bandConfig from testing (both equal
+   230→  defaults — safe to leave or clear). Pre-existing tsc errors in
+   231→  src/lib/ava/{audio,script}.ts and examples/ are NOT from this task
+   232→  (ignoreBuildErrors is set).
+   233→
+   234→---
+   235→Task ID: 3-b
+   236→Agent: general-purpose (Rust scaffold + blueprint) — [timed out at the very end;
+   237→        deliverables verified complete by the main agent, which appends this entry]
+   238→
+   239→Task: Rust/Vulkan native-export scaffold + architecture blueprint + zip download API
+   240→
+   241→Work Log:
+   242→- Built rust-agent/ cargo crate (ava-agent, edition 2021): winit 0.30 (ApplicationHandler
+   243→  API), wgpu 22 (Vulkan-first; `vulkan-force` feature for MoltenVK on macOS), cpal 0.15,
+   244→  rustfft 6.2, pollster, anyhow
+   245→- src/audio.rs — cpal default-input capture, ring buffer, AudioProcessor::poll() per frame
+   246→- src/spectrum.rs — Hann-window 8192 FFT, band levels w/ same attack(35ms)/release(220ms)
+   247→  smoothing as the web engine
+   248→- src/beat.rs — 1:1 port of beat.ts (same constants, median+EMA lock, PLL predictor, taps)
+   249→- src/script/{lexer,parser,env,mod}.rs — expression engine + .ava format parser with the
+   250→  same lazy-if / assignment-in-args / deterministic-rand semantics
+   251→- src/engine.rs — script runtime host (init/frame/beat/point stepping, shared state)
+   252→- src/render/{mod.rs,shader.wgsl} — wgpu pipelines: audio-reactive fullscreen background +
+   253→  additive point cloud, #[repr(C)] uniforms, persistence via TODO'd feedback texture
+   254→- presets/*.ava — all six scripts (5 classics + starter) portable across engines
+   255→- Rewrote src/lib/ava/blueprint.ts with 8 real sections (architecture map, wgpu/Vulkan
+   256→  strategy, audio pipeline, beat engine, script engine, rendering, per-platform builds,
+   257→  roadmap)
+   258→- Built src/app/api/rust-scaffold/route.ts (jszip walk, skip target/.git/node_modules)
+   259→
+   260→Stage Summary:
+   261→- Scaffold ~1,700 lines, all files present; zip route verified 200 in dev.log; lint clean.
+   262→- NOT compiled (no cargo in sandbox) — scaffold quality, clearly TODO-marked where partial.
+   263→
+   264→---
+   265→Task ID: 5
+   266→Agent: main (Z.ai Code)
+   267→Task: Integration, lint, agent-browser E2E verification & fixes
+   268→
+   269→Work Log:
+   270→- bun run lint → zero errors across the whole project
+   271→- dev.log clean: / 200, /api/presets 200, /api/settings 200, /api/rust-scaffold 200,
+   272→  no runtime errors, no hydration warnings
+   273→- Agent-browser E2E golden path, all VERIFIED:
+   274→  * initial load: idle overlay, 5 preset cards + .avs original links, tabs render
+   275→  * Demo Track → canvas lit (30.7% pixels @60fps, 480 pts), footer SRC/FPS/PTS/BPM live
+   276→  * footer shows detected 120.0 BPM from the demo kick pattern
+   277→  * Set Beat ×4 taps → "Locked: 99.8 BPM" (matches real ~600ms tap intervals), confidence 65%
+   278→  * Beat tab: AUDIO badge, beat count, sensitivity ×1.40, min interval 250ms, prediction switch
+   279→  * Stop audio → badge switches to PRED, beat count 20→35 (predictor keeps the beat),
+   280→    confidence decays 65%→35% — core requirement verified
+   281→  * Script editor: broken script → "✘ [point] line 8: Unknown function 'badfunc'";
+   282→    fixed script → "✔ Compiled OK — mode: lines, n=300"
+   283→  * Help panel: variables table, functions, operators, examples
+   284→  * Save as preset → "Smoke Test Ring" listed + toast; two-step delete verified
+   285→  * Save as Default → PUT /api/settings verified via curl; reload auto-loads the default
+   286→  * Detect tab: Bass 20–100 Hz / Mid 700–2000 Hz / High 7k–16 kHz cards, gains, live
+   287→    meters reading real audio (0.78/0.60/0.32)
+   288→  * Native tab: blueprint sections render + zip download (116 KB, 25 files, valid zip)
+   289→  * Mobile 390×844: responsive, footer pushed naturally, sticks to viewport bottom when scrolled
+   290→- Cleanup: deleted the test preset, cleared test defaultScript (DB + localStorage) so a
+   291→  fresh visit loads "Gap The Mind"
+   292→
+   293→Stage Summary:
+   294→- ALL acceptance criteria verified in-browser. Zero console errors. The application is
+   295→  fully interactive: 3-band detection, beat detection + prediction + tap learning, AVS-style
+   296→  scripting with editor/help/save/load, 5 authentic presets (adapted), Rust scaffold export.
+   297→
+   298→---
+   299→Task ID: 6
+   300→Agent: general-purpose
+   301→Task: "Stream a link" backend — yt-dlp link resolution + same-origin audio byte proxy (POST /api/resolve, GET /api/audio/stream)
+   302→
+   303→Work Log:
+   304→- Read worklog (Tasks 1–5) and existing routes; confirmed dev server already running on :3000
+   305→  (Node, next-server v16.1.3) — never restarted it; no build, no new deps, no git
+   306→- Installed yt-dlp standalone binary: bin/yt-dlp (GitHub latest yt-dlp_linux), chmod +x,
+   307→  --version prints 2026.10.21
+   308→- src/lib/server/ssrf.ts — assertPublicHttpUrl(raw): http(s) only, explicit port must be 80/443,
+   309→  localhost/.localhost/.local/.internal banned, IPv4 privates (0/8, 10/8, 100.64/10, 127/8,
+   310→  169.254/16, 172.16/12, 192.168/16), IPv6 ::/::1/fc00::/7/fe80::/10 plus IPv4-mapped
+   311→  ::ffff:a.b.c.d (embedded v4 checked; hand-written IPv6 expander handles v4 tails + zone ids),
+   312→  then dns.promises.lookup(all:true) with EVERY result re-checked by the same rules (kills
+   313→  nip.io / DNS-rebind tricks). Throws user-safe messages; returns the parsed URL.
+   314→- src/lib/server/stream-store.ts — Map on globalThis.__avaStreams via a typed interface with an
+   315→  optional property + `??=` (no `any`): token = randomBytes(16).hex (32 chars), entries
+   316→  { remoteUrl, title, source, expires }, 30-min sliding TTL, prune-on-every-access; exports
+   317→  createStreamEntry / getStreamEntry / refreshStreamEntry.
+   318→- src/app/api/resolve/route.ts — JSON body { url } (≤2048, trim) → 400s; SSRF gate → 400;
+   319→  10-min success cache on globalThis.__avaResolveCache (repeat links replay instantly);
+   320→  direct-audio bypass for .mp3 .m4a .aac .ogg .oga .opus .wav .flac .mp4 .webm (source "direct",
+   321→  title = decoded last path segment, fallback hostname); otherwise yt-dlp
+   322→  -J --no-warnings --no-playlist --no-progress --socket-timeout 15
+   323→  -f "bestaudio[protocol^=http]/bestaudio/best" with a 30 s kill → 504; non-zero exit →
+   324→  ANSI/control-stripped stderr tail (300 chars) → 422 ("Unsupported URL" gets its own message);
+   325→  stream URL pick = data.url ?? requested_formats[0].url ?? last http-protocol format;
+   326→  .m3u8/.mpd path or m3u8/mpd/dash protocol → 422 adaptive message; SSRF re-check on the
+   327→  RESOLVED stream URL (public CDNs like googlevideo pass) → 422 if not; title control-stripped +
+   328→  clamped 140 (fallback "Stream"), source = extractor_key|extractor|hostname lowercase,
+   329→  durationSec = numeric duration or null.
+   330→- src/app/api/audio/stream/route.ts — token → entry (prune first) else 404; SSRF re-check of the
+   331→  stored remoteUrl; forwards the client Range header, Chrome UA, redirect follow, no-store;
+   332→  !ok → 502 `Upstream failed (HTTP n).`; content-type must be audio/*, video/*,
+   333→  application/octet-stream or application/ogg else 502 "Upstream did not return audio.";
+   334→  refreshes sliding TTL, then passes through the upstream status with content-type/-length/
+   335→  -range/accept-ranges (only when upstream provided them) + Cache-Control: public, max-age=1800.
+   336→- FIX found while testing: the upstream host intermittently RST/ETIMEDOUTs full (non-ranged)
+   337→  fetches — verified against raw node fetch (1/6 ETIMEDOUT) — added ONE immediate retry on
+   338→  network-level failure only (HTTP error statuses are never retried); after that: 2× full GET
+   339→  200 audio/mpeg 8,945,229 bytes.
+   340→- tsc --noEmit: zero errors in the new files (the project's 8 pre-existing errors are all in
+   341→  src/lib/ava, examples/, skills/, rust-scaffold — untouched).
+   342→
+   343→Stage Summary:
+   344→- yt-dlp: /home/z/my-project/bin/yt-dlp, version 2026.10.21 (runtime order: $AVA_YTDLP →
+   345→  <cwd>/bin/yt-dlp if existsSync → "yt-dlp" on PATH)
+   346→- Files created (nothing else touched, no frontend files): bin/yt-dlp, src/lib/server/ssrf.ts,
+   347→  src/lib/server/stream-store.ts, src/app/api/resolve/route.ts, src/app/api/audio/stream/route.ts
+   348→- Test 1 MUST-PASS direct MP3 (soundhelix Song-1): resolve → ok:true, source:"direct",
+   349→  title:"SoundHelix-Song-1.mp3"; full stream GET → 200 audio/mpeg 8,945,229 B (>1 MB; takes ~30 s
+   350→  because the origin throttles at ~300 KB/s — proxy adds ~0); Range 0-1023 → 206 with
+   351→  content-range "bytes 0-1023/8945229", accept-ranges, cache-control all verified
+   352→- Test 2 MUST-PASS SSRF: http://127.0.0.1/x → 400, http://169.254.169.254/latest/meta-data → 400,
+   353→  ftp://example.com/a.mp3 → 400. Extras: localhost:8080 → 400 (port), foo.bar.local → 400,
+   354→  [::1] → 400, [::ffff:10.0.0.5] → 400 (v4-mapped), 127.0.0.1.nip.io → 400 (DNS-result check),
+   355→  "not a url" / {} / {"url":5} / bad JSON → 400 "Expected { url } JSON body."
+   356→- Test 3 YouTube jNQXAC9IVRw: bot-blocked from this datacenter IP ("Sign in to confirm you're not
+   357→  a bot"). Tried the 2 extractor-args variants (youtube:player_client=web_embedded, then =tv)
+   358→  within the 5-minute budget — still blocked. Surfaces as a clean 422 with the sanitized tail:
+   359→  "Could not extract audio from that link: …Sign in to confirm you're not a bot…". Honest
+   360→  outcome: blocked here, ACCEPTABLE per spec (would work from residential IPs / with cookies).
+   361→- Test 4 SoundCloud forss/flickermood: yt-dlp extracts fine (title "Flickermood", 213.9 s) but
+   362→  this serve only exposes m3u8_native formats (hls_aac_96k/160k — confirmed in raw -J JSON) →
+   363→  clean 422 adaptive(HLS/DASH) message, exactly the manifest-only contract case.
+   364→- Test 5 https://example.com/ → clean 422 "That site is not supported — try YouTube, SoundCloud,
+   365→  or a direct MP3 link."; example.com/stream.m3u8 → 422 (does NOT hit the direct bypass).
+   366→- Extractor SUCCESS path proven end-to-end with archive.org: resolve → ok:true,
+   367→  title:"mp3 test file", source:"archiveorg", durationSec:12.42; stream → 200 audio/mpeg
+   368→  198,658 B + 206 ranged; cache replay 16 ms.
+   369→- Stream negatives: unknown/missing token → 404 "Unknown or expired stream token"; upstream 500
+   370→  (missing file) → 502 "Upstream failed (HTTP 500)."
+   371→- lint: my 4 files pass eslint clean; `bun run lint` overall reports exactly 1 remaining error in
+   372→  src/components/ava/link-dialog.tsx:72 (set-state-in-effect) — that file is owned by the parallel
+   373→  frontend agent and was NOT touched by me per the ownership rules.
+   374→- dev.log: no exceptions/stack traces from the new routes — only expected
+   375→  200/206/400/404/422/502 request lines.
+   376→- Deviations from spec (all deliberate): (1) one network-error retry in the proxy (upstream RSTs,
+   377→  never retries HTTP statuses); (2) third store helper refreshStreamEntry() — the two required
+   378→  helpers plus this one implements the specified "refresh sliding expiry AFTER upstream success";
+   379→  (3) proxy fetch uses cache:'no-store'; (4) 500 wording "Audio extractor unavailable (yt-dlp not
+   380→  found or failed to start)."; (5) success cache keyed by the normalized URL href (target.href).
+   381→
+   382→---
+   383→Task ID: 7
+   384→Agent: main (Z.ai Code)
+   385→Task: Frontend integration of the "Link" audio source (YouTube / SoundCloud / direct MP3)
+   386→
+   387→Work Log:
+   388→- Read worklog + all relevant files (audio.ts, store.ts, audio-source.ts, header.tsx,
+   389→  visual-stage.tsx, footer-bar.tsx, types.ts) before editing.
+   390→- src/lib/ava/types.ts — AudioSourceKind += 'link'
+   391→- src/lib/ava/audio.ts — new startUrl(streamUrl, title): same-origin proxied <audio> element →
+   392→  MediaElementAudioSourceNode → analyser (NOT cross-origin-tainted, so FFT works) → speakers;
+   393→  loops by default; public sourceLabel field (file name / stream title) maintained by all
+   394→  start* methods + stopSources
+   395→- src/lib/store.ts — AudioSourceState += 'link'; new sourceTitle + linkDialogOpen state
+   396→- src/components/ava/audio-source.ts — new resolveAndPlayLink(url): POST /api/resolve →
+   397→  engine.audio.startUrl → store sync; never throws (returns {ok,title,source,error}); on
+   398→  playback failure stops the engine and resets store; syncSource now also syncs sourceTitle
+   399→- src/components/ava/link-dialog.tsx — NEW: dialog with URL input + Load button (spinner),
+   400→  inline error box with YouTube bot-wall hint, RECENT LINKS chips (localStorage, max 5,
+   401→  one-click reload); body REMOUNTS on every open (fresh state — no setState-in-effect, fixes
+   402→  the lint error the Task 6 agent saw mid-build); results arriving after the user closed the
+   403→  dialog surface as toasts
+   404→- src/components/ava/header.tsx — "Link" segment button between File and Stop (opens dialog);
+   405→  <LinkDialog /> mounted in the header
+   406→- src/components/ava/visual-stage.tsx — idle overlay gains a 4th button "Stream a Link" +
+   407→  updated copy
+   408→- src/components/ava/footer-bar.tsx — SRC now shows "LINK · <title>" (truncated) for the
+   409→  active source; title also shown for File sources
+   410→- src/app/api/resolve/route.ts (main-agent touch-up, coordinated with Task 6's file): added
+   411→  BOT_WALL_RE mapping so YouTube's "Sign in to confirm you're not a bot" stderr returns a
+   412→  clean actionable 422 instead of a raw yt-dlp tail; client hint suppressed when the server
+   413→  message already explains the fix (no duplication)
+   414→
+   415→Stage Summary:
+   416→- Full link-source flow wired: header/idle-overlay → dialog → resolve → proxied playback →
+   417→  band analysis + beat detection + visuals, all client-side after resolution. Zero layout
+   418→  changes beyond the additive bits; lint clean.
+   419→
+   420→---
+   421→Task ID: 8
+   422→Agent: main (Z.ai Code)
+   423→Task: E2E verification (agent-browser) of the link source + regression checks
+   424→
+   425→Work Log:
+   426→- bun run lint → zero errors; dev.log clean (no exceptions)
+   427→- Initial load: header shows Demo/Mic/File/LINK/Stop; idle overlay has 4 buttons incl.
+   428→  "Stream a Link"; presets/tabs intact
+   429→- Link dialog: opens from idle overlay AND header; invalid input ("not a url") → inline
+   430→  client-side error "Paste a full http(s) link…"
+   431→- Direct MP3 (SoundHelix Song 1): resolve → dialog closes → toast → footer shows
+   432→  "SRC: LINK · SoundHelix-Song-1.mp3, FPS: 60, PTS: 480, BPM: 131.2" (real tempo ≈131 —
+   433→  beat detection locks from the STREAMED audio, proving the same-origin proxy keeps the
+   434→  analyser untainted); canvas luminance/bright-pixel counts change frame-to-frame (live
+   435→  animation); screenshot ava-link-playing.png
+   436→- Failed YouTube attempt while SoundHelix playing: music KEEPS playing (failed resolve
+   437→  never touches the engine) — verified footer still LINK @60fps after closing dialog
+   438→- RECENT LINKS: chip "DIRECT · SoundHelix-Song-1.mp3" appears on re-open; one-click reload
+   439→- YouTube jNQXAC9IVRw from this datacenter IP: clean 422 bot-wall message + actionable hint
+   440→  (verified twice — before/after the BOT_WALL_RE improvement)
+   441→- Beat predictor regression check: tap-tempo path (6×500 ms taps on the real Set Beat
+   442→  button) → "120.0 BPM, 98% confidence" → Stop → beat count 54→63 over 4.5 s, PRED badge,
+   443→  confidence decays 98→80% — "keeps the beat when the bass drops out" confirmed. (Note:
+   444→  auto-detect confidence on the 124 BPM demo stays low with the leftover test beatConfig
+   445→  ×1.35/210 ms — interval spread from the demo bassline; the designed learning path
+   446→  (Set Beat) locks instantly.)
+   447→- Console: zero errors (only HMR messages)
+   448→- Mobile 390×844: no horizontal scroll; footer pushed naturally by content and STICKS to
+   449→  viewport bottom when scrolled to end; VLM inspection of desktop + mobile screenshots
+   450→  confirms clean layout, no breakage
+   451→
+   452→Stage Summary:
+   453→- Link source fully verified in-browser: resolve → stream → analyze → visualize at 60 fps,
+   454→  beat detection on streamed audio, graceful YouTube bot-wall, recent-links, predictor
+   455→  regression pass. The only environmental limitation: YouTube blocks this datacenter IP
+   456→  (honest 422; works from residential IPs or with server-side cookies). SoundCloud/Bandcamp/
+   457→  archive.org/direct files all resolve; SoundCloud serves HLS-only for some tracks → clean
+   458→  adaptive-stream error.
+   459→
+   460→---
+   461→Task ID: 9
+   462→Agent: main (Z.ai Code)
+   463→Task: Preset library folder-tree data layer (backend + store) for the requested
+   464→"folder/file tree" Presets page redesign
+   465→
+   466→Work Log:
+   467→- Prisma schema: Preset += folderPath (default "root/user created") + originalFile,
+   468→  @@unique([folderPath, name]); new Folder model (path @unique). db:push OK,
+   469→  client regenerated, dev server restarted once to pick up the new client.
+   470→- src/lib/server/preset-tree.ts — shared helpers: normalizeFolderPath (root-prefixed,
+   471→  max depth 8, 80-char segments, control chars rejected), isValidName, parentOf,
+   472→  subtreeFilter (presets) + subtreeFolderFilter (folders), ensureFolderRows
+   473→  (creates missing ancestors), PROTECTED_FOLDERS = root | root/embedded | root/user created.
+   474→- GET /api/presets — one-time seed: folder backbone (root, root/embedded,
+   475→  root/user created, root/embedded/{Synth-C,Amp Picks,Dynamics,Envision}) +
+   476→  95 presets (5 hand-ported classics → Synth-C; 90 auto-converted Google-Drive
+   477→  presets → Amp Picks 66 / Dynamics 9 / Envision 15, doubling prefix normalized).
+   478→  Legacy pre-folder built-ins migrated automatically. Response now
+   479→  { presets, folders } with folderPath + originalFile on each preset.
+   480→- POST /api/presets — create in folder (409 on name clash within folder).
+   481→- PUT /api/presets/[id] — update content/author/description or RENAME (unique
+   482→  per folder enforced); built-in restriction REMOVED (tree is fully manageable).
+   483→- DELETE /api/presets/[id] — any preset deletable.
+   484→- /api/folders — POST create subfolder (parent must exist), PATCH rename folder
+   485→  + all descendants (transaction, prefix rewrite), DELETE ?path= removes subtree
+   486→  (folders + presets). Protected folders reject rename/delete with 400.
+   487→- /api/presets/export?path=… — jszip download preserving the directory structure
+   488→  from root ("root/user created/Club Set/Test Ring.ava" style entries + dir entries).
+   489→- /api/presets/import (multipart file + targetPath) — imports .ava/.txt entries;
+   490→  "root/…"-prefixed paths land at their exact path, others under the target
+   491→  folder; creates missing folder rows; skips name-clash duplicates; reports
+   492→  { imported, skipped, skippedOther, foldersCreated }.
+   493→- src/lib/store.ts — PresetItem += folderPath/originalFile; EditTarget; new state:
+   494→  folders, selectedFolder, selectedPresetId, expandedFolders (depth<=2 default
+   495→  open), editTarget, activePresetId, randomize/randomIntervalSec/randomScope;
+   496→  actions selectFolder (also sets randomize scope live), selectPreset, setEditTarget,
+   497→  setActivePresetId, setRandomize, setRandomIntervalSec (3–60 s validation);
+   498→  module-level club-mode timer (syncRandomTimer/stopRandomTimer, loadRandomPreset
+   499→  applies to the ENGINE ONLY — never clobbers unsaved editor text; up to 4 random
+   500→  retries for compilable scripts; toast per switch); settings persisted to
+   501→  localStorage "ava.randomize" and restored via restoreRandomSettings(folders);
+   502→  refreshPresets now fetches presets+folders and prunes stale selections.
+   503→- src/app/page.tsx — initial load sets folders, startup fallback prefers the
+   504→  first root/embedded/Synth-C preset, sets activePresetId, restores randomize.
+   505→- VERIFIED via curl: seed 95/7 folders correct; create folder/preset; 409 dup;
+   506→  rename folder moves preset paths; export zip listing shows full paths; delete
+   507→  subtree; import restores the exact tree; protected-folder rename/delete → 400;
+   508→  export root → 200. tsc clean on all touched files.
+   509→
+   510→Stage Summary:
+   511→- API contract for the new UI:
+   512→  GET /api/presets → { presets: PresetItem[], folders: string[] }
+   513→  POST /api/presets { name, content, author?, description?, folderPath? } → { preset } | 409 | 400
+   514→  PUT /api/presets/[id] { name?, content?, author?, description? } → { preset }
+   515→  DELETE /api/presets/[id] → { deleted }
+   516→  POST /api/folders { path } → { folder } | 409 | 400
+   517→  PATCH /api/folders { path, newName } → { renamed, to, folders, presets }
+   518→  DELETE /api/folders?path=… → { deleted, folders, presets } (protected → 400)
+   519→  GET /api/presets/export?path=… → zip download (structure preserved from root)
+   520→  POST /api/presets/import (file, targetPath) → { imported, skipped, skippedOther, foldersCreated }
+   521→- Store API for the UI (src/lib/store.ts): useAvaStore fields folders,
+   522→  selectedFolder, selectedPresetId, expandedFolders, editTarget, activePresetId,
+   523→  randomize, randomIntervalSec, randomScope + actions listed above; helpers
+   524→  refreshPresets(), stopRandomTimer(), syncRandomTimer(), restoreRandomSettings().
+   525→- Random presets are applied engine-only (editor untouched) by design.
+   526→
+   527→---
+   528→Task ID: 10
+   529→Agent: full-stack-developer (Presets UI)
+   530→Task: Presets tab redesign — folder/file tree manager + Script tab Save-to-target / Save As
+   531→
+   532→Work Log:
+   533→- Read worklog (Task 9 contract), store.ts, all 5 API routes, old presets-tab,
+   534→  script-tab, shared.ts, control-panel.tsx, page.tsx, audio-source.ts,
+   535→  presets.ts, detect/beat tabs for style matching.
+   536→- src/components/ava/presets-tab.tsx — COMPLETE REWRITE (~1000 lines):
+   537→  - buildTree(folders, presets): synthesizes missing Folder rows + ancestors
+   538→    from preset folderPaths (defensive); segment-wise alphabetical sort
+   539→    (parents before children), presets sorted within folders; subtree preset
+   540→    counts per node.
+   541→  - TreeFolder/TreePreset recursive rows: chevron-only expand/collapse
+   542→    (store.toggleFolder; default open = path depth <= 2 segments, same rule
+   543→    as the store), row click selects (selectFolder/selectPreset), preset
+   544→    double-click loads, running preset = emerald Play icon + emerald-300 text
+   545→    + bg-emerald-400/10, selected rows = emerald left border + bg-zinc-800/70,
+   546→    subtree count badge (font-mono, tooltip "presets in this folder and
+   547→    below"), originalFile rows get a hover-visible (always on mobile) .avs
+   548→    download anchor, empty folders show "(empty)" italic hint. role=tree/
+   549→    treeitem/group, aria-expanded/selected/level, 36px (size-9/h-9) targets.
+   550→    Tree scrolls in max-h-[420px] lg:max-h-[480px] with thinScrollbar.
+   551→  - Two-column layout: tree 58% / actions 42% on sm+, stacked on mobile.
+   552→  - Context-sensitive actions panel (header shows selection + counts):
+   553→    preset -> LOAD PRESET (emerald; applyScriptText -> toast -> setActivePresetId
+   554→    + setEditTarget, compile error -> destructive toast + script tab), RENAME,
+   555→    DELETE; folder -> CREATE PRESET (POST starter template -> refresh ->
+   556→    editTarget + editor + engine + select + tab switch + toast), NEW SUBFOLDER
+   557→    (POST -> expand parent + select new), RENAME (PATCH folder / PUT preset,
+   558→    selection + editTarget follow the rename), DELETE (AlertDialog with
+   559→    client-side blast radius "removes N presets in M folders", protected
+   560→    folders root | root/embedded | root/user created have Rename+Delete
+   561→    disabled with "Protected folder" tooltip), EXPORT .ZIP (asChild anchor ->
+   562→    /api/presets/export?path=..., download attr), IMPORT .ZIP (hidden .zip
+   563→    input -> FormData POST -> summary toast with duplicates/foldersCreated).
+   564→    All server errors (409/400/404/500) surface as destructive toasts with
+   565→    the server message; empty names get inline dialog validation.
+   566→  - Randomize section (border-t): Checkbox + 3-60s delay input; invalid input
+   567→    shows red hint and reverts to the committed store value on blur (valid
+   568→    values commit live via setRandomIntervalSec); scope line reflects
+   569→    randomScope (folder name or "all presets"), amber "no presets in this
+   570→    folder yet" hint when scope empty; pulsing emerald "ON · every Ns" badge
+   571→    while running. Timer itself runs in the store — UI only wires controls.
+   572→  - NameDialog made fully controlled (parent owns value/error) to satisfy
+   573→    react-hooks/set-state-in-effect lint rule.
+   574→- src/components/ava/script-tab.tsx — EDITS:
+   575→  - "Saving to: root/…/Name" chip (emerald, middle-truncated path, full path
+   576→    in tooltip) with X button clearing the edit target; shown only while
+   577→    editTarget is set.
+   578→  - Save button (emerald, only with editTarget): PUT /api/presets/[id]
+   579→    {content, author from validateScript meta} -> refreshPresets + toast
+   580→    'Saved to "Name"'; disabled while saving.
+   581→  - Save As… button (only with editTarget): Dialog prefilled with the current
+   582→    name -> POST /api/presets same folder -> setEditTarget(new) + refresh +
+   583→    toast; 409 handled; empty name inline error.
+   584→  - New button now also clears the edit target.
+   585→- VERIFIED in headless browser (agent-browser): tree render/expansion/
+   586→  selection, Load (toast + tab wiring), Save (PUT 200), Save As (copy
+   587→  created server-side + chip retargeted), delete preset + folder dialogs
+   588→  (blast-radius + empty-folder wording), create preset (full flow incl.
+   589→  editor + tab switch), new subfolder, rename folder (selection follows,
+   590→  editTarget path rewritten), import .zip end-to-end (DataTransfer dispatch
+   591→  into the hidden input -> 96 presets/8 folders -> toast -> cleanup),
+   592→  randomize persistence + scope line + invalid-delay revert + ON badge.
+   593→  Library restored to pristine 95 presets / 7 folders after testing.
+   594→- bun run lint: clean. tsc: clean on both touched files (pre-existing errors
+   595→  elsewhere in examples/, skills/, audio.ts, script.ts untouched).
+   596→  dev.log: no runtime errors.
+   597→
+   598→Stage Summary:
+   599→- Files modified: src/components/ava/presets-tab.tsx (full rewrite),
+   600→  src/components/ava/script-tab.tsx (chip + Save/Save As/New edits).
+   601→  No changes to page.tsx, store.ts, API routes, or other tabs.
+   602→- Key decisions: subtree (not direct) preset counts on folder badges
+   603→  (labeled via tooltip); NameDialog fully controlled to pass the new
+   604→  react-hooks lint rules; rename keeps editTarget/randomScope/selection
+   605→  pointing at the renamed paths client-side (refreshPresets prunes stale
+   606→  ones server-side); delay input commits valid values live but only reverts
+   607→  invalid text on blur so typing isn't fighted; export/import allowed on
+   608→  protected folders (rename/delete disabled) exactly per spec.
+   609→- Store/API notes for Task 11: none needed — the Task 9 contract covered
+   610→  everything. One cosmetic gap: setRandomIntervalSec is typed (sec: number)
+   611→  though the store handles numeric strings at runtime; UI converts with
+   612→  Number() before calling.
+   613→- Left for Task 11 verification: visual polish pass in a real browser
+   614→  (spacing at 420 vs 440px panel widths, mobile stacking), touch-device
+   615→  check of the hover-only .avs download button, and double-click-to-run
+   616→  ergonomics (agent-browser cannot dblclick, so that path was verified via
+   617→  the identical Load Preset code path).
+   618→
+   619→---
+   620→Task ID: 11
+   621→Agent: main (Z.ai Code)
+   622→Task: E2E verification of the new folder-tree Presets page + final cleanup
+   623→
+   624→Work Log:
+   625→- bun run lint: zero errors. tsc clean on all files touched by Tasks 9–10.
+   626→  dev.log: no runtime errors, no hydration warnings.
+   627→- Agent-browser E2E golden path, ALL VERIFIED:
+   628→  * Tree renders exactly as requested: root/ → embedded/ (Synth-C 5, Amp Picks 66,
+   629→    Dynamics 9, Envision 15) + user created/ 0; subtree count badges; depth≤2
+   630→    folders default-expanded; chevron-only expand/collapse; role=tree/treeitem.
+   631→  * Preset select → action panel switches to preset context (Load/Rename/Delete);
+   632→    folder select → full management set; protected folders (root/embedded/user
+   633→    created) have Rename+Delete disabled.
+   634→  * Load Preset: applied, toast, emerald Play-icon running indicator in tree,
+   635→    footer SCRIPT updated, engine running.
+   636→  * Create Preset: dialog → created in selected folder → auto-switch to Script
+   637→    tab with starter template → "Saving to: root/user created/…/Name" chip →
+   638→    edit → Save (PUT) persisted server-side (verified content round-trip) →
+   639→    Save As… created "Club Ring v2" in the same folder and retargeted the chip.
+   640→  * New Subfolder → "My Fav Presets" created + selected + toast.
+   641→  * Rename folder "My Fav Presets" → "Club Night": both presets' paths updated.
+   642→  * Delete folder: AlertDialog with blast radius ("removes 2 presets"), confirmed
+   643→    → folder + presets gone, library back to 95.
+   644→  * Export .zip: link href /api/presets/export?path=… correct; zip contains
+   645→    "root/user created/Round Trip/RT Preset.ava" (structure preserved from root).
+   646→  * Import .zip via the UI file input (DataTransfer dispatch): toast
+   647→    "Imported 1 presets — 1 folders created", tree restored at the exact path.
+   648→  * Randomize: invalid delay 2 and 61 both rejected with the "3 and 60 seconds"
+   649→    error + revert; 4 accepted; checkbox on → "ON · every 4s" badge; with Demo
+   650→    audio running, the timer switched to a random preset from the selected
+   651→    scope after ~4s (toast + footer PTS 333 matching the loaded script);
+   652→    scope line follows folder selection; settings persist to localStorage and
+   653→    do NOT auto-restart after reload unless enabled.
+   654→  * Mobile 390×844: no horizontal scroll, tree/actions stack, footer pushed
+   655→    naturally and sticks to viewport bottom when scrolled to the end.
+   656→  * Fresh reload: startup falls back to the first root/embedded/Synth-C preset
+   657→    (Gap The Mind), tree repopulates, zero console errors.
+   658→- Cleanup: deleted the Round Trip / Club Ring test data (library back to the
+   659→  pristine 95 presets / 7 folders); test artifacts in tool-results/.
+   660→
+   661→Stage Summary:
+   662→- The requested Presets page redesign is COMPLETE and browser-verified:
+   663→  left folder/file tree (root → embedded {Synth-C, Amp Picks, Dynamics,
+   664→  Envision} + user created) with counts, expansion, selection, running
+   665→  indicator and .avs original downloads; right management panel (Load Preset,
+   666→  Create Preset → Script tab → Save/Save As, New Subfolder, Rename, Delete with
+   667→  confirmation + blast radius, Export .zip preserving the tree, Import .zip
+   668→  restoring the tree) and Randomize (3–60 s validated) scoped to the selected
+   669→  folder. All flows verified end-to-end with zero console errors.
+   670→
+   671→---
+   672→Task ID: 12
+   673→Agent: main (Z.ai Code)
+   674→Task: LOST-WORK RECOVERY — restore the folder-tree Presets page (Tasks 9–11)
+   675→from the user's Google Drive project download after the sandbox was rebuilt
+   676→from an earlier snapshot
+   677→
+   678→Context:
+   679→- The sandbox running Tasks 9–11 was replaced by a rebuilt environment whose
+   680→  git history ended at the "link source" commit (51e07079 → local 4caaa3e).
+   681→  The two commits containing the Google-Drive preset import (b33474e) and the
+   682→  folder-tree implementation (2a23db4) existed only in the user's downloaded
+   683→  copy of the project — which the user kindly re-hosted on Google Drive.
+   684→
+   685→Work Log:
+   686→- Downloaded the user's archive (drive file 1yUmimOpLyz7l8BQO6keUHPCvLaV6TW5k,
+   687→  86 MB tar.gz, includes .git with the two lost commits) to /tmp/ava-restore.
+   688→- Verified the archive's base commit (fb12d97, subject 51e07079) is
+   689→  content-identical to the workspace HEAD 4caaa3e (git diff empty except
+   690→  .zscripts/tool-results) → archive HEAD is a strict superset, safe to restore.
+   691→- Stopped the dev server, then surgically checked out all 200 files changed
+   692→  between fb12d97 → 2a23db4 (excluding .zscripts/dev.pid, tool-results,
+   693→  dev.log): prisma/schema.prisma (Folder model + Preset.folderPath/originalFile),
+   694→  db/custom.db (pre-seeded 95 presets / 7 folders), src/lib/server/preset-tree.ts,
+   695→  src/lib/ava/embedded-presets.ts, src/lib/ava/{engine,expression,script}.ts
+   696→  (functions needed by the converted presets), src/app/api/{folders,presets/**
+   697→  export,import}/route.ts, presets-tab.tsx (full tree rewrite), script-tab.tsx
+   698→  (Save/Save As chip), store.ts (tree + randomize state), page.tsx, plus the
+   699→  95 .avs originals under public/avs-originals/… and tools/convert-avs.ts.
+   700→- Ran `bun run db:generate` to rebuild the Prisma client for the new schema
+   701→  (the restored db already matched it — no db:push needed, no data loss).
+   702→- Restarted the dev server (port 3000, single instance).
+   703→- VERIFIED via API: GET /api/presets → 95 presets / 7 folders
+   704→  (Synth-C 5, Amp Picks 66, Dynamics 9, Envision 15); export
+   705→  root/embedded/Synth-C → zip with full "root/embedded/Synth-C/*.ava" paths;
+   706→  import of the same zip → 0 imported / 5 skipped (duplicate paths) — round
+   707→  trip intact.
+   708→- VERIFIED in agent-browser (desktop 1440×900 + mobile 390×844): tree renders
+   709→  (root 95 → embedded {Amp Picks 66, Dynamics 9, Envision 15, Synth-C 5} +
+   710→  user created), preset select → Load Preset → engine running (footer
+   711→  "SRC: DEMO, FPS: 60, PTS: 480, BPM: 126.8, SCRIPT: Gap The Mind, engine ok"),
+   712→  New Subfolder ("My Fav Presets" created + selected), Rename (→ "Club Night",
+   713→  toast shows new path), Delete (alertdialog + server 200, tree cleaned),
+   714→  Randomize delay validation ("2" → red "Delay must be between 3 and 60
+   715→  seconds." hint; "4" commits), .avs original HEAD → 200, reload → startup
+   716→  fallback loads Gap The Mind, zero console/page errors, mobile: no horizontal
+   717→  scroll, footer pushed naturally and flush with the viewport bottom when
+   718→  scrolled to end. bun run lint: clean.
+   719→- Test data cleaned up (Club Night folder deleted; library back to 95/7).
+   720→- Committed the restoration to git and left the recovery remote/objects
+   721→  out of the repo (temp files remain in /tmp/ava-restore only).
+   722→
+   723→Stage Summary:
+   724→- The folder-tree Presets page (Tasks 9–11) is fully restored and re-verified
+   725→  end-to-end. Root cause of the "revert": the environment was rebuilt from a
+   726→  snapshot predating the morning's commits; the work itself was never lost in
+   727→  the user's download. All state (schema, data, API, UI, presets, tooling)
+   728→  now matches the archive's HEAD (2a23db4) on top of the current workspace.
+   729→- NOTE for the future: commit snapshots are the source of truth when an
+   730→  environment rebuild is suspected — compare git log before re-implementing.
+   731→
+   732→---
+   733→Task ID: 13
+   734→Agent: main (Z.ai Code)
+   735→Task: v6.0 — rename to "Open Visualization Engine" (AVA → OVE) + footer
+   736→version indicator (establishes the versioning convention)
+   737→
+   738→Work Log:
+   739→- New src/lib/version.ts — single source of truth: APP_NAME
+   740→  "Open Visualization Engine", APP_SHORT "OVE", APP_VERSION "6.0" + a
+   741→  short version-history comment (6.0 rename+stamp, 5.0 folder-tree, 4.0
+   742→  link source) so future bumps are a one-line change.
+   743→- src/app/layout.tsx — document title now "OVE — Open Visualization Engine
+   744→  (v6.0)" (built from the constants); description + keywords updated
+   745→  (AVA→OVE, "agent"→"engine").
+   746→- src/components/ava/header.tsx — logo block h1 "AVA" → "OVE" (APP_SHORT),
+   747→  subtitle "ADVANCED VISUALIZATION AGENT" → "OPEN VISUALIZATION ENGINE"
+   748→  (APP_NAME.toUpperCase()), both imported from version.ts.
+   749→- src/components/ava/footer-bar.tsx — right cluster is now a ml-auto wrapper
+   750→  holding: "version 6.0" stamp (text-zinc-600, tooltip "Open Visualization
+   751→  Engine — version 6.0") immediately LEFT of the engine-ok dot + label,
+   752→  exactly as requested. Stamp is visible on mobile too (fits: no horizontal
+   753→  scroll at 390px).
+   754→- Internal code identifiers (ava store/lib/component paths, ava-agent rust
+   755→  crate) intentionally left unchanged — the rename is user-facing only.
+   756→- VERIFIED in agent-browser: title "OVE — Open Visualization Engine (v6.0)";
+   757→  header logo/subtitle; footer text "...version 6.0\nengine ok" with the
+   758→  stamp on the same row, right of the stats, left of the dot; mobile 390×844
+   759→  no horizontal scroll + stamp visible; zero console/page errors; lint clean.
+   760→- Committed as "v6.0 — rename to Open Visualization Engine + version stamp".
+   761→
+   762→Stage Summary:
+   763→- Versioning convention established: bump APP_VERSION in src/lib/version.ts
+   764→  on every large change; the stamp renders bottom-right of the footer and the
+   765→  document title carries it too. Users can name local backups by the stamp
+   766→  (e.g. "OVE v6.0") and cross-check against z.ai Version History.
+   767→
+   768→---
+   769→Task ID: 14
+   770→Agent: main (Z.ai Code)
+   771→Task: v6.1 — preset library quality pass: every embedded stand-in is now a
+   772→UNIQUE visual (user reported "Containment" and "Dragonscales" look identical)
+   773→
+   774→Root cause:
+   775→- The old converter had only 6 fixed fallback templates chosen by
+   776→  seed % 6, so 76 of 90 embedded presets collapsed into 6 identical visuals
+   777→  (19×swirl, 16×pulse-rings, 14×starfield, 12×lattice, 10×kaleido, 5×tunnel);
+   778→  library-wide only 25 of 95 distinct script bodies.
+   779→
+   780→Work Log:
+   781→- tools/convert-avs.ts — REPLACED the fallback generator:
+   782→  * 16 geometric families (pulse rings, tunnel, starfield, lattice, swirl,
+   783→    kaleido, lissajous, spectrum bars, moire, fountain, rose, orbits, ribbon,
+   784→    web, rain, helix), each parameterized.
+   785→  * 6 palettes (rainbow / fire / ice / neon-band / mono / duotone).
+   786→  * Every numeric parameter drawn from mulberry32 seeded by hashStr(preset
+   787→    name) — same name regenerates the same visual forever; different names
+   788→    always differ (counts, speeds, twists, couplings, widths, persistence).
+   789→  * Family chosen from the original's unportable components (BlitterFeedback
+   790→    → tunnel/kaleido/moire, Movement → swirl/ribbon/web, Mirror → kaleido,
+   791→    DotFountain → fountain, …) + guaranteed full 16-family rotation per run
+   792→    (unused-families first) + 25% wild card.
+   793→  * Every generated fallback is smoke-tested; a known-good safeFallback is
+   794→    the last resort (never emits a broken script).
+   795→  * Fixed during regen: getspec() needs 3 args (spectrum family); tiny-n
+   796→    guard (ported scopes rendering <16 points now also become stand-ins —
+   797→    5 more presets rescued); folder path no longer double-prefixed
+   798→    ("root/embedded/root/embedded/…" → clean at the source); same-path
+   799→    copyFileSync guard so the converter can re-run in place.
+   800→- Regenerated src/lib/ava/embedded-presets.ts from public/avs-originals/
+   801→  embedded/ (90 presets: 9 ported original-code + 81 unique stand-ins; all
+   802→  16 families used, max 9 presets per family, 90/90 distinct bodies).
+   803→- prisma/schema.prisma — Preset.approx Boolean (marks stand-ins), Settings.
+   804→  embeddedSeed String? (seed-version marker). db push + client regenerated;
+   805→  dev server restarted once to pick up the new client.
+   806→- GET /api/presets — ensureSeeded is now VERSION-GATED: when Settings.
+   807→  embeddedSeed !== EMBEDDED_SEED_VERSION ('6.1', exported from
+   808→  embedded-presets.ts), the root/embedded subtree + stray built-ins are
+   809→  deleted and re-seeded from BUILTIN + EMBEDDED (user presets untouched).
+   810→  Future library regenerations propagate automatically on next request.
+   811→  Response now includes approx per preset.
+   812→- src/lib/store.ts — PresetItem.approx?: boolean.
+   813→- src/components/ava/presets-tab.tsx — amber "≈" badge on tree rows for
+   814→  approx presets (tooltip explains: original relies on effects the script
+   815→  engine can't run; uniquely generated stand-in).
+   816→- src/lib/version.ts — APP_VERSION '6.1'.
+   817→- VERIFIED: API re-seed → 95 presets / 7 folders, 81 approx + 14 original
+   818→  code, 95/95 distinct bodies, Containment ≠ Dragonscales (different
+   819→  families + parameters); VLM image comparison of live screenshots confirms
+   820→  clearly different visuals (organic single loop vs woven orbital knot);
+   821→  Kingish (594 pts) renders; ≈ badges (60 of 66 Amp Picks rows); Randomize
+   822→  over root scope switches presets at 3 s (Kingish → Plankton); export zip
+   823→  66 entries with clean paths; zero console/page errors; lint clean.
+   824→
+   825→Stage Summary:
+   826→- Every embedded preset is now visually unique (95/95 distinct bodies).
+   827→- Honesty layer: approx stand-ins are badged "≈" in the tree; descriptions
+   828→  name the generated family; the original .avs download remains one click.
+   829→- Regeneration pipeline: bun tools/convert-avs.ts public/avs-originals/
+   830→  embedded → bump SEED_VERSION in the converter → DB refreshes itself via
+   831→  the embeddedSeed marker on the next GET /api/presets.
+   832→- 9 error files (parser "out of bytes") remain excluded — parser hardening
+   833→  is future work if those originals matter.
+   834→
+   835→---
+   836→Task ID: 15-11
+   837→Agent: general-purpose (E2E verifier)
+   838→Task: v6.2 security hardening — end-to-end browser + API verification
+   839→
+   840→Work Log:
+   841→- Read worklog Tasks 9–14 + v6.2 sources (presets-tab.tsx, script-tab.tsx,
+   842→  user-presets.ts, api routes) read-only to know exact button/toast wording.
+   843→- A. curl probes of every mutation endpoint (POST/PUT/DELETE presets,
+   844→  POST/DELETE folders, import, settings, GET presets shape).
+   845→- B. agent-browser desktop session at 1440×900: golden path exactly per
+   846→  checklist — embedded folder/preset panels, lock/User badges (DOM
+   847→  svg.lucide-lock / svg.lucide-user), Copy to my presets, dblclick load,
+   848→  user-folder management (Create Preset → Script tab → Save), rename,
+   849→  embedded Save block toast + Save As copy, subfolder + nested preset +
+   850→  blast-radius delete, preset delete, Survivor persistence across reload,
+   851→  full cleanup, client-side zip export toast, localStorage JSON check,
+   852→  Randomize delay validation (2 vs 5) + uncheck. Screenshots + VLM visual
+   853→  cross-checks in tool-results/e2e-v62/.
+   854→- C. Mobile 390×844: scrollWidth check, tree/panel stacking geometry,
+   855→  footer position (first paint vs scrolled-to-end), lock badges, panel
+   856→  interaction; VLM visual confirmation of 07-mobile-firstpaint.png.
+   857→- D. dev.log reviewed over the whole session window (baseline line 288 →
+   858→  end 396): only prisma:query + GET 200s; grepped for error/warn/exception.
+   859→- Final state: browser localStorage ove.userPresets.v1 =
+   860→  {"v":1,"folders":[],"presets":[]} (user created empty); server library
+   861→  pristine 95 presets / 7 folders, zero user-created rows.
+   862→
+   863→Results:
+   864→- A1..A4: PASS. A1 POST /api/presets → 403 "The server preset library is
+   865→  read-only. Your presets are saved in your browser under "user created"."
+   866→  A2 DELETE /api/folders?path=root/embedded → 403 (same class of message).
+   867→  A3 GET /api/settings → 404 (Next 404 page; title "OVE — … (v6.2)").
+   868→  A4 GET /api/presets → 200, exactly 95 presets, folders exactly
+   869→  [root, root/embedded, root/embedded/{Amp Picks, Dynamics, Envision,
+   870→  Synth-C}, root/user created], 0 presets under root/user created.
+   871→  Extra probes: PUT & DELETE /api/presets/[id] → 403; POST /api/folders →
+   872→  403; POST /api/presets/import → 403; PUT /api/folders → 405 (no handler —
+   873→  mutation still blocked); GET /api/presets/export → 200 (read-only legacy
+   874→  endpoint still present; UI export is client-side as built).
+   875→- B5..B21: ALL PASS.
+   876→  B5 title/header "OVE", footer "version 6.2 | engine ok", tree embedded(95)
+   877→  + subfolders with 🔒 lock icons on root/embedded/×4 subfolders (user
+   878→  created without), user created(0), 0 console errors.
+   879→  B6 embedded folder → read-only note, only Export .zip + Import .zip (no
+   880→  Create/Rename/Delete), READ-ONLY chip (VLM-confirmed).
+   881→  B7 embedded preset (Kingish) → Load Preset + Copy to my presets, no
+   882→  Rename/Delete, READ-ONLY chip.
+   883→  B8 toast "Copied to your presets | ""Kingish (copy)"" is now yours to
+   884→  edit — stored in this browser only."; copy appears under user created
+   885→  with User icon.
+   886→  B9 dblclick copy → "Preset loaded | ""Kingish (copy)"" is now running."
+   887→  B10 user created folder → Create Preset + New Subfolder enabled, Rename +
+   888→  Delete shown but disabled (protected root, tooltip explains).
+   889→  B11 Create "Test Preset E2E" → "Preset created", auto-switch to Script
+   890→  tab with "Saving to: root/user created/Test Preset E2E" chip.
+   891→  B12 Save → "Saved to ""Test Preset E2E"" …" + updatedAt>createdAt in
+   892→  localStorage (PASS on retry — see issue 1).
+   893→  B13 Rename → "Preset renamed | ""Test Preset E2E"" is now ""Test Renamed""."
+   894→  B14 embedded target Save → destructive "Embedded presets are read-only |
+   895→  Use ""Save As…"" — it stores your copy under ""user created"" …";
+   896→  Save As… (name kept) → "Copy saved | ""Plankton"" created in
+   897→  root/user created (this browser)." + chip retargeted.
+   898→  B15 E2E Folder created; "Nested One" created inside it; folder delete
+   899→  AlertDialog shows blast radius ("removes 1 preset") → deleted.
+   900→  B16 "Test Renamed" deleted after confirm → "Preset deleted".
+   901→  B17 "Survivor" survived full page reload under user created (badge 4).
+   902→  B18 cleanup: Survivor, Plankton, Kingish (copy), Kingish all deleted →
+   903→  localStorage {"v":1,"folders":[],"presets":[]}, tree "user created 0".
+   904→  B19 embedded folder Export .zip → "Export ready | 95 presets zipped and
+   905→  downloading." 0 console/page errors.
+   906→  B20 ove.userPresets.v1 valid JSON {v:1, folders:[], presets:0}.
+   907→  B21 delay "2" → red "Delay must be between 3 and 60 seconds." (committed
+   908→  value kept at 10s); "5" → error gone, badge "ON · every 5s"; uncheck OK.
+   909→- C22: PASS (with wording note). 390×844: scrollWidth 390 = clientWidth 390
+   910→  (no horizontal scroll); tree + management panel stack vertically (both
+   911→  320px wide) and stay usable (embedded select → note + Export/Import);
+   912→  6 lock badges render (VLM-confirmed). Footer: page content is 1313px tall
+   913→  so the footer is below the fold on first paint; it is flush with the
+   914→  document bottom and fully visible when scrolled to the end
+   915→  (footerBottom = 844 = viewportH). Desktop 1440×900: footer IS within the
+   916→  first paint (doc height exactly 900). Same mobile behavior as accepted in
+   917→  Tasks 11–13.
+   918→- D23: PASS. Session window of dev.log contains only prisma:query lines and
+   919→  GET 200s; zero error/warn/exception lines in the entire log; the single
+   920→  "[presets] embedded library drift detected — re-seeding from source" at
+   921→  line 251 predates this session (expected/informational). Repeated DELETE
+   922→  prisma lines on every GET are purgeVisitorJunk()'s indexed deleteMany —
+   923→  by design (v6.2 self-heal).
+   924→
+   925→Issues found:
+   926→- 1 (environmental, not an app bug): during the session the dev server
+   927→  pushed 4 "[Fast Refresh] rebuilding" HMR updates (delayed propagation of
+   928→  the 07:25–07:29 source changes; session began 07:31, no file changed
+   929→  after 07:29:46). One rebuild landed exactly on the first B12 "Save"
+   930→  click: the zustand store was re-initialized, editTarget cleared (chip +
+   931→  Save/Save As… buttons vanished) and no toast/save occurred. Re-establishing
+   932→  the target via Load Preset and re-clicking Save worked flawlessly with
+   933→  zero console errors. No app fix needed; restarting the dev server before
+   934→  future E2E sessions would avoid the race.
+   935→- 2 (observation): PUT /api/folders returns 405 instead of 403 (route
+   936→  exports no PUT). Mutation is still blocked; cosmetic difference only.
+   937→- 3 (observation): GET /api/presets/export still answers 200 server-side
+   938→  (read-only zip download). The UI export path is client-side JSZip as
+   939→  built; the legacy endpoint is harmless but could be removed for a fully
+   940→  client-side story.
+   941→- 4 (observation): on mobile 390×844 the footer is not within the first
+   942→  viewport paint (content is 1313px tall); it is the last element, flush
+   943→  with the document bottom when scrolled to the end. If "footer visible on
+   944→  first paint" is a hard mobile requirement, the layout would need a
+   945→  sticky-footer redesign.
+   946→- 5 (observation): "user created" root folder's Rename/Delete buttons are
+   947→  rendered disabled by design ("root of your library" protection) — buttons
+   948→  are present as the checklist expects, just not enabled for the root
+   949→  itself; user PRESETS get enabled Rename/Delete.
+   950→
+   951→---
+   952→Task ID: 15
+   953→Agent: main (Z.ai Code)
+   954→Task: v6.2 — security hardening for the shared VPS (openvisengine.com): protect
+   955→the embedded library from visitor edits/renames/deletes, and move "user
+   956→created" presets into each visitor's own browser so cross-visitor spam is
+   957→impossible.
+   958→
+   959→User requirement:
+   960→- Deleting/renaming/adding presets under embedded/ must not affect other
+   961→  visitors. User presets must live in the visitor's "temporary files" (site-
+   962→  accessible browser storage). No visitor-created garbage visible to others.
+   963→
+   964→Work Log:
+   965→- src/lib/preset-paths.ts (NEW, pure module shared client+server): ROOT,
+   966→  EMBEDDED_ROOT, USER_ROOT constants + isEmbeddedPath/isUserAreaPath +
+   967→  client-side twins of normalizeFolderPath/isValidName.
+   968→- src/lib/server/preset-tree.ts: constants now sourced from preset-paths;
+   969→  re-exports the helpers; doc updated (read-only model).
+   970→- src/lib/ava/user-presets.ts (NEW): the browser-stored user library —
+   971→  localStorage key ove.userPresets.v1, shape-checked + self-healing reads,
+   972→  quota-guarded writes, ids "local-<uuid>", caps (200 presets / 100 folders /
+   973→  128 KB per script), full CRUD (create/rename/delete preset, create/rename/
+   974→  delete folder with subtree moves + depth guard, zip-import batch). Spam
+   975→  physically cannot reach the server: nothing here ever calls fetch.
+   976→- src/lib/ava/preset-io.ts (NEW): client-side JSZip export (builds zip from
+   977→  the merged tree, browser download) + import (unpacks zip in-browser;
+   978→  remaps every entry into root/user created — embedded paths become the
+   979→  visitor's editable copies; 50 MB / 2000-entry caps).
+   980→- src/lib/store.ts: PresetItem unchanged; refreshPresets now MERGES server
+   981→  embedded library (user-area rows filtered out defensively) with
+   982→  listUserPresets() and allUserFolderPaths(); applyUserPresets() re-merges
+   983→  after local CRUD; settings persistence (band/beat/default script/randomize)
+   984→  is now localStorage-only — the debounced PUT /api/settings layer was
+   985→  deleted; stale randomScope heals to root/user created.
+   986→- src/app/page.tsx: useInitialLoad now uses refreshPresets() (merged tree) and
+   987→  reads configs exclusively from localStorage; no /api/settings fetch.
+   988→- Server hardening:
+   989→  * GET /api/presets — ensureSeeded upgraded with a FINGERPRINT self-heal:
+   990→    embedded subtree must exactly match BUILTIN+EMBEDDED (folder+name), else
+   991→    re-seeds (heals pre-hardening renames/deletes/injections even without a
+   992→    version bump); purgeVisitorJunk() deletes any isBuiltIn=false rows,
+   993→    user-area presets, and non-backbone folders on every GET; response serves
+   994→    only isBuiltIn rows in root/embedded/** + the 7 backbone folders.
+   995→  * POST /api/presets, PUT/DELETE /api/presets/[id], POST/PUT/PATCH/DELETE
+   996→    /api/folders, POST /api/presets/import → 403 with explanatory messages.
+   997→  * /api/settings route DELETED (404). /api/presets/export kept as a
+   998→    read-only maintainer backup endpoint (UI no longer uses it).
+   999→- src/components/ava/presets-tab.tsx rework: lock badge on root/embedded
+  1000→  folders; "read-only" chip in the panel; embedded folder → informational
+  1001→  note + Export/Import only; embedded preset → Load + "Copy to my presets"
+  1002→  (auto-uniquified name, lands in user created); user presets flagged with a
+  1003→  User icon and get Rename/Delete; all CRUD + zip import/export now local
+  1004→  (user-presets + preset-io libs, applyUserPresets re-merge); user created
+  1005→  empty-state hint; delete confirms say "from this browser".
+  1006→- src/components/ava/script-tab.tsx: Save on an embedded target → blocking
+  1007→  toast directing to Save As; Save As always lands in the user area
+  1008→  (embedded/root targets redirect to root/user created); saves are
+  1009→  updateUserPreset/createUserPreset (browser).
+  1010→- src/lib/version.ts → 6.2 (+history line). detect-tab.tsx stale comment fixed.
+  1011→- VERIFIED (subagent E2E, Task 15-11, 23/23 PASS): all curl mutations 403
+  1012→  (incl. PUT folders after cosmetic fix); GET serves 95 presets/7 folders/zero
+  1013→  user-area rows; junk-seeded DB (spam preset, injected row, vandal-renamed
+  1014→  "Gap The Mind", junk folders) fully self-healed on next GET; browser flows:
+  1015→  lock badges, read-only panel, Copy to my presets, create/rename/delete
+  1016→  preset + folder (incl. nested blast radius), Save-blocked-on-embedded +
+  1017→  Save As redirect, persistence across reload, client export toast (95 zipped),
+  1018→  randomize 3–60s validation, mobile 390×844 no horizontal scroll, zero
+  1019→  console errors; lint clean.
+  1020→- Committed as "v6.2 — read-only embedded library + per-visitor browser presets".
+  1021→
+  1022→Stage Summary:
+  1023→- Threat model closed: the server accepts ZERO visitor writes (403 on every
+  1024→  mutation endpoint), the embedded library self-heals against drift (rename/
+  1025→  delete/inject → fingerprint re-seed), and each visitor's presets live in
+  1026→  their own localStorage (merge is client-side). Spam/vandalism cannot cross
+  1027→  visitors by construction.
+  1028→- Migration note for the VPS: previously server-stored user presets are
+  1029→  abandoned (purged by self-heal); visitors re-import via zip if needed.
+  1030→  Settings (band/beat/default script) are per-browser now.
+  1031→- /api/presets/export intentionally kept: read-only maintainer backup of the
+  1032→  embedded library.
+  1033→
\ No newline at end of file
diff --git a/worklog.md b/worklog.md
index 1773154..98ce838 100755
--- a/worklog.md
+++ b/worklog.md
@@ -1030,3 +1030,207 @@ Stage Summary:
   Settings (band/beat/default script) are per-browser now.
 - /api/presets/export intentionally kept: read-only maintainer backup of the
   embedded library.
+
+---
+Task ID: 16-d
+Agent: general-purpose (E2E verifier)
+Task: v6.3 theme tick switch — end-to-end verification
+
+Work Log:
+- Read worklog Task 15 + 15-11 for context; read v6.3 sources read-only
+  (header.tsx theme switch, globals.css .light remap, version.ts 6.3,
+  help-panel/script-tab patches).
+- agent-browser desktop session 1440×900 at http://localhost:3000: cleared
+  localStorage, fresh load, dark-default + theme-pill geometry checks,
+  toggle to light, full tab walk (Presets/Script/Detect/Beat/Native +
+  Help panel), embedded preset select + Copy-to-my-presets panel, Create
+  Preset dialog in light AND dark, "Theme Test" create/delete toasts +
+  cleanup, persistence reloads (light→reload, dark→reload), rapid 5×
+  toggling, demo-track run for live VU meters + visualization, mobile
+  390×844 light + dark (scrollWidth, stacking, footer flush, pill
+  tappable), console + page-error checks after every phase.
+- ENVIRONMENT INCIDENT (diagnosed + documented, no source edits): for the
+  first ~12 min of the session the dev server served a STALE CSS chunk
+  ([root-of-the-server]__0f0ba101._.css, emitted 07:50:04, 158,839→
+  158,921 B) that contained the v6.3 `color-scheme: dark` addition but
+  NOT the `.light { --color-* }` block — so toggling set html.light +
+  checked state but the page stayed visually dark. Control test: the
+  current src/app/globals.css compiled through the project's own
+  @tailwindcss/postcss 4.1.18 (+ lightningcss 1.30.2) DOES emit .light —
+  source correct, server module graph stale (final 07:48:50 save never
+  propagated; same delayed-HMR class as Task 15-11 issue 1). A single
+  content-preserving `touch` of globals.css (md5 unchanged before/after:
+  2aa8062c…) triggered Turbopack's delayed rebuild at 08:04:59 → chunk
+  158,941 B now contains .light. All light-theme verdicts below were
+  re-verified against the real served CSS after that point (earlier
+  interim checks used a byte-identical injected copy of the .light block,
+  same results).
+- VLM (z-ai vision) cross-checks on 13 screenshots (light full page,
+  presets/script/help, dark default/toggled/script, dialog, toast, mobile
+  light/dark, stale-state evidence, live visualization).
+- Screenshots: tool-results/e2e-v63/ (37 files, 01…34).
+- Final state: browser closed; localStorage 'theme' key removed (fresh
+  dark default), ove.userPresets.v1 = {"v":1,"folders":[],"presets":[]};
+  server library untouched; scratch test dir removed; source files
+  unmodified (git status = builder's v6.3 changes only).
+
+Results:
+- 1: PASS — fresh load (no 'theme' key): html.dark, body bg zinc-950
+  (#09090b), text zinc-100 (#f4f4f5), footer "version 6.3 | engine ok",
+  title "OVE — Open Visualization Engine (v6.3)".
+- 2: PASS — pill Moon(x1135)|Switch(x1155,w32,unchecked,aria-label
+  "Switch to light theme")|Sun(x1193); BPM number box starts x1230 —
+  pill immediately LEFT of the emerald BPM readout, 6 px gaps, no
+  overlap/shift (VLM-confirmed).
+- 3: PASS — dark regression clean: tree 95 presets/7 folders, lock badges
+  on embedded folders, script editor #09090b bg + light mono text, Set
+  Beat bg #34d399 + emerald-950 text (7.8:1), no white boxes (VLM:
+  "no regressions").
+- 4: PASS — click flips switch right (aria-checked=true, knob translates,
+  track #059669 + white knob in light) and the ENTIRE chrome flips white:
+  body #ffffff/#18181b, wrapper zinc-950→white, panels/borders light
+  (before/after: 01→17/18/19). See env incident above for the stale-CSS
+  window at session start.
+- 5: PASS — light readability across ALL tabs: header (logo, source
+  buttons, demo slider, BPM readout deep green #059669, Set Beat
+  #059669/#022c22, pill); Presets (rows #27272a on white, ≈ badges
+  rose-400 #e11d48 on /10 tint — 60 in Amp Picks, counts 95/66/9/15/5/0,
+  note #71717a, Load Preset #059669 bg, Copy white/#18181b/#d4d4d8);
+  Script (editor white bg, #27272a mono, gutter #8b8b93, status
+  "✔ Compiled OK" #059669); Detect (labels #52525b/#71717a, live VU bars
+  #059669/#e11d48/#b45309 on light tracks with demo running); Beat
+  (SET BEAT #059669/#022c22, labels readable); Native (headings #27272a,
+  body #52525b, .ava token deep green); Help (code blocks #e4e4e7/40 bg +
+  #27272a text — v6.3 patch works); footer readable + "version 6.3";
+  VisualStage canvas stays BLACK (rgb(0,0,0)) with light border #e4e4e7.
+  VLM: no unreadable/low-contrast text, no dark leftovers.
+- 6: PASS — Create Preset dialog light: card #ffffff, heading/input text
+  #18181b, input bg #fafafa; same dialog dark: card #0a0a0a, input
+  white/4.5% bg + near-white text.
+- 7: PASS (with notes) — no white-on-white/black-on-black anywhere; body
+  text ≥4.6:1; accents clearly readable. Notes: emerald buttons ≈4.0:1,
+  help-panel emerald-300/90 tokens ≈2.5:1 (see Issues 2-3).
+- 8: PASS — light toast "Preset created — "Theme Test" created in this
+  browser" (white card via --popover, #18181b text); delete confirm +
+  "Preset deleted" toast same styling; localStorage cleaned afterwards.
+- 9: PASS — light + reload: html.light, switch checked, theme=light,
+  page renders white (with live CSS); toggle dark + reload: html.dark,
+  unchecked, theme=dark, page dark.
+- 10: PASS — 5 rapid clicks: end state light, html class/theme key/
+  switch in sync at every step, zero errors, no stuck states.
+- 11: PASS — console + page errors zero across the whole session (both
+  themes, ~10 loads, dialogs, toasts, toggling, mobile): only React
+  DevTools info, "[HMR] connected", "[Fast Refresh] rebuilding/done".
+- 12: PASS — mobile 390×844 light: scrollWidth 390 = clientWidth 390
+  (no horizontal scroll), theme pill visible + tappable (wrapped into
+  header row 1, no overlap), tree + panel stack (358 px), footer flush at
+  document bottom (footerBottom 1313 = docHeight 1313; below fold on
+  first paint — same as accepted in Task 15-11).
+- 13: PASS — mobile dark: same checks pass (no h-scroll, pill visible,
+  bg #09090b/text #f4f4f5).
+- 14: PASS — dev.log session window (lines 529-722): only GET 200s +
+  prisma:query; zero error/warn/exception lines. (Pre-session lines
+  443-510 contain builder-era transient errors — see Issue 5.)
+
+Issues found:
+- 1 (environmental, resolved mid-session, NO app bug): dev server served
+  a stale Turbopack CSS chunk missing the entire .light palette remap for
+  ~12 min (07:52-08:05) — theme toggle flipped state (html.light) but the
+  page stayed dark, and the switch track rendered white-on-dark. Root
+  cause: the final 07:48:50 globals.css save never propagated through
+  HMR (delayed/broken watcher state; 4 runtime-error full reloads from
+  the builder's mid-edit saves at 07:44-07:50 left the graph stale).
+  Content-preserving touch + delayed rebuild fixed it at 08:04:59.
+  Control compile of the current source through the project's own
+  toolchain emits .light correctly. Recommendation: RESTART the dev
+  server (or at least verify the served chunk contains .light) before
+  the next session and before any VPS deploy of v6.3 — a stale build
+  would ship a theme switch that visually does nothing.
+- 2 (minor, light-mode contrast): help-panel inline code tokens
+  (text-emerald-300/90 — e.g. [init], [frame], variable names in the
+  reference tables) resolve to #10b981 on white ≈ 2.5:1 — below WCAG AA
+  4.5:1 and even below 3:1; readable but washed-out. Consider deepening
+  the emerald-300 remap (e.g. to #059669) or switching these tokens to
+  emerald-400 in light mode.
+- 3 (minor, light-mode contrast): emerald action buttons (header Set
+  Beat, Load Preset, Beat-tab SET BEAT) are text-emerald-950 #022c22 on
+  bg-emerald-400 #059669 ≈ 4.0:1 — just under AA 4.5:1 for small text
+  (passes 3:1 large-text; dark-mode equivalent is 7.8:1). Borderline,
+  likely acceptable for bold button labels.
+- 4 (observation): script editor line-number gutter (text-zinc-600 →
+  #8b8b93 on white) ≈ 3.4:1 — auxiliary text, acceptable but dimmer
+  than body text.
+- 5 (observation, pre-existing): dev.log lines 443-510 (before this
+  session) contain 4× "⚠ Fast Refresh had to perform a full reload due
+  to a runtime error" plus transient "⨯ ReferenceError: useRef is not
+  defined at SourceControls (header.tsx:63)" GET / 500s — artifacts of
+  the v6.3 builder's mid-edit saves. Current source imports useRef
+  correctly; nothing recurred in this session.
+- 6 (observation): on mobile 390 px the theme pill wraps into header row
+  1 (next to the logo) rather than sitting beside the BPM readout as on
+  desktop — clean flex-wrap, no overlap; consistent with the header's
+  responsive design.
+- 7 (note): "Set Beat button … very dark green text" expectation —
+  confirmed #022c22 (emerald-950) on #059669; and the checklist's "help
+  headings readable green": Help section headings are zinc-400 gray by
+  design (unchanged from dark theme); the GREEN elements in Help are the
+  inline code tokens (see Issue 2).
+
+---
+Task ID: 16
+Agent: main (Z.ai Code)
+Task: v6.3 — light/dark theme tick switch in the header (user request: switch
+top-right, left of the BPM indicator; flip right = white theme).
+
+Work Log:
+- src/app/globals.css — light theme via palette REMAP under `.light` (the app
+  is styled with raw zinc/emerald/rose/amber utilities, so remapping those CSS
+  variables flips the whole chrome): zinc ramp inverted (950→#ffffff page,
+  100→#18181b text, 900→#fafafa panels, 800→#e4e4e7 hover/borders, 700→#d4d4d8
+  borders, 600→#8b8b93 hints); accents deepened one step for white
+  backgrounds (emerald-400→#059669, emerald-300→#10b981 so hovers still
+  lighten; rose-300/400, amber-300/400 likewise). color-scheme light/dark set
+  on .light/.dark. Unlayered class rules beat Tailwind's @layer theme, so the
+  remap wins with opacity variants too (color-mix keeps var references).
+- src/app/layout.tsx — ThemeProvider (next-themes, attribute="class",
+  defaultTheme="dark", enableSystem=false, disableTransitionOnChange);
+  hardcoded <html class="dark"> removed (next-themes sets it pre-paint).
+- src/components/ava/header.tsx — ThemeToggle pill (Moon | Switch | Sun,
+  h-11 matching the other header controls) in the right cluster as the first
+  child — immediately LEFT of the BPM readout. Left/unchecked = dark (default),
+  flipped right/checked = white theme. Mount guard via useSyncExternalStore
+  (lint-clean replacement for the setState-in-effect pattern); switch track:
+  zinc-600 unchecked / emerald-400 checked, default thumb colors verified for
+  all four theme×state combos.
+- Contrast patches: text-zinc-950 → text-emerald-950 on all emerald CTAs (12
+  spots, 7 files — near-black green on emerald in both themes); help-panel
+  code blocks bg-black/40 → bg-zinc-800/40; help-panel inline tokens
+  text-emerald-300/90 → text-emerald-400/90 (light: #059669/90 ≈ 4.3:1,
+  was 2.5:1); native-tab blockquote text-emerald-200/80 →
+  text-emerald-700/90 dark:text-emerald-200/80.
+- The visualization canvas intentionally KEEPS its black stage in light mode
+  (the "screen"); only the chrome flips.
+- src/lib/version.ts → 6.3 (+history line). Fixed a mid-edit useRef import
+  regression (500s during editing, resolved).
+- Dev-server ops: killed my pkill'd instance, restarted with double-fork
+  detach (( setsid bun run dev & )) — survives across tool sessions; verified
+  the served CSS chunk now contains the .light palette (was a stale Turbopack
+  chunk for ~12 min during verification — subagent diagnosed; restart fixed).
+- VERIFIED (subagent E2E 16-d, 14/14 PASS + my own post-restart smoke test):
+  dark default (html.dark, no theme key); toggle left of BPM (switch right
+  1187 < BPM left 1230), flips to html.light with white body/dark text; ALL
+  tabs readable in light (header, presets tree + locks + ≈ badges, white
+  script editor, detect VU bars, beat, native, help code blocks, footer);
+  dialogs + toasts themed correctly; Set Beat #059669 bg + #022c22 text;
+  VisualStage stays black with light border; persistence across reload both
+  ways; rapid 5× toggling stable; zero console/page errors; mobile 390×844
+  both themes no horizontal scroll, footer flush at document bottom.
+- Committed as "v6.3 — light/dark theme tick switch in the header".
+
+Stage Summary:
+- Theme = per-visitor preference (localStorage via next-themes), default
+  dark — matches the club aesthetic; light mode is a clean white studio look
+  with deepened emerald/rose/amber accents for contrast.
+- Implementation note for future styling: new UI should keep using the
+  zinc/emerald utilities (not raw hex) so both themes keep working; anything
+  on the emerald buttons should use text-emerald-950.