a30cfb39-1b53-4097-990f-27d01fb42f1f

src/app/page.tsx

@@ -17,8 +17,9 @@ import { VisualStage } from '@/components/ava/visual-stage'
 import { ControlPanel } from '@/components/ava/control-panel'
 import { FooterBar } from '@/components/ava/footer-bar'
 import { QueueBar } from '@/components/ava/queue-bar'
-import { applyScriptText, tapBeat } from '@/components/ava/audio-source'
+import { applyScriptText, setBootScriptSnapshot, tapBeat } from '@/components/ava/audio-source'
 import { STARTER_TEMPLATE } from '@/lib/ava/presets'
+import { releaseWakeLock, syncWakeLock, watchWakeLockVisibility } from '@/lib/ava/wake-lock'
 import {
   lsGetString,
   readStoredBandConfig,
@@ -105,6 +106,7 @@ function useInitialLoad() {
       // (Zai-Magic "Bass Bloom" — the megabuf particle bloom that remembers
       // every beat's hue) → any Zai-Magic preset → template
       let text: string | null = lsGetString('ava.defaultScript')
+      const usedSavedDefault = text !== null && text.trim() !== ''
       let startupPreset: (typeof presetsList)[number] | undefined
       if (!text) {
         startupPreset =
@@ -117,6 +119,12 @@ function useInitialLoad() {
       }
       if (!text) text = STARTER_TEMPLATE
       applyScriptText(text)
+      // v7.11: remember the untouched startup script — the Demo showcase
+      // only auto-engages while the editor still matches it (any difference
+      // is the visitor's own material). A SAVED default is the visitor's
+      // own material from the start, so it counts as their choice.
+      setBootScriptSnapshot(text)
+      if (usedSavedDefault) store.markManualChoice()
       if (startupPreset) store.setActivePresetId(startupPreset.id)
 
       // club mode: bring back the random-preset timer if it was on
@@ -146,10 +154,28 @@ function useSpaceToTap() {
   }, [])
 }
 
+/**
+ * v7.11 — keep the phone's screen on while music is playing. Any source but
+ * idle holds a screen wake lock (see lib/ava/wake-lock.ts); the moment the
+ * engine goes idle the lock is released and the device's normal inactivity
+ * dimming / sleep takes over again. Browsers silently drop the sentinel when
+ * the page is hidden, so a visibilitychange watcher re-acquires it on return
+ * while music is still going. Unsupported browsers degrade silently.
+ */
+function useWakeLockOnPlayback() {
+  const source = useAvaStore((s) => s.source)
+  useEffect(() => {
+    syncWakeLock(source !== 'idle')
+  }, [source])
+  useEffect(() => watchWakeLockVisibility(), [])
+  useEffect(() => () => releaseWakeLock(), [])
+}
+
 export default function Home() {
   useInitialLoad()
   useBeatWatcher()
   useSpaceToTap()
+  useWakeLockOnPlayback()
 
   return (
     <div className="flex min-h-screen flex-col bg-zinc-950 text-zinc-100 lg:h-screen lg:overflow-hidden">

src/components/ava/audio-source.ts

@@ -11,6 +11,7 @@ import { getEngine } from '@/lib/ava/engine'
 import type { TapResult } from '@/lib/ava/beat'
 import { validateScript } from '@/lib/ava/script'
 import type { ScriptError } from '@/lib/ava/script'
+import { STARTER_TEMPLATE } from '@/lib/ava/presets'
 import { DEMO_TRACK_COUNT, demoTrackTitle } from '@/lib/ava/audio'
 import { useAvaStore } from '@/lib/store'
 import { toast, useToast } from '@/hooks/use-toast'
@@ -325,16 +326,56 @@ function fileErrorMessage(err: unknown): string {
 /** The read-only folder that ships the hand-authored Zai-Magic presets. */
 const ZAI_MAGIC_FOLDER = 'root/embedded/Zai-Magic'
 
+// ---------------------------------------------------------------------------
+// v7.11 — the visitor's own selection vs. the welcome showcase
+// ---------------------------------------------------------------------------
+
+/** The script text this visit booted with (saved default / Bass Bloom /
+ *  template). Any later difference = the visitor's own material. */
+let bootScriptSnapshot = ''
+
+/** Capture the startup script (page boot) — the "untouched editor" baseline. */
+export function setBootScriptSnapshot(text: string): void {
+  bootScriptSnapshot = text.trim()
+}
+
+/**
+ * v7.11 — does this visitor have their OWN thing going? True when they
+ * loaded a preset (tree Load / double-click / Copy to my presets / created
+ * one), brought their own script material into the editor (typed, pasted,
+ * hash-imported, file-loaded — anything that differs from the untouched
+ * startup text), saved their own default startup script, or are running
+ * their own mix mode. The Demo showcase auto-engages ONLY while this is
+ * false; otherwise the Demo button just plays music and touches nothing —
+ * a custom script can be tested and debugged against the demo track
+ * without any fear of it being replaced.
+ */
+export function visitorHasOwnSelection(): boolean {
+  const s = useAvaStore.getState()
+  if (s.manualChoice) return true
+  // their own club-mode mix is running — the demo must not re-scope it
+  if (s.randomize || s.sequenceMode) return true
+  const cur = s.scriptText.trim()
+  if (!cur) return false
+  // the untouched starter template (fresh visit / New button) is not own material
+  if (cur === STARTER_TEMPLATE.trim()) return false
+  // anything else that differs from the untouched startup text is theirs
+  return cur !== bootScriptSnapshot
+}
+
 /**
  * Music just started but no preset is active (the visitor never picked one —
  * e.g. they are running their own untitled draft): load the default preset,
  * Zai-Magic "Bass Bloom", so something beat-reactive is on screen the moment
  * audio arrives. Engine-only — the editor's unsaved text is never touched
- * (the same courtesy random switching pays).
+ * (the same courtesy random switching pays). v7.11: a visitor with their OWN
+ * material (custom draft / saved default) is left completely alone — the
+ * forced default used to replace their running script.
  */
 function ensureDefaultPreset(): void {
   const s = useAvaStore.getState()
   if (s.activePresetId !== null) return
+  if (visitorHasOwnSelection()) return
   const preset = s.presets.find(
     (p) => p.folderPath === ZAI_MAGIC_FOLDER && p.name === 'Bass Bloom',
   )
@@ -353,7 +394,8 @@ function ensureDefaultPreset(): void {
  * expand it so the visitor sees what is playing), then start the sequence —
  * v7.4: every Zai-Magic preset IN ORDER, one every 20 seconds, wrapping
  * around, for the one play-through (Sequence, not Random — the demo pass
- * should walk the whole family, not repeat picks).
+ * should walk the whole family, not repeat picks). v7.11: only ever called
+ * for a visit that made no choice of their own (see visitorHasOwnSelection).
  */
 function startShowcaseMix(): void {
   const s = useAvaStore.getState()
@@ -370,7 +412,8 @@ function startShowcaseMix(): void {
  * Stop button, or switching to another source) unwind the showcase state:
  * the Demo flow force-checked the mix mode (Sequence), so it gets unchecked
  * again. The visitor's own selection (the last preset that was running)
- * stays put.
+ * stays put. v7.11: only called when the showcase actually engaged — a
+ * visitor whose own Random/Sequence mix was already running keeps it.
  */
 function retireDemoShowcase(): void {
   const s = useAvaStore.getState()
@@ -430,27 +473,37 @@ export function useAudioSource() {
     const index = readDemoNext()
     try {
       await engine.audio.startDemo(index)
+      // v7.11: the welcome showcase (Bass Bloom + Zai-Magic Sequence) only
+      // engages for a visit that made NO choice of their own — no preset
+      // loaded (double-click / Load / a copy), no custom script material in
+      // the editor, no own mix running. Everyone else keeps their selection:
+      // Demo just plays the track.
+      const showcase = !visitorHasOwnSelection()
       // v7.3/v7.10: single pass — when the track runs out (or is stopped, or
       // replaced by another source) the engine fires onDemoEnded exactly
       // once, WITH the reason: sync the store to idle (the landing overlay
-      // returns), uncheck the randomizer the showcase had checked, and —
-      // when the pass truly ENDED (natural finish or the Stop button) —
+      // returns), uncheck the showcase mix ONLY when the showcase engaged,
+      // and — when the pass truly ENDED (natural finish or the Stop button) —
       // advance the collection place so the next Demo click plays the next
       // track. A source switch keeps the visitor's place.
       engine.audio.onDemoEnded = (reason) => {
         syncSource()
-        retireDemoShowcase()
+        if (showcase) retireDemoShowcase()
         if (reason === 'ended' || reason === 'stop') writeDemoNext(index + 1)
       }
       syncSource()
-      // showcase flow (v7.2/v7.4): nothing active → Bass Bloom, then the
-      // Zai-Magic sequence takes over — every preset in order, 20 s each,
-      // for this one play-through
+      // showcase flow (v7.2/v7.4/v7.11): nothing active and nothing of the
+      // visitor's own → Bass Bloom, then the Zai-Magic sequence takes over —
+      // every preset in order, 20 s each, for this one play-through. With
+      // the visitor's own selection, BOTH are skipped (ensureDefaultPreset
+      // holds its own guard as well).
       ensureDefaultPreset()
-      startShowcaseMix()
+      if (showcase) startShowcaseMix()
       toast({
         title: 'Demo track playing',
-        description: `${demoTrackTitle(index)} (${index + 1} of ${DEMO_TRACK_COUNT}) · Zai-Magic preset sequence -- every preset in order, 20 s each, one play-through.`,
+        description: showcase
+          ? `${demoTrackTitle(index)} (${index + 1} of ${DEMO_TRACK_COUNT}) · Zai-Magic preset sequence -- every preset in order, 20 s each, one play-through.`
+          : `${demoTrackTitle(index)} (${index + 1} of ${DEMO_TRACK_COUNT}) · your selection stays active -- the demo never touches your preset or the editor.`,
       })
     } catch (err) {
       syncSource()

src/components/ava/presets-tab.tsx

@@ -167,6 +167,9 @@ function useLoadPreset() {
       if (result.ok) {
         st.setActivePresetId(preset.id)
         st.setEditTarget({ id: preset.id, name: preset.name, folderPath: preset.folderPath })
+        // v7.11: an explicitly loaded preset (double-click / Load button) is
+        // the visitor's own choice — the Demo showcase must never override it
+        st.markManualChoice()
         // No "Preset loaded" toast (v7.3): the footer's SCRIPT: label
         // already echoes the running preset — the popup was intrusive and
         // only compile errors genuinely need the attention grab.
@@ -527,6 +530,7 @@ export function PresetsTab() {
       applyScriptText(STARTER_TEMPLATE)
       st.setActivePresetId(res.preset.id)
       st.selectPreset(res.preset.id)
+      st.markManualChoice() // v7.11 — a created preset is the visitor's own choice
       st.setTab('script')
       toast({
         title: 'Preset created',
@@ -671,6 +675,7 @@ export function PresetsTab() {
         const st = useAvaStore.getState()
         st.toggleFolder(USER_ROOT, true)
         st.selectPreset(res.preset.id)
+        st.markManualChoice() // v7.11 — a copied preset is the visitor's own choice
         toast({
           title: 'Copied to your presets',
           description: `"${res.preset.name}" is now yours to edit -- stored in this browser only.`,

src/components/ava/script-tab.tsx

@@ -1,7 +1,9 @@
 // AVA — Script tab: the custom visualization script editor.
 //
-// Toolbar: Apply, Save (to the preset picked in the Presets tab, when a save
-// target is set), Save As…, Save as Default, Save to File, Load from File,
+// Toolbar: Apply, Save (to the preset picked in the Presets tab when a save
+// target is set; v7.11 also with NO target — one click stores the current
+// script as a new preset under "user created", auto-named from its name:
+// header), Save As…, Save as Default, Save to File, Load from File,
 // Script⇢Hash / Hash⇢Script (v7.7 — share the script as one short Unicode
 // string and paste one back), New, Help. Editor: line-number gutter +
 // monospace textarea (synced scroll, Tab inserts two spaces), error lines
@@ -48,7 +50,7 @@ import { sanitizeFileName } from '@/components/ava/shared'
 import { useToast } from '@/hooks/use-toast'
 import { cn } from '@/lib/utils'
 import { USER_ROOT, isUserAreaPath } from '@/lib/preset-paths'
-import { createUserPreset, presetIsLocal, updateUserPreset } from '@/lib/ava/user-presets'
+import { createUserPreset, listUserPresets, presetIsLocal, renameUserPreset, updateUserPreset } from '@/lib/ava/user-presets'
 
 /** Middle-truncated save-target path for the chip: "root/embedded/…/Name". */
 function formatSavePath(folderPath: string, name: string): string {
@@ -58,6 +60,16 @@ function formatSavePath(folderPath: string, name: string): string {
   return `${segs.slice(0, 2).join('/')}/…/${name}`
 }
 
+/** First free name in a folder: "Base", "Base (1)", "Base (2)" … */
+function uniqueName(base: string, taken: Set<string>): string {
+  if (!taken.has(base)) return base
+  for (let i = 1; i < 1000; i++) {
+    const candidate = `${base} (${i})`
+    if (!taken.has(candidate)) return candidate
+  }
+  return `${base} (${Date.now().toString(36).slice(-4)})`
+}
+
 export function ScriptTab() {
   const { toast } = useToast()
   const scriptText = useAvaStore((s) => s.scriptText)
@@ -80,6 +92,17 @@ export function ScriptTab() {
   // v7.7 — share-string dialogs
   const [shareOutOpen, setShareOutOpen] = useState(false)
   const [shareInOpen, setShareInOpen] = useState(false)
+  // v7.11 — the display name a Hash⇢Script import arrived with (the script's
+  // name: header, else the share-string label); the one-click Save uses it
+  // when the script itself carries no name
+  const [pendingName, setPendingName] = useState<string | null>(null)
+  // v7.11 — "Give This Preset a Name" dialog (renames the just-saved
+  // auto-named preset: nameless scripts / duplicate conflicts)
+  const [renameOpen, setRenameOpen] = useState(false)
+  const [renameValue, setRenameValue] = useState('')
+  const [renameError, setRenameError] = useState<string | null>(null)
+  const [renameBusy, setRenameBusy] = useState(false)
+  const [renameTarget, setRenameTarget] = useState<{ id: string; name: string; folderPath: string } | null>(null)
 
   // debounced live validation (compile is cheap, scripts are small)
   useEffect(() => {
@@ -159,6 +182,111 @@ export function ScriptTab() {
     }
   }
 
+  /**
+   * v7.11 — one-click save with NO target picked: create a new preset under
+   * "user created" from the current editor script. Auto-named from the
+   * script's name: header (e.g. a hash import of "Spectrum Bars:[▼…]" saves
+   * as "Spectrum Bars"); a nameless script lands as "Empty Name", a
+   * conflict as "Base (1)", "Base (2)"… — and whenever the name had to be
+   * invented, the "Give This Preset a Name" dialog opens right after so the
+   * just-saved preset can be renamed in one extra step. Nothing is ever
+   * lost to a naming problem: the preset is saved FIRST, renamed second.
+   */
+  const saveAsNewPreset = async () => {
+    if (saving) return
+    setSaving(true)
+    try {
+      const v = validateScript(scriptText)
+      if (!v.ok) {
+        toast({
+          title: 'Fix the compile errors first',
+          description: 'The script must compile before it can be saved as a preset.',
+          variant: 'destructive',
+        })
+        return
+      }
+      // candidate name: the script's own name: header, else the share-string
+      // label it arrived with (Hash⇢Script import)
+      let base: string | null = null
+      const metaName = v.meta?.name?.trim()
+      if (metaName && metaName !== 'Untitled') base = metaName
+      if (!base && pendingName) base = pendingName.trim() || null
+      if (base) {
+        // preset names must stay path-safe (no slashes / control characters)
+        base = base.replace(/[/\u0000-\u001f\u007f]+/g, ' ').replace(/\s+/g, ' ').trim().slice(0, 120).trim()
+        if (!base) base = null
+      }
+      const taken = new Set(
+        listUserPresets().filter((p) => p.folderPath === USER_ROOT).map((p) => p.name),
+      )
+      const autoName = uniqueName(base ?? 'Empty Name', taken)
+      const invented = base === null || autoName !== base
+      const res = createUserPreset({
+        name: autoName,
+        content: scriptText,
+        folderPath: USER_ROOT,
+        author: v.meta?.author || 'you',
+      })
+      if (!res.ok) {
+        toast({ title: 'Save failed', description: res.error, variant: 'destructive' })
+        return
+      }
+      applyUserPresets()
+      setEditTarget({ id: res.preset.id, name: res.preset.name, folderPath: res.preset.folderPath })
+      const st = useAvaStore.getState()
+      st.selectPreset(res.preset.id)
+      st.toggleFolder(USER_ROOT, true)
+      toast({
+        title: `Saved as "${res.preset.name}"`,
+        description: invented
+          ? 'Stored under "user created" in this browser -- give it a better name in the dialog.'
+          : 'Stored under "user created" in this browser.',
+      })
+      if (invented) {
+        // the name had to be invented (nameless script / duplicate conflict)
+        // — the preset is SAFE; offer the rename as one extra step
+        setRenameTarget({ id: res.preset.id, name: res.preset.name, folderPath: res.preset.folderPath })
+        setRenameValue(base ?? '')
+        setRenameError(null)
+        setRenameOpen(true)
+      }
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  /** v7.11 — confirm the "Give This Preset a Name" dialog: rename the
+   *  just-saved preset to the visitor's name (stays open on conflicts). */
+  const applyRename = async () => {
+    if (!renameTarget || renameBusy) return
+    const trimmed = renameValue.trim()
+    if (!trimmed) {
+      setRenameError('Enter a name first.')
+      return
+    }
+    setRenameBusy(true)
+    try {
+      const res = renameUserPreset(renameTarget.id, trimmed)
+      if (!res.ok) {
+        setRenameError(res.error)
+        return
+      }
+      applyUserPresets()
+      const st = useAvaStore.getState()
+      if (st.editTarget?.id === res.preset.id) {
+        st.setEditTarget({ id: res.preset.id, name: res.preset.name, folderPath: res.preset.folderPath })
+      }
+      st.selectPreset(res.preset.id)
+      setRenameOpen(false)
+      toast({
+        title: 'Preset renamed',
+        description: `Saved as "${res.preset.name}" in ${res.preset.folderPath} (this browser).`,
+      })
+    } finally {
+      setRenameBusy(false)
+    }
+  }
+
   const openSaveAs = () => {
     if (!editTarget) return
     setSaveAsName(editTarget.name)
@@ -226,6 +354,9 @@ export function ScriptTab() {
       const text = await file.text()
       const result = applyScriptText(text)
       if (result.ok) {
+        // v7.11: a file from disk is the visitor's own material — the Demo
+        // showcase must never clobber it
+        useAvaStore.getState().markManualChoice()
         const meta = validateScript(text).meta
         toast({ title: 'Script loaded', description: `"${meta?.name || file.name}" applied to the engine.` })
       } else if (result.error) {
@@ -301,7 +432,7 @@ export function ScriptTab() {
         >
           <Play className="size-3.5" /> Apply
         </Button>
-        {editTarget && (
+        {editTarget ? (
           <Button
             size="sm"
             onClick={() => void saveToTarget()}
@@ -311,6 +442,18 @@ export function ScriptTab() {
           >
             <Save className="size-3.5" /> Save
           </Button>
+        ) : (
+          validation?.ok && (
+            <Button
+              size="sm"
+              onClick={() => void saveAsNewPreset()}
+              disabled={saving}
+              className="h-9 gap-1.5 bg-emerald-400 px-3 text-emerald-950 hover:bg-emerald-300"
+              title='Save the current script as a NEW preset under "user created" -- auto-named from the script name: header'
+            >
+              <Save className="size-3.5" /> Save
+            </Button>
+          )
         )}
         {editTarget && (
           <Button
@@ -374,6 +517,7 @@ export function ScriptTab() {
           onClick={() => {
             setScriptText(STARTER_TEMPLATE)
             setEditTarget(null)
+            setPendingName(null)
           }}
           className="h-9 gap-1.5 border-zinc-700"
           title="Start over from the template (clears the save target)"
@@ -486,12 +630,73 @@ export function ScriptTab() {
         </DialogContent>
       </Dialog>
 
+      {/* v7.11 -- rename the just-auto-named preset (nameless script /
+          duplicate conflict): the preset is already saved under "user
+          created"; this dialog only gives it the visitor's own name */}
+      <Dialog
+        open={renameOpen}
+        onOpenChange={(o) => {
+          setRenameOpen(o)
+          if (o) setRenameError(null)
+        }}
+      >
+        <DialogContent className="sm:max-w-sm">
+          <DialogHeader>
+            <DialogTitle>Give This Preset a Name</DialogTitle>
+            <DialogDescription>
+              The script is already saved as “{renameTarget?.name ?? 'Untitled'}” under “user created” in this
+              browser. Name it anything you like -- the rename applies instantly.
+            </DialogDescription>
+          </DialogHeader>
+          <div>
+            <Input
+              value={renameValue}
+              onChange={(e) => {
+                setRenameValue(e.target.value)
+                setRenameError(null)
+              }}
+              placeholder="Preset name"
+              autoFocus
+              aria-label="New preset name"
+              className="h-9 border-zinc-700 bg-zinc-900 font-mono text-xs"
+              onFocus={(e) => e.currentTarget.select()}
+              onKeyDown={(e) => {
+                if (e.key === 'Enter') void applyRename()
+              }}
+            />
+            {renameError && <p className="mt-1.5 text-[11px] text-rose-400">{renameError}</p>}
+          </div>
+          <DialogFooter>
+            <Button variant="outline" className="h-9 border-zinc-700" onClick={() => setRenameOpen(false)}>
+              Keep as-is
+            </Button>
+            <Button
+              className="h-9 gap-1.5 bg-emerald-400 text-emerald-950 hover:bg-emerald-300"
+              disabled={renameBusy}
+              onClick={() => void applyRename()}
+            >
+              <Save className="size-3.5" /> {renameBusy ? 'Renaming…' : 'Save Name'}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+
       {/* v7.7 -- share-string dialogs */}
       <ScriptToHashDialog open={shareOutOpen} onOpenChange={setShareOutOpen} scriptText={scriptText} />
       <HashToScriptDialog
         open={shareInOpen}
         onOpenChange={setShareInOpen}
-        onImport={(text) => setScriptText(text)}
+        onImport={(text, name) => {
+          setScriptText(text)
+          setPendingName(name)
+          // the editor now holds FOREIGN content — the previous save target
+          // no longer matches what is in the editor, so a later Save must not
+          // overwrite it (v7.11: Save creates a new preset instead)
+          setEditTarget(null)
+          // imported material is the visitor's own — the Demo showcase must
+          // never clobber it (v7.11)
+          useAvaStore.getState().markManualChoice()
+        }}
       />
 
       <input

src/components/ava/share-dialogs.tsx

@@ -164,8 +164,10 @@ export function HashToScriptDialog({
 }: {
   open: boolean
   onOpenChange: (open: boolean) => void
-  /** Load the decoded script into the editor (script-tab wires this). */
-  onImport: (script: string) => void
+  /** Load the decoded script into the editor (script-tab wires this).
+   *  v7.11: also hands back the script's display name (its name: header,
+   *  else the share-string label) so Save can auto-name the new preset. */
+  onImport: (script: string, name: string | null) => void
 }) {
   const { toast } = useToast()
   const [input, setInput] = useState('')
@@ -219,12 +221,12 @@ export function HashToScriptDialog({
 
   function load() {
     if (!decoded) return
-    onImport(decoded.script)
+    onImport(decoded.script, decoded.name ?? null)
     onOpenChange(false)
     toast({
       title: 'Script loaded from share string',
       description: `"${decoded.name ?? 'Untitled'}" -- ${decoded.lines} lines in the editor.${
-        decoded.compiles ? ' Hit Apply to run it.' : ' Fix the errors, then Apply.'
+        decoded.compiles ? ' Hit Apply to run it, or Save to keep it as a preset.' : ' Fix the errors, then Apply.'
       }`,
     })
   }

src/lib/ava/wake-lock.ts

@@ -0,0 +1,128 @@
+// OVE — Screen Wake Lock manager (v7.11).
+//
+// Mobile browsers dim and eventually turn the screen off after a few seconds
+// of inactivity — correct for reading, fatal for a music visualizer propped
+// on a table. While audio is actually playing (demo / mic / file / link —
+// anything but idle) the app holds a screen wake lock so the visuals stay
+// visible; the moment playback stops the lock is released and the phone's
+// normal inactivity timeout takes over again.
+//
+// API notes (developer.mozilla.org/en-US/docs/Web/API/Screen_Wake_Lock_API):
+//   • navigator.wakeLock.request('screen') → Promise<WakeLockSentinel>
+//   • The browser SILENTLY releases the sentinel when the page becomes
+//     hidden (app switch / screen lock) — so a 'visibilitychange' listener
+//     re-acquires it when the visitor comes back and music is still going.
+//   • request() rejects when unsupported (older iOS Safari, Firefox Android
+//     pre-126), when the document is hidden, or when a platform setting
+//     refuses — every rejection is swallowed: the lock is a nice-to-have,
+//     never a blocker.
+//   • Wake locks are free — no battery drain beyond the screen itself, and
+//     the page already renders at full tilt while playing.
+
+/** Minimal structural type — lib.dom versions vary in Wake Lock coverage. */
+interface WakeLockSentinelLike {
+  readonly released: boolean
+  release: () => Promise<void>
+  addEventListener: (type: 'release', listener: () => void) => void
+  removeEventListener: (type: 'release', listener: () => void) => void
+}
+
+interface WakeLockLike {
+  request: (type: 'screen') => Promise<WakeLockSentinelLike>
+}
+
+/** The held sentinel (null = not held / browser released it). */
+let sentinel: WakeLockSentinelLike | null = null
+/** Whether a lock is currently WANTED (music playing). */
+let wantActive = false
+/** Guards against overlapping request() calls. */
+let requesting = false
+/** The sentinel's own release listener (kept so it can be detached). */
+let releaseListener: (() => void) | null = null
+
+function navigatorWakeLock(): WakeLockLike | null {
+  if (typeof navigator === 'undefined') return null
+  const nav = navigator as Navigator & { wakeLock?: unknown }
+  const wl = nav.wakeLock
+  if (!wl || typeof wl !== 'object') return null
+  const typed = wl as Partial<WakeLockLike>
+  return typeof typed.request === 'function' ? (typed as WakeLockLike) : null
+}
+
+/** Drop our reference when the browser auto-releases (page hidden). */
+function onSentinelRelease(): void {
+  sentinel = null
+  releaseListener = null
+}
+
+async function acquire(): Promise<void> {
+  if (sentinel !== null || requesting) return
+  const wl = navigatorWakeLock()
+  if (!wl) return
+  requesting = true
+  try {
+    const s = await wl.request('screen')
+    // state may have flipped to "stopped" while the promise was in flight
+    if (!wantActive) {
+      try {
+        await s.release()
+      } catch {
+        /* already gone */
+      }
+      return
+    }
+    sentinel = s
+    releaseListener = onSentinelRelease
+    s.addEventListener('release', releaseListener)
+  } catch {
+    /* unsupported / hidden / refused — degrade silently */
+  } finally {
+    requesting = false
+  }
+}
+
+function dropSentinel(): void {
+  const s = sentinel
+  sentinel = null
+  if (s) {
+    if (releaseListener) s.removeEventListener('release', releaseListener)
+    releaseListener = null
+    s.release().catch(() => {
+      /* already released */
+    })
+  }
+}
+
+/**
+ * Hold or release the screen wake lock according to playback. Called with
+ * `true` whenever a source starts, `false` whenever the engine goes idle.
+ */
+export function syncWakeLock(active: boolean): void {
+  wantActive = active
+  if (!active) {
+    dropSentinel()
+    return
+  }
+  if (typeof document !== 'undefined' && document.visibilityState === 'visible') {
+    void acquire()
+  }
+  // hidden right now (rare — playback needs a gesture, but a queued playlist
+  // could land here): the visibilitychange listener below acquires on return.
+}
+
+/** Explicit teardown (hook unmount / pagehide). */
+export function releaseWakeLock(): void {
+  syncWakeLock(false)
+}
+
+/**
+ * Re-acquire the lock when the page becomes visible again while music is
+ * still playing (the browser always drops it on hide). Returns a cleanup.
+ */
+export function watchWakeLockVisibility(): () => void {
+  const onVisibility = () => {
+    if (document.visibilityState === 'visible' && wantActive) void acquire()
+  }
+  document.addEventListener('visibilitychange', onVisibility)
+  return () => document.removeEventListener('visibilitychange', onVisibility)
+}

src/lib/release-notes.ts

@@ -39,6 +39,24 @@ export interface ReleaseNote {
 }
 
 export const RELEASE_NOTES: ReleaseNote[] = [
+  {
+    version: '7.11',
+    name: 'Wake lock, a respectful Demo, one-click save',
+    changes: [
+      {
+        kind: 'added',
+        text: 'The screen stays on while music plays: on phones and tablets the site now holds a screen wake lock for as long as any audio source is live, then lets go the moment playback stops so the device\'s normal screen timeout takes over again.',
+      },
+      {
+        kind: 'improved',
+        text: 'The Demo Track button stopped hijacking the preset selection. When a preset is already loaded (tree double-click, Load, a copied preset) or the editor holds custom script material, Demo just plays the track and leaves everything untouched -- the Zai-Magic Sequence showcase now only starts for a visit that never picked or typed anything, so a custom script can be built and debugged against the demo track without fear of it being replaced.',
+      },
+      {
+        kind: 'improved',
+        text: 'One-click saving in the Script tab: a valid script shows the Save button even with no save target picked, and one click stores it under "user created", auto-named from the script\'s name header (a hash import of "Spectrum Bars:[▼…]" saves as "Spectrum Bars"). Nameless scripts land as "Empty Name", collisions as "(1)", "(2)"… -- and in those cases a "Give This Preset a Name" dialog opens immediately so the just-saved preset can be renamed on the spot.',
+      },
+    ],
+  },
   {
     version: '7.10.1',
     name: 'Spectrum edge unfrozen',

src/lib/store.ts

@@ -187,6 +187,14 @@ interface AvaState {
   editTarget: EditTarget | null
   /** Preset currently running on the engine (tree indicator). */
   activePresetId: string | null
+  /** v7.11 — true once THIS visit made an explicit choice: loaded a preset
+   *  (tree Load / double-click / copy-to-my-presets / created one), brought
+   *  the visitor's own script material into the editor (typed / pasted /
+   *  hash-imported / file-loaded), saved a default startup script, or runs
+   *  their own mix mode. While false the Demo button may still run the
+   *  welcome showcase; once true, Demo never touches the selection.
+   *  Deliberately NOT persisted — every visit starts fresh. */
+  manualChoice: boolean
   /** Timed preset mixing (club mode): Random (no repeats) or, v7.4, Sequence
    *  (in-order cycling with wrap-around). The two are mutually exclusive —
    *  ticking one unticks the other; both share one delay + folder scope and
@@ -219,6 +227,8 @@ interface AvaState {
   selectPreset: (id: string | null) => void
   setEditTarget: (t: EditTarget | null) => void
   setActivePresetId: (id: string | null) => void
+  /** v7.11 — flag this visitor as having made their own choice (see field). */
+  markManualChoice: () => void
   setRandomize: (on: boolean) => void
   /** v7.4: Sequence mode — in-order cycling; mutually exclusive with Random. */
   setSequenceMode: (on: boolean) => void
@@ -371,6 +381,7 @@ export const useAvaStore = create<AvaState>()((set, get) => ({
   expandedFolders: {},
   editTarget: null,
   activePresetId: null,
+  manualChoice: false,
   randomize: false,
   sequenceMode: false,
   randomIntervalSec: 10,
@@ -481,6 +492,8 @@ export const useAvaStore = create<AvaState>()((set, get) => ({
 
   setActivePresetId: (id) => set({ activePresetId: id }),
 
+  markManualChoice: () => set({ manualChoice: true }),
+
   setRandomize: (on) => {
     // v7.4 mutual exclusion: ticking Random unticks Sequence (turning one
     // OFF never lights the other — the visitor's explicit choice)

src/lib/version.ts

@@ -12,6 +12,35 @@
 // warns in the console when the two drift apart.
 //
 // History:
+//   7.11 — wake lock, a respectful Demo button, one-click save. While any
+//           audio source is live the site holds a Screen Wake Lock so phone
+//           and tablet screens stay on (released the moment the engine goes
+//           idle so the normal inactivity dimming returns; browsers silently
+//           drop the sentinel on hide, so a visibilitychange watcher
+//           re-acquires it on return while music is still going;
+//           unsupported browsers degrade silently). The Demo Track button no
+//           longer force-engages the Sequence checkbox: a visitor who loaded
+//           a preset (tree double-click / Load / Copy to my presets / created
+//           one), brought their own script material into the editor (typed,
+//           pasted, Hash⇢Script, file), saved their own default startup
+//           script, or runs their own Random/Sequence mix keeps their
+//           selection -- Demo just plays the track (the showcase's tree
+//           re-scope, 20 s interval and retire-on-end all skip too; a new
+//           per-visit manualChoice flag + a boot-script snapshot decide, and
+//           ensureDefaultPreset gained the same guard so mic/file/link never
+//           clobber a custom draft either; the showcase now only starts for
+//           a visit that never picked or typed anything). Script tab: a valid
+//           script shows the Save button with NO save target needed -- one
+//           click creates a preset under "user created", auto-named from the
+//           script's name: header (a hash import of "Spectrum Bars:[▼…]"
+//           saves as "Spectrum Bars"), "Empty Name" when nameless, " (1)"/
+//           " (2)"… suffixes on conflicts, and whenever the name had to be
+//           invented a "Give This Preset a Name" dialog opens to rename the
+//           just-saved preset in one step (the preset is always saved FIRST,
+//           renamed second, so nothing is ever lost to a naming problem).
+//           Hash⇢Script imports clear the stale save target (the editor now
+//           holds foreign content) and pass the decoded label through as the
+//           save-name fallback when the script has no name: header
 //   7.10.1 — the frozen right edge of spectrum visuals. getspec()/sv mapped
 //           the bar field across the whole FFT (bin 2 ... Nyquist, ~12 Hz to
 //           24 kHz), but music carries almost nothing above ~16 kHz and every
@@ -311,4 +340,4 @@
 
 export const APP_NAME = 'Open Visualization Engine'
 export const APP_SHORT = 'OVE'
-export const APP_VERSION = '7.10.1'
+export const APP_VERSION = '7.11'