// OVE — app identity + version stamp.
//
// Single source of truth for the product name and version shown in the UI
// (header, footer, document title). Bump APP_VERSION whenever we ship a
// large change so the running build can always be identified at a glance —
// useful both for the z.ai Version History and for naming local backups
// (v6.0 = rename to Open Visualization Engine + version indicator).
//
// History:
//   7.5.1 — Link dialog width fix: text no longer escapes the dialog box.
//           Root cause: Radix dialogs lay their children in an implicit CSS
//           grid whose single column sizes to the widest child's min-content;
//           the RECENT LINKS rows carry truncate spans (white-space: nowrap),
//           and Chromium measures a nowrap flex item's full text width for
//           that measurement — so a long saved title (e.g. "Bobby Foxx — This
//           Is Why We Can't Have Nice Things (Official Music Video)") blew
//           the column ~40 px past the 448 px dialog, and EVERY child (title,
//           description, input + Load, rows, footer) laid out beyond the
//           right border. Fix: the shared Dialog/AlertDialog content now pins
//           the column to minmax(0,1fr) — capped at the available width, so
//           no nowrap content can ever stretch a dialog again (covers every
//           dialog app-wide) — the Link dialog widened to max-w-lg for
//           comfier wrapping, and min-w-0 + break-words added on the
//           recents/playlist containers and error text as belt-and-braces
//   7.5 — yt-dlp compatibility: single tracks resolve by DOWNLOAD + CONVERT
//           instead of proxying the extractor's stream URL. The old stream
//           URLs were IP-locked (googlevideo bakes in the resolver's IP),
//           expired within hours, and arrived as webm/opus — a container
//           Safari & co. refuse ("The media resource … was not suitable").
//           The server now runs the operator's pipeline per track:
//             yt-dlp -f bestaudio/best -x --audio-format mp3
//                    --audio-quality 0 -o "<dir>/%(title)s.%(ext)s" URL
//           — audio-only download, universal MP3 at VBR-0 (~245 kbps), the
//           video's real title preserved for the Playing: label. The
//           finished file streams same-origin with full Range support from
//           a per-track workspace dir (30-min sliding TTL + orphan sweeper);
//           /api/audio/stream gained a file-serving mode. Hardening around
//           it: shared failure classifier for both yt-dlp passes (metadata +
//           download), 180 s download budget, 300 MB cap, bot-wall/stale-
//           extractor answers unchanged, ffmpeg-missing degrades to the old
//           proxy path (logged once), queue look-ahead lead 15 s → 60 s so
//           playlist transitions don't stall behind conversions
//   7.4 — Sequence mode: a second mix checkbox next to Random. Ticked, it
//           cycles the scope folder's presets IN ORDER (the tree's exact
//           top-to-bottom order) instead of shuffling — and when it moves
//           past the last preset it wraps back to the first, so the folder
//           loops forever. Random and Sequence are mutually exclusive
//           (ticking either one unticks the other; both share the same
//           delay and folder scope), Random now never loads the same preset
//           twice in a row, and Sequence holds its breath through silence
//           exactly like Random does. The Demo showcase now runs SEQUENCE —
//           the one play-through walks every Zai-Magic preset in order
//           (20 s each) rather than repeating random picks, and when the
//           demo stops, whichever mode it checked is unchecked again
//   7.3 — demo-flow refinements: the Demo Track is a single pass — it plays
//           "Neural Mecha Pulse" once through and stops (a demo, not a radio
//           station). However it ends (natural finish, Stop, or switching to
//           another source) the showcase unwinds: the randomizer the Demo
//           flow force-checked is unchecked again, and the visitor lands
//           back on the "Select an audio source" overlay. Preset-change
//           popups are gone ("Preset loaded" / "Random preset" / "Default
//           preset running") — the footer's SCRIPT: label already echoes
//           every change, so the toasts were pure intrusion; only compile
//           errors still toast. Club-mode randomizer now respects silence:
//           when no music is playing it never re-shuffles the selected
//           preset, even with the checkbox on — it waits for the next track
//   7.2.1 — Supernova (Zai-Magic) preset fix: the particle kill condition
//           (|px|+|py| > 2.4) was physically unreachable — drag caps a
//           particle's total travel at vel/1.6 ≈ 1.0, so nothing ever
//           crossed 1.4, nothing ever died, and since respawning requires a
//           dead particle, the per-beat "budget = n" detonation could never
//           fire after the initial one — the preset exploded once on load,
//           then faded to permanent black. Now every beat force-clears the
//           whole 620-particle field in [beat] (guaranteed full re-detonation
//           on the very same frame), fully-cooled particles die by fade so
//           long beat gaps leave a gentle ember drizzle instead of black,
//           and each blast re-randomizes its geometry (no two explosions
//           alike). Embedded library re-seeded (seed marker 7.01)
//   7.2 — new-visitor showcase flow. Defaults for first-time visitors:
//           the Black + Purple Outline theme with the Blue highlight
//           (previously royal purple + yellow), and Zai-Magic "Bass Bloom"
//           as the startup preset (previously the first Synth-C classic).
//           The idle overlay's Demo Track button now carries an animated
//           reflective shimmer (skewed light band sweeping left→right every
//           3.2 s, reduced-motion safe) to draw the click — and that one
//           click starts the full showcase: the demo track plays while the
//           preset tree selects + expands Zai-Magic, randomize switches on
//           scoped to that folder with a 20-second change interval. Music
//           started with NO preset active (own draft running / selection
//           cleared) auto-loads Bass Bloom. Preset changes — manual load,
//           the random mix, the Demo flow — no longer hard-cut: the engine
//           snapshots the outgoing frame and blur-dissolves it into the new
//           preset over 700 ms (progressive blur + easeOutCubic fade + a
//           slight scale-up so the softening edges never gap; plain
//           crossfade where ctx.filter is unsupported)
//   7.1 — real demo track + a beat detector that survives real music.
//           The Demo button now plays "Neural Mecha Pulse" (the operator's
//           mastered industrial-EDM banger, public/demo-track.mp3, loops
//           gaplessly) instead of the synthetic techno pattern — a real
//           recording is the honest test: deep sub for the bass bands,
//           driving mids, crisp highs, and a kick buried in sustained
//           sub-bass. That last part exposed the 6.x detector as fundamentally
//           broken on mastered music: a LEVEL threshold can never see the
//           kick through the sub (peak-to-mean caps at ~1.2× → sporadic
//           fires, phantom 120-BPM locks from the minInterval floor).
//           v7.1 rewrites detection the way real beat trackers work
//           (aubio/librosa-style): a full-band spectral-flux ONSET envelope
//           → autocorrelation over 300–1000 ms lags with a log-BPM prior →
//           comb-filter phase with grid hysteresis → beats fired on an
//           absolute grid kept glued by a PLL pull. Headlessly validated
//           against the actual track PCM (AnalyserNode chain replicated
//           frame-for-frame): locks the true ~133 BPM (the song drifts
//           130.7→133.1 — the grid TRACKS it) in 1.9 s, 92% beat-gap
//           regularity, confidence 0.99 through the body; techno/hip-hop
//           patterns lock exactly; silence yields zero beats. Known limit:
//           sparse kick-vs-snare backbeats (dnb) may lock half-tempo —
//           stable, and two taps of Set Beat correct it. Visitor-stored
//           beat configs migrate (floorLevel changed units, level → flux).
//           The demo BPM slider is gone (a real track's tempo is detected,
//           not dialed in) — replaced by a track-name chip in the header
//   7.00 — Zai-Magic: ten hand-authored presets in root/embedded/Zai-Magic
//           built around BEAT-SYNCED COLOR — the color wheel turns on the
//           kick, palettes swap per beat / per 4-beat bar, megabuf particles
//           remember the hue of the beat that spawned them + new script
//           tools: hsvr/hsvg/hsvb (HSV→RGB channels), smoothstep and the
//           beatage kick-envelope variable — all documented in the help
//           panel. (Numbered 7.00 rather than 6.10 — a new preset family
//           plus new script-language features is a major release; 6.9.3 was
//           the last patch of the 6.x line.) Beat engine fixes underneath so
//           the Demo track actually
//           locks tempo (was sporadic): demo synth remixed for detection
//           (hot kick owning the 20–100 Hz band, off-beat bassline voiced
//           C3+ with a sidechain pump — chronological envelope events!),
//           and the detector's default threshold 1.4 → 1.2 (the 170 ms FFT
//           window caps a clean kick's peak-to-mean at ~1.5×, so 1.4 fired
//           only sporadically and the BPM never locked)
//   6.9.3 — canonical domain fix: metadataBase/og:url/og:image pointed at
//           openvisualengine.com (a DEAD domain baked in by 6.9.1) while the
//           real site is openvisengine.com — Facebook's "corrupted image"
//           error was its crawler fetching the image from a host that serves
//           nothing; all share URLs now use the correct short domain
//   6.9.2 — share-image fix: og:image re-encoded as BASELINE JPEG (the
//           6.9.1 progressive encoding rendered fine in every browser but
//           Facebook's Sharing Debugger rejected it as "corrupted"), swapped
//           in the title-card artwork (gradient wordmark over three
//           visualizations) and added a ?v=2 cache-bust so crawlers fetch it
//   6.9.1 — social share preview: Open Graph + Twitter Card metadata with
//           a 1200×630 screenshot of the app (public/og-image.jpg) — sharing
//           openvisualengine.com on Facebook/X/WhatsApp/Discord now shows the
//           big image card instead of a bare link
//   6.9 — house account: anonymous visitors play YouTube links through
//         the operator's shared disposable-account cookie (server-side
//         fallback under secrets/, never exposed) — YouTube bot walls stop
//         applying to guests; visitor's own login always wins. Engine fix
//         underneath: Deno runtime shipped in bin/ (YouTube requires a JS
//         runtime for signature/n-challenge solving on authenticated
//         sessions — without it, logged-in extractions return no formats)
//   6.8.2 — login friction cut to ~4 clicks: the exported cookies.txt /
//           Cookie-Editor JSON file can be dragged straight onto the
//           login box (or picked via “Import the exported file…”) — no
//           opening the file, no copy/paste; “Log out” / sign-out
//           revocation note added (the official Google OAuth flow can't
//           power the site: Google's APIs never hand out stream URLs and
//           restricted-scope verification would reject an audio player)
//   6.8.1 — cookie login made foolproof: the login dialog recognizes raw
//           Cookie headers, cookies.txt exports AND Cookie-Editor JSON,
//           validates the paste LIVE through one shared parser (a single
//           cookie's value — like a bare LOGIN_INFO string — gets an honest
//           "this will not log you in" warning), and the how-to steps lead
//           with the one-click extension export for Chrome AND Firefox
//   6.8 — self-healing audio engine: when YouTube changes their mechanics
//         the server detects the stale extractor, updates yt-dlp in the
//         background (verified GitHub release download, atomic swap) and the
//         player retries seamlessly behind an "Updating in Background"
//         notice; bot walls answer "Google login required…" with an Open
//         Settings action, and unfixable failures get the honest
//         "A back-end problem has occurred. Please try again later."
//   6.7 — lazy playlist queue: a playlist link becomes a queue of URLs that
//         streams ONE song at a time (each track is resolved by yt-dlp only
//         right before it plays — next-track look-ahead at ≤15 s to go),
//         queue bar with skip/jump/replay + server-side caps (max 2 parallel
//         extractions); music-service framework: Spotify + Apple Music are
//         registered providers whose playback ships in a later update
//         (logins already save, links answer with an honest notice)
//   6.6 — music service logins (Settings tab): YouTube / YouTube Music,
//         SoundCloud, Spotify, Apple Music cookie login, encrypted on the
//         visitor's computer; Link button gains playlist picking + uses the
//         login to bypass bot walls
//   6.5 — Settings tab (replaces the parked Native tab): theme picker with
//         base chrome (Royal Purple / Matte Black / Black + Purple Outline /
//         Light) × selectable highlight color (Purple, Yellow, Blue, Green,
//         Red, Orange), all per-visitor; simple OVE logo as the site favicon
//   6.4 — beat detection suspends when no music is playing/loaded (no ghost
//         beats after Stop, BPM resets) + dark theme restyle: royal purple
//         chrome with light-yellow highlights
//   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
//         generated visual (16 families × seeded parameters), approx badge
//   6.0 — renamed to "Open Visualization Engine" + footer version stamp
//   5.0 — folder-tree Presets page (Task 9–11 state, restored in Task 12)
//   4.0 — link audio source (yt-dlp resolve + stream proxy)

export const APP_NAME = 'Open Visualization Engine'
export const APP_SHORT = 'OVE'
export const APP_VERSION = '7.5.1'