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daniel-c-harvey 9cf6bb4cf2 docs(phase-10): spec Mix detail hero+meta overlay mirroring Sessions (shared ReleaseHeroOverlay recommended)

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PLAN.md — DeepDrftHome forward roadmap

Forward-looking roadmap. Sits alongside CONTEXT.md (architecture orientation) and COMPLETED.md (history). Per CONTEXT.md §6, items move from here to COMPLETED.md when work lands; do not delete completed entries.

Organised by theme, not by date. Themes are roughly ordered by current product weight, not commitment. Nothing here carries a timeline unless it explicitly says so.

0. Baseline — what just landed

A two-part audit (design + streaming) ran on 2026-05-17 and the fixes for Critical, Major, and Minor findings are now on dev. The remainder of this plan assumes that baseline. In summary the audit-pass fixed:

Index concurrency — VaultIndexDirectory no longer drops the lock before its async disk write; the index file can no longer be clobbered by interleaved writers.
Repository semantics — TrackRepository.Update now fails-fast when an Id is not found instead of silently issuing an INSERT.
Streaming Criticals — concurrent-seek race in the client, dirty trailing bytes leaking out of the ArrayPool-rented buffer, final-tail audio dropped at EOF below the minimum decode frame, and the assumption that the first network chunk contains the whole WAV header.
17 design and streaming Majors/Minors across all eight projects — format-validation alignment between processor/offset/decoder, IAsyncDisposable on the player provider, cancellation tokens threaded through the HTTP path, structured logging into the FileDatabase subsystem, sort-sentinel cleanup, sundry DRY/SRP tightenings.

What this means for the roadmap: the streaming substrate is solid. Future work can build on top of it rather than around it. The remaining items in TODO-V2.md that did not land are deferred as features, not bugs — they are captured below under Phase 1.

Phase 1 — Streaming features deferred from the audit

These were flagged during the audit but classified as feature work, not defect fixes. They are listed in rough order of user-visible impact.

1.3 Preload / prefetch of the next track

Split as of 2026-06-15. This item bundled two things: (a) a queue model ("a notion of next track") and (b) preload/prefetch (begin the next track's bytes during the current tail). The queue half (a) is now absorbed into Phase 11 (commitment 7 — Daniel: "now is the natural time for that"; full spec in product-notes/phase-11-public-site-enhancements.md §3c). The preload half (b) remains deferred here and still gates crossfade (1.4) and gapless (1.5). The open question below — queue in IPlayerService vs. a separate orchestrator — is answered in the Phase 11 spec (strong steer: a separate IQueueService above the single-slot player; final call staff-engineer's at implementation). When Phase 11's queue lands, the preload below becomes "add a subscriber to the queue's already-known next track," not a fresh queue design.

What (deferred — preload only): No mechanism to begin the next track's stream during the tail of the current. Each play is a cold fetch.
Why it matters: Prerequisite for both crossfade (1.4) and gapless (1.5). Also a perceived-latency win on its own — track-change feels instant when the bytes are already in flight.
Shape: A second HttpClient request kicked off when the current track passes a configurable threshold (e.g. last 10 seconds). Bytes accumulate into a staged StreamDecoder instance rather than the live one. Promotion to "current" happens at end-of-stream or on user-selected next. The "next track" it prefetches comes from Phase 11's IQueueService — that dependency is now satisfied by the queue work, not an open question.

1.4 Crossfade

What: Smooth A→B transition with overlapping fade-out / fade-in.
Why it matters: DJ/mix aesthetic that fits the DeepDrft collective's electronic-music context. Distinguishing UX from generic "next track."
Shape: Architecturally two simultaneous PlaybackScheduler instances suffice — each owns its own gain node, crossfaded via GainNode.gain.linearRampToValueAtTime. The wiring is the work, not the audio graph itself.
Prerequisite: 1.3 (Preload) — there is nothing to fade into without prefetch.

1.5 Gapless playback

What: Eliminate the inter-track silence that exists today.
Why it matters: Important for live-set rips, mix tapes, anything authored to flow continuously.
Shape: The decoder must be able to start the next track's first buffer scheduled exactly at the end of the current one's last buffer (sample-accurate, not wall-clock). With PlaybackScheduler's existing 500 ms lookahead this is mechanically achievable — the next track's first AudioBufferSourceNode.start(t) is set to the previous track's end time.
Prerequisite: 1.3 (Preload). Also needs to play nicely with 1.2 because gapless across formats is hard (encoder padding/priming on MP3 in particular).
Constraint: Truly sample-accurate gapless requires knowing the priming/padding sample counts of the source format. Out of scope for WAV-only; revisit when format diversity lands.

1.6 Track-skip on error

What: A failed processStreamingChunk aborts the entire load with no recovery path.
Why it matters: One corrupt frame at byte 4M of a 100 MB stream currently means the listener loses the entire track. Should at minimum surface a clear error and (optionally) skip past the bad region.
Shape: Two-level response.
- Cheap: catch in the streaming loop, surface a user-visible error, advance the gallery to the next track if a queue exists.
- Richer: byte-scan forward to the next valid frame header for the format and resume. Format-dependent — only worth doing once 1.2 lands.

1.7 Safari compatibility

What: Two known Safari edge cases.
- webkitAudioContext.close() is async-but-not-Promise on older Safari (≤ ~14); await resolves immediately and the next initialize() can run against a not-yet-closed context.
- iOS Safari < 15 had streaming-fetch quirks; HttpCompletionOption.ResponseHeadersRead behaviour is not guaranteed there.
Why it matters: Real listener share. iOS in particular is a primary listening surface for music.
Shape: For the close() race — detect webkitAudioContext and poll state === "closed" with a short timeout instead of trusting the await. For the fetch quirks — first decide the minimum supported iOS version; if pre-15 is in scope, fall back to a non-streaming fetch path and accept the latency.
Open question: What's the floor? Decide before designing the fallback. iOS 15+ as the floor would let us drop the second concern entirely.

Phase 2 — Product surface: gallery, browsing, ingestion

These follow from CONTEXT.md §5. Direction is strongly implied but no specific UI has been committed.

Phase 6 — CMS Enhancements (Completed)

See COMPLETED.md for Phase 6 (§6.1, §6.3) and entity-prep (§6.2 model layer) which landed on dev in June 2026.

6.2 Card-contextual filtering of the Tracks page — `[superseded by §8]`

What: Make the Album and Genre dashboard cards navigate into a filtered /tracks view (e.g. clicking an album card shows only that album's tracks), rather than the unfiltered table.
Why: Turns the dashboard from a read-only summary into a navigation hub — the natural next step once the cards exist.
Why deferred: The dashboard cards aggregate across all albums/genres — there is no single album/genre to filter to from a top-level count card. Meaningful per-album/per-genre navigation needs an intermediate browse surface (a list of albums, a list of genres) for the admin to pick from — i.e. it's really a CMS analogue of the public AlbumsView/GenresView, not a property of the summary cards. That's a larger surface than the dashboard itself and shouldn't be smuggled in. The GET api/track/page endpoint already accepts album= and genre= query filters, so the API substrate is ready; the missing piece is the CMS browse UI and the filter plumbing in TrackList.
Superseded: §8 (CMS Track Browser) builds exactly the intermediate browse surface this item was waiting on — Album Mode and Genre Mode are the CMS analogue of AlbumsView/GenresView, and the filter plumbing into GetPagedAsync is part of §8's data contract. This item folds into §8; do not implement it separately.

Phase 3 — New content kinds

3.1 Live / session content

What: The home page advertises "Live Sessions" and "Video Content (coming soon)". No data model exists for these.
Why it matters: Honour the home page copy. Also differentiates the site from a generic track gallery — live sessions and video are the collective's authored output.
Shape: Speculative; no commitment yet.
- Likely new entity table(s) sibling to TrackEntity (SessionEntity, VideoEntity?) — or a polymorphic MediaEntity with discriminator. The choice affects how much code in TrackService / TrackController can be reused.
- New vault type(s). MediaVaultType.Media exists and is the obvious home for video; sessions are probably still Audio.
- New routes, new UI surfaces, new player considerations (video has its own playback element and does not go through the WAV decoder).
Prerequisite: Probably 2.1 (vault wiring proof) and a decision on the entity model before any code lands.
[speculative] — direction inferred from home-page copy, not a Daniel-confirmed commitment.

Phase 4 — Infrastructure / delivery

4.3 Dual-write rollback / dead-letter log

What: If content-side write succeeds and SQL-side write fails, audio is orphaned in the vault. No compensating mechanism exists.
Why it matters: A latent data-integrity issue. Materially riskier once web upload (2.4) exists.
Shape: Audit suggested a DeadLetterLog recording orphaned entryKeys for a periodic maintenance pass. Lighter than full transactional rollback (which the dual-database split fundamentally cannot give us).
Prerequisite: None. Worth landing alongside or just before 2.4.

Phase 5 — Documentation backlog

5.1 Folder-level CLAUDE.md sweep

What: Eight folder-level CLAUDE.md files need writing/rewriting per the brief in DOC_PLAN.md. Five are rewrites (drift from the .NET 10 upgrade and structural moves); three are new (DeepDrftWeb.Services, DeepDrftContent.Services — the two libraries where most domain logic now lives — plus the open question on DeepDrftContent.Services/FileDatabase/README.md).
Why it matters: The agent guidance files are how every future implementer (human or agent) gets oriented in a directory. They are currently misleading in ways that will cause wrong assumptions on first contact — claiming .NET 9, referencing MediaPath that has been EntryKey for two migrations, describing a FileDatabase/ tree inside DeepDrftContent that has moved out, and missing entirely for the two *.Services libraries.
Shape: Doc-keeper executes against DOC_PLAN.md. Order of operations and the per-folder briefs are already specified there.
Prerequisite: None. Can run fully in parallel with any feature work.
Constraint: Wait on Daniel for the DeepDrftContent.Services/FileDatabase/README.md judgement call before that file changes (retire, keep + refresh, or replace with a CLAUDE.md). The other seven can proceed without that decision.

Phase 7 — Shared UI Components

Reusable presentational components in DeepDrftShared.Client (the RCL consumed by both the public site and the CMS). Distinct from the player stack and CMS surfaces — these are host-agnostic building blocks both apps compose.

Phase 8 — CMS Track Browser

Three browse modes for the CMS /tracks page — Track, Album, Genre — selected by a toggle, each deep-linkable so the public home page can link straight into a mode. One view-model (DI-scoped, matching the TracksViewModel pattern) feeds all three views; the divergence is in rendering, not data paths (per the standing "same data, different uses" preference). This supersedes the deferred §6.2 — Album and Genre modes are the intermediate browse surface that item was waiting on. Full spec: product-notes/phase-8-cms-track-browser.md (normalization gate, component decomposition, VM design, URL scheme, data contracts, open questions).

§8.0 landed on 2026-06-11 — a breaking TrackEntity normalization has been completed and is stable on dev. §8.1–§8.5 are now unblocked. The Waveform Pre-Processing tab is removed, folded into an in-grid status column + per-row/page-level generate actions (see §8.2).

A small set of items that are real but don't fit a phase yet. Surface them when they become relevant rather than committing now.

Identity / accounts. Currently no user concept. Needed before web upload (2.4); also a precondition for favourites, listening history, per-user playlists. Decide the shape before any of those lands. [speculative] until Daniel signals interest.
ITrackService interface. Audit-suggested. Low value today (one consumer pair); higher value when the test surface expands beyond FileDatabase.
Test coverage outside FileDatabase. Tests today cover the FileDatabase subsystem comprehensively and nothing else. As features in Phases 1–4 land, test scope should expand — at minimum WavOffsetService, AudioProcessor, TrackService (both sides), and the streaming player services. Not a phase of its own; an attached cost to feature work.

Phase 9 — Release Medium Types

Releases gain a top-level medium discriminator above the existing ReleaseType. Three media: Studio CUTS (Cut — the only medium that uses Single/EP/Album), Live SESSIONS (Session — a single live track with a distinct hero image), DJ MIXES (Mix — a single long track with a preprocessed high-resolution waveform datum). This touches the data model, the API, the CMS, and the public site.

The public home page already carries the three-medium framing as editorial cards (Studio / Live / DJ Mix — COMPLETED.md §8.6, landed 2026-06-12), but those cards have no destinations and nothing below the copy layer knows what a medium is. Phase 9 makes the medium real and gives those cards somewhere to point.

Architectural spine — discriminator enum + optional metadata table. ReleaseMedium is a plain enum column on ReleaseEntity. A medium that needs data beyond the base release (Session's hero image, Mix's waveform datum) gets its own 1:1 metadata table; a medium that needs nothing extra (Cut) is the base ReleaseEntity. This is Open/Closed at the schema level — a future medium (e.g. Video, §3.1) adds an enum value and optionally one metadata table, and changes zero existing tables. The alternatives (one wide nullable table; an EF type hierarchy) both collapse to the god-table the Phase 8 normalization moved away from — rejected. Full design, contracts, and the SOLID rationale: product-notes/phase-9-release-medium-types.md.

Design discipline throughout: extension, not modification. Where a per-medium mapping is unavoidable (card → browser, medium → API projection, medium → detail hero), keep it in one table per concern — never a scattered three-arm switch. Drive CMS cards and nav sub-items off Enum.GetValues<ReleaseMedium>() + a display-metadata lookup, so a new medium surfaces automatically.

The ReleaseType-only-for-Cut invariant. Single/EP/Album is meaningful only when Medium == Cut. Enforce as a domain rule (service layer ignores/resets ReleaseType for non-Cut; CMS hides the field unless Cut; ReleaseDto.ReleaseType is nullable, nulled at the single entity→DTO mapping point for non-Cut so one producer enforces and no consumer needs the rule), not a DB constraint — by choice, not necessity: EF Core supports check constraints first-class (HasCheckConstraint, versioned in migrations, Npgsql-supported), but the invariant is advisory ("meaningless," not "invalid") and the read model enforces it at one point. The column stays on ReleaseEntity as a named exception to the metadata-table pattern: a CutMetadata table was considered and rejected because the /cuts hot path reads ReleaseType on every card and Phase 8 §8.0 just landed the column (see spec §1). Future media must not copy this — the default remains the metadata table.

Sequenced as four waves. Wave 1 is a prerequisite for everything; within Waves 2–4 the lettered tracks are parallel.

Dependency summary: 1 → 2 → 3 → 4. Wave 4 (public site) can begin once Wave 2's api/release family is stable; both Wave 4 build and acceptance are independent of Wave 3 (CMS) — the body-less POST api/release/{id}/mix/waveform trigger (9.2.B) can seed real waveform datum for acceptance testing without any CMS in existence, and hero images seed via a script against 9.2.B likewise.

Waves 1–7 are landed (COMPLETED.md §9). Wave 6 closes two functional gaps a post-landing smoke-test survey surfaced — surfaces the medium taxonomy did not reach, not regressions. Wave 7 hardens the single-track-per-medium rule from a CMS-form convention into a real domain invariant — the one place the medium taxonomy is declared but not enforced below the UI.

9.8 Wave 8 — Remediation (fully landed; all tracks complete)

Daniel tested the landed Phase 9 surface end-to-end and produced a punch-list of corrections before the phase is called complete. These are not new features — they are the gap between what the Wave 1–7 specs built and what hands-on use wants. The theme is the same one Phase 9 has carried throughout: the medium taxonomy reaching every surface it should, and the browse surfaces matching the mental model rather than the implementation's first cut.

Two surfaces dominated: the CMS Release Archive (the card-grid landing is the wrong shape — Daniel wants medium tabs, not navigate-away cards) and the public Archive (the three-card overview is dead weight; the searchable all-releases view is the archive — release-cardinal, decided). The Mix Visualizer redesign (8.K) was pulled out of Phase-9-completion scope and ran as a post-Phase-9 wave from a finished spec (product-notes/phase-9-mix-visualizer-redesign.md); it has now also landed.

Open questions resolved (Daniel, 2026-06-13): 8.H is decided H2 (a new release-cardinal searchable browser at /archive; cascade: /tracks demoted from nav, route kept; mobile ARCHIVE → the browser; three-card overview fully retired); 8.I drops GENRES from the nav only (route kept); 8.F makes the Session hero optional-but-warn-if-missing; 8.E defaults the ALL-tab Add Track to Cut with the medium selector staying user-changeable. A new track 8.L consolidates the release-name/track-name pair into a single name for single-track media (derived track name kept synced, decided), and 8.M (split off 8.L) retires the legacy TrackNew/TrackEdit forms by folding them into the batch forms to reduce code surface.

Full track decomposition, acceptance criteria, and parallel/dependent analysis: product-notes/phase-9-wave-8-remediation.md.

Dependency shape: 8.B is the foundation for the CMS tab work (8.A consumes the shared grid; 8.C/8.E layer on once 8.A lands). 8.L follows 8.G and coordinates with 8.E/8.F (same forms). 8.M (legacy-form retirement) follows 8.L and is architectural (route map + addressing decision). On the public side, 8.H (decided H2 — the new release-cardinal archive) gates 8.I. All Wave 8 tracks are landed — Phase-9-completion gate (8.A–8.J + 8.L), 8.M, and the post-Phase-9 8.K Mix Visualizer redesign. Landed tracks: 8.A, 8.B, 8.C, 8.D, 8.E, 8.F, 8.G, 8.H, 8.I, 8.J, 8.L (2026-06-13); 8.M (2026-06-14); 8.K (2026-06-14).

Phase 10 — Mix Visualizer WebGL2 Renderer

The landed Canvas 2D Mix visualizer (8.K) renders at 1–2 FPS and cannot afford the planned effects — a staff-engineer analysis found the per-frame killers (full-viewport shadowBlur, CSS backdrop-filter, per-frame getBoundingClientRect) structural to the approach, and the planned effects (bulge, lava-lamp detach, a morphing 2D color field, glass) are all per-pixel/per-frame work — exactly what Canvas 2D is worst at and a fragment shader is best at.

Decision (Daniel, explicit): rebuild as a WebGL2 fragment-shader renderer. No Canvas 2D stopgap — "WebGL as step 1, no pussyfooting." This supersedes 8.K §E's Canvas-2D-default recommendation; the "industry-standard, well-commented, no tricks" discipline carries forward as textbook WebGL2 with a commented shader. Target a smooth 60 FPS. Strictly read-only (no playback-control changes); the duration-derived ~333 samples/sec datum (8.K §F) and the existing Blazor↔JS bridge are both preserved — the datum now lands as a GPU texture rather than a CPU-walked array.

Adds a controls row above the mix details / below the back button: four continuous, session-persistent sliders — resolution (relocated 8.K zoom), bubblyness (box→liquid bulge), detach ("unleash the lava lamp" — blobs pinch off and rise), color-shift speed (gradient morph rate). The headline visual is a living 2D navy↔moss gradient field (theme tokens from DeepDrftPalettes) that varies per-bar and shifts along time, never static; plus an in-shader glass treatment (specular/Fresnel/frosted/refraction — no CPU backdrop-filter). Persistence mirrors MixVisualizerZoomState (widen to a MixVisualizerControlState holding all four).

Full design, renderer architecture, the four effects, acceptance criteria, and phasing: product-notes/mix-visualizer-webgl-renderer.md.

Sequenced as four waves. Wave 1 (renderer swap at parity — prove WebGL2 on screen at 60 FPS, bridge intact, no new effects) is the load-bearing prerequisite. Wave 2 (controls row + widened state) and Wave 3 (the four effects in the shader) both follow Wave 1; the four effects within Wave 3 are independently shippable and tunable. Deferred (Daniel): control-range guards and motion-speed coupling to bubblyness — he tunes bad ranges by hand once on screen. Landed: Wave 1 (2026-06-15). Wave 2 (2026-06-15). Wave 3 (2026-06-15).

Wave 4 — detail-page polish + controls rework (presentation only; the final wave). A UI/placement pass over the Mix detail page — no renderer, state, bridge, or mapping change. (1) The four controls move out of the always-visible row into a popover (MudPopover, SharePopover-idiom) opened by a new bespoke lava-lamp icon button anchored top-right of the body, across from the ← Back link (recommend a new TopRightAction slot on ReleaseDetailScaffold, laid as a SpaceBetween row with the back link). (2) The lava-lamp SVG lives in DeepDrftShared.Client/Common/DDIcons.cs in the hand-rolled gas-lamp style (currentColor, 24×24 viewBox, raw-string const) — a recognizable lamp with two-three suspended blobs. (3) The four MudSliders become four RadialKnobs (DeepDrftShared.Client/Components/RadialKnob.razor) in a row in the popover, each carrying its existing Material icon (ZoomIn/BubbleChart/Air/Palette) as an adjacent MudIcon caption — RadialKnob has no icon slot (its Label is SVG text), so icons sit beside each knob. Knobs bind Value/ValueChanged to the unchanged MixVisualizerControlState via the same OnXChanged handlers + NotifyChanged() seam the sliders use today (resolution via MixZoomMapping fraction; other three normalized [0,1]; HoldValue=false for live feel). (4) Widen the Mix body to match the Sessions detail page — MudContainer MaxWidth="Large" (~1280px, up from the scaffold's 760px), Mix-scoped so Track detail is unaffected. Depends on Wave 3 merged (the knobs drive the Wave 3 effects) and supersedes the controls-row design (product-notes/mix-visualizer-webgl-renderer.md §3 → §7). Read-only contract intact; no knob is a seek surface. Full design + acceptance: that spec's §7.

Phase 10 — Reframe (Lava): Waves R1–R4

A major reframe of the Mix visualizer's effects, controls, and color model, folded under this same Phase 10 as a reframe wave-set (Waves R1–R4 — labelled to stay unambiguous against the landed Waves 1–4 above). It builds on the landed Phase 10 renderer infrastructure (pipeline, datum texture, playhead interp, bridge, widened body, lava-lamp trigger) but replaces what it paints. Daniel tested the Phase 10 effects end-to-end and rejected the visual result: the lava read as "giant disconnected circles," the colors drifted to cyan (an HSL saturation-boost artifact), and the waveform and lava read as two unrelated things sharing a canvas. The diagnosis (staff-engineer research pass) is that the rejected look is structural to the effect approach, not a tuning miss.

This supersedes the original Phase 10 (Waves 1–4) effects/controls/color design — product-notes/mix-visualizer-webgl-renderer.md §4 (effects) and §7 (popover-controls) are marked superseded with a pointer to the reframe spec. The renderer infrastructure carries forward unchanged.

The three reframes:

Lava → CPU-physics wax blobs. Keep the single-pass WebGL2 fragment renderer; add a small CPU-side per-frame physics step modeling ~16–32 Lagrangian "wax blobs" (position/velocity/temperature/radius) uploaded as uniforms and blended with smin SDF metaballs. The waveform and lava share the same plane WITH real 2D elastic collision (blob↔waveform-boundary + blob↔blob) — the waveform pushes the fluid out of its way (read-only authority preserved; the fluid never deforms the waveform). Refined by Daniel's Wave R2 eval: the fluid must read flat (an evenly-lit unified body, NOT blobs with bright pointed centers / cone-like radial gradients) and melt into one fluid (low viscosity / strong coalescence — "behave more like a fluid," not stiff globs in contact; the slow wax-like motion damping and the freely-coalescing surface are independent). Energy-coupled dynamics: higher heat/energy → smaller bubbles + more turbulence (many small lively turbulent bubbles at high heat; fewer, larger, calmer wax at low heat) — the lamp should feel dynamic and fun. At heat 0 the wax rests on the floor and only collision moves it (collision always on, independent of heat); at heat max many small turbulent bubbles rise/morph per second. Tuning anchor: Daniel's sweet spot is ~20% gravity / ~100% heat — calibrate defaults/ranges so that combination lands lively. Rejected: a full ping-pong FBO Navier-Stokes fluid sim — a lava lamp is high-viscosity/low-turbulence, the opposite regime; large rewrite for unwanted realism. Deliberate later upgrade only.
Color → three-color OKLab gradient with three motions. One source of truth (DeepDrftPalettes), no hardcoded hexes. Always A→B linear from the center line outward. Three combined motions: (1) anchors A/B rotate among three theme colors X/Y/Z at the rotation-speed control's rate — OKLab interpolation, never through the rainbow (the cyan fix is structural, not a tuning dial); (2) per-bar sinusoidal variation baked at segment entry and fixed as the segment scrolls — realized by keying the sinusoid to mix-time so it travels with the segment by construction (decided 2026-06-16; the explicit ring-buffer alternative is rejected for maintainability); (3) per-bar gradient curve shifts with scroll height (mostly A at bottom → mostly B at top). The static noise/frost texture is removed (Daniel: makes the screen look dirty).
Controls → seven knobs in an inline collapse/expand knob-bar. Replaces the four: (1) waveform scroll speed [replaces resolution/zoom as a standalone control], (2) gradient rotation speed, (3) lava gravity, (4) lava heat, (5) blob density/size, (6) collision strength (soft mush→hard up-and-out throw), (7) waveform width [added in the Wave R2 eval — narrows the waveform band so the lava fluid has more room to move on loud/busy songs; scales the waveform's amplitude→width mapping and its collision boundary]. NOT a popover or drawer — an in-flow controls container BETWEEN the back link (left) and the lava-lamp toggle (right) on the detail top row (redesigned 2026-06-16, superseding the first realization). The first implementation read "inline collapse/expand" as an position:absolute bar floating under the lamp (.mix-visualizer-controls-anchor) — it clipped to a vertical sliver and read as a detached popover; Daniel rejected it. The redesign: ReleaseDetailScaffold gains a new optional TopRowCenter slot so the top row is back | center-controls | lamp (Track/Cut/Session supply neither → back-link-alone, reusability preserved); the seven RadialKnobs live in that center slot and expand/collapse in the layout flow (CSS width/opacity transition, container grows horizontally between back and lamp — no position:absolute, no float, no overlay, no clipping, never overlaps the masthead/hero). On narrow widths the container wraps in-flow to a second line / drops to the scaffold's TopContent band — never edge-clips. The lava-lamp icon button toggles a bound bool — no MudPopover/MudDrawer. Styled to match the NowPlaying hero aesthetic (the session-detail hero overlay — translucent dark glass, overlay-label typography, Color.Secondary). Also: overflow-clip the visualizer to the dynamic footer height (the player bar changes height minimized/expanded) so visuals stop cleanly above it; the clip line is also the lava rest line.

Plus: redraw the lava-lamp glyph. The current DDIcons.LavaLamp is rejected (Daniel: "form is shit, colors are shit"). Redraw to the classic 1970s silhouette — a wide truncated-cone metal base, a bulbous→roundedly-pointed teardrop glass body, a small cone cap ("offset cones") — with navy fluid + moss blobs (the theme's blue+green, faithful to the reference and on-theme) and a neutral/metallic base+cap. Authored in DeepDrftShared.Client/Common/DDIcons.cs as inner SVG markup (no <svg> wrapper; 24×24 viewBox); body silhouette currentColor, the two accent fills are commented literals traced to their DeepDrftPalettes source (SVG cannot resolve var()).

Heat→intensity and collision soft↔hard transfer functions are staff-engineer tuning tasks (endpoints fixed in the spec — heat 0 = wax rests on floor / heat max = many small turbulent rising bubbles; collision soft = gentle mush / hard = high-elasticity up-and-out throw, wide range, smooth/no jitter — formulas not). Full design, the wax-blob model, the collision model, the three-motion color model, the inline knob-bar, the icon redraw, observable acceptance criteria, and phasing: product-notes/phase-10-mix-visualizer-lava-reframe.md.

Open / undecided (spec §10): (a) pause behavior — whether the lava keeps convecting while audio is paused (lamp "always on") vs. the current freeze-on-pause (rAF gated on isPlaying) is an undecided Daniel call; default to freeze-on-pause until decided, switching is a localized gating change, not a model change. (b) Future enhancement (deferred, NOT in R1–R4 scope): a per-control "auto-modulate" checkbox that slowly oscillates each knob's value via a low-frequency oscillator so the visualizer drifts on its own — Daniel flagged it as a cool future idea; the knob-bar layout leaves room but nothing builds it now.

Sequenced as four reframe waves. Wave R1 → Wave R2 → (Wave R3 ‖ Wave R4). Wave R1 (de-noise + dynamic footer clip + icon redraw) is a cheap unblock for a clean substrate. Wave R2 (wax-blob physics + 2D collision) is the load-bearing prerequisite — prove the lava before the color and the UI. Wave R3 (OKLab three-color gradient, the three motions) and Wave R4 (seven controls — including the new waveform-width knob — + NowPlaying-styled inline knob-bar + widened state to seven properties + extended bridge handle) both depend on Wave R2 but are independent of each other. Both prior open Daniel calls are now decided: controls-UI is an inline collapse/expand knob-bar (not popover/drawer); per-segment color is mix-time-keyed.

Phase 10 — Mix detail Hero + MetaContent overlay (presentation only)

A presentation pass over the Mix detail Hero + MetaContent that mirrors the already-shipped Session detail hero-overlay composition: the cover art becomes a background image with all metadata overlaid on top of a max-medium square cover-art region, replacing the stacked masthead + 220px cover + meta-divider block. Consolidates the view, frees more canvas for the lava-lamp visualizer, and brings Mix into the same design family as Sessions. No renderer/state/bridge change; the Phase 10 reframe top row (TopRowCenter controls + lava-lamp TopRightAction) is preserved unchanged — this touches only the region below it.

DRY recommendation (load-bearing, open for Daniel): extract a shared ReleaseHeroOverlay presentational component (lifted from Sessions' current inline hero) that both pages consume — one source of truth for the overlay, divergence (Mix's visualizer backdrop, the square-medium aspect vs. Sessions' wide hero) riding parameters + a CSS class, per the standing "one source, multiple views" preference. Cost: edits the shipped Sessions page (regression surface — mitigated by a behavior-preserving lift + before/after visual check). Fallback: per-page copy in Mix (fast, zero Sessions risk, takes on duplication debt — recommended only if Sessions is considered too load-bearing to touch). Plain-<div> overlay shell, no MudCard/MudPaper layout wrapper; ::deep required on every class landing on a Mud child's native output.

Full design, the three DRY directions with trade-offs, the square/medium sizing, how the Phase 10 layout is preserved, acceptance criteria, and the open questions for Daniel: product-notes/mix-detail-hero-overlay.md.

Phase 11 — Public Site Enhancements

The next pass over the public listening surface, after Phase 9 + Wave 8 moved the site to release-cardinal browse (/archive) and per-medium detail. The spine of the phase: make the release the cardinal unit of the public site, make every navigation an addressable shareable URL, and make the album a first-class playable object (ordered, queue-able, shareable). Nine Daniel commitments (the original four, plus four added 2026-06-15 when he resolved the open questions and expanded scope, plus a ninth added 2026-06-16): (1) a Cuts detail page /cuts/{id}; (2) the player-bar release-title resolves medium → dedicated detail page; (3) retire the whole track-cardinal stack and normalize release-card rendering into shared components; (4) encode Archive filters in the URL; (5) explicit track ordinal editable from the CMS; (6) release-level Share; (7) a play-queue system (absorbs the queue half of §1.3); (8) a release Description field — multiline free-text on the base release (all media), edited from the CMS add/edit forms and rendered as a text block on every detail page; (9) release GUID identifiers — front the release's transparent sequential int PK with an opaque app-minted GUID handle (the track-EntryKey model), swept across every public addressing site. Full design, framing corrections, wave decomposition, gap analysis: product-notes/phase-11-public-site-enhancements.md.

State it inherits (verified 2026-06-15). /sessions/{id} and /mixes/{id} detail pages exist and are mature (both inherit ReleaseDetailBase's prerender bridge; MixDetail composes ReleaseDetailScaffold, SessionDetail deliberately diverges). /archive is already a release-cardinal searchable browser (search + medium + genre). ReleaseGallery is the shared release-card grid — but only Sessions/Mixes use it; Archive and Cuts re-implement equivalent card markup inline. The real gaps: Cuts have no single-release detail page (/cuts cards open /tracks?album={title}), and /archive holds its filters in component fields, not the URL. The queue/playlist does not exist (single-slot player).

Headline correction — commitment 5 is already built. The brief framed the track ordinal as a new column + EF migration + a Daniel-gated apply step. The read shows it already shipped in Phase 8: TrackEntity.TrackNumber (1-based, non-null), migration 20260611005700 already applied, TrackDto mirror, API write path (validated > 0), CMS reorder (BatchEdit assigns ordinal from list position on submit), and the read already .OrderBy(t => t.TrackNumber). No new schema, no migration to gate. Commitment 5 collapses to verify-and-consume: confirm the public read projects/sorts TrackNumber and that CutDetailViewModel orders by it (a one-line fix if not). See spec §3a.

Mirror-image on commitment 8 — the Description column is genuinely new. Where commitment 5 turned out already-built, commitment 8 is the opposite: no Description member exists on ReleaseEntity or ReleaseDto (greps return nothing; the entity carries Title/Artist/Genre/ReleaseDate/ImagePath/ReleaseType/Medium + the two metadata satellites). So commitment 8 is the real cross-stack schema project — just for a different field: a new base-ReleaseEntity.Description column + EF migration (Daniel-gated apply), ReleaseDto mirror, TrackConverter round-trip, write-path plumbing (UpdateTrackMetadataRequest + upload form + the unified services — threaded wherever Genre is, since there is no dedicated release-update endpoint; release-cardinal fields ride the track update/upload path), the CMS AlbumHeaderFields multiline input, and the detail-page text block. It is a base field (uniform across media) so it lives on the base release, not a per-medium satellite (Phase 9 spine). See spec §3d.

Framing corrections (brief vocabulary vs. live routes). (1) There is no /tracks/{id} route — the track-cardinal detail is /track/{EntryKey}. The brief's "/tracks/{id} becomes a router" is best realized as a medium→route resolver at click sites (the player bar already carries release id + medium — no round-trip), plus a thin /tracks/{id} redirect page for deep links. (2) The new /cuts/{id} album page is the phase's center of gravity — the first multi-track release detail. (3) Requirement 4 is a URL-binding pass over the existing ArchiveView, borrowing the TracksView [SupplyParameterFromQuery] pattern — not a new browser.

Design discipline. The medium→route resolver is one table (ReleaseRoutes.DetailHref) consumed by the player bar, Archive, and Cuts cards. The shared ReleaseGallery becomes the one release-card grid across all four browse surfaces (Archive/Cuts fold in via a new per-card HrefResolver), not three inline copies (memory One source, multiple views). The /cuts/{id} page composes ReleaseDetailScaffold via a generalized Header slot + a BodyContent slot for the track list — not a boolean layout flag (Phase 9 §5.3). The queue is a separate IQueueService orchestrating above the single-slot player (strong steer; final call staff-engineer's). Header Play binds to a single handler that swaps single-track → QueueService.PlayRelease with no page change (memory Design for adaptability up front).

Sequenced as eight waves; the critical path is 11.A → 11.B → 11.C → 11.H, with 11.D / 11.E / 11.F / 11.G hanging off the front and 11.H sitting at the tail (it re-types the public addressing surface that 11.B–11.E build on).

11.A — /cuts/{id} album-detail page. Left header (name, artist, genre, year, Play + Share), right cover with theme border, ordered track list (by TrackNumber) with per-row play, header Play. New CutDetailViewModel; reuses GetById + the releaseId-filtered track page (both exist). Ordinal is a verification (§3a), not a dependency. Header/row Play consume 11.F when present, else degrade to single-track (§3.4 seam). Load-bearing prerequisite for 11.B's Cut resolution.
11.B — ReleaseRoutes resolver + repoint. Promote ArchiveView.DetailHref to a shared ReleaseRoutes.DetailHref; Cut resolves to /cuts/{id} (needs 11.A); repoint player-bar title (→ release), Archive cards, AlbumsView cards; thin /tracks/{id} redirect page. Depends on 11.A.
11.C — retire + normalize (the heart). With §2 removing every inbound link: delete the whole track-cardinal stack (TracksView/TrackDetail/TrackCard/TracksGallery/GalleryViewMode + /tracks, /track/{EntryKey} routes) and fold Archive + Cuts inline cards into the shared ReleaseGallery (new HrefResolver); consolidate the medium-label lookup. Depends on 11.B. (Cut track-row is a separate small TrackRow, not ReleaseGallery.)
11.D — Archive filters in the URL. /archive?q=&medium=&genre=, history-driven (§5). Touches only ArchiveView. Free-floating — but coordinate with 11.C (both edit ArchiveView).
11.E — release-level Share. SharePopover gains a release mode that copies ReleaseRoutes.DetailHref(release); wire the Cut header Share to it. Depends on 11.B (resolver) + a release detail to share.
11.F — queue model. IQueueService above the single-slot player + one new player TrackEnded hook + player-bar skip controls. Free-floating, can start cold day one. Gates the Cuts "play album" affordance (11.A header Play). Preload (§1.3 half b) stays OUT — design the seam, defer the feature.
11.G — release Description schema slice. New ReleaseEntity.Description column + EF migration (Daniel-gated apply), ReleaseDto mirror, TrackConverter round-trip, write-path plumbing (UpdateTrackMetadataRequest + upload form + the unified services, threaded wherever Genre is), CMS AlbumHeaderFields multiline input (§3d). Free-floating, can start cold day one — the only gate is Daniel's migration go-ahead. The detail-page render is NOT in this wave: the Cut text block rides 11.A, the Session/Mix block is a small additive touch to those existing pages. Both degrade cleanly (null Description renders nothing), so render & schema can land in either order.
11.H — release GUID identifiers (terminal public-site wave). Front the release long PK with an app-minted GUID-string EntryKey column — the same pattern tracks use (TrackEntity.EntryKey is required string, app-minted Guid.NewGuid().ToString(), keeping the int PK private). New ReleaseEntity.EntryKey (string, unique index, minted at FindOrCreateRelease) + EF migration that backfills a GUID-string EntryKey for every existing release row at migration time (Daniel-gated apply); ReleaseDto.EntryKey; TrackConverter round-trip; re-type the public addressing surface from long to the EntryKey handle — detail routes (:long→{EntryKey}), the /tracks/{id} redirect, ReleaseRoutes.DetailHref, SharePopover.ReleaseId, the public read path, and the public release API params (GET api/release/{id} + the releaseId track-page query). Internal FKs (track→release, satellite→release), the long int PK (unused by the app), and the ApiKey-gated CMS endpoints stay on the int. Depends on 11.B (landed), 11.C, 11.D, 11.E — it sweeps the routes/resolver/share/cards those waves create or edit, so it is the last public-site wave (spec §3e.7). Gating decision (Daniel, spec §3e.5(1)) — RESOLVED (additive EntryKey, track-pattern): additive app-level GUID-string EntryKey column matching tracks; the long PK stays DB-only and unused by the app; existing rows are backfilled at migration time (not a dev reset). Daniel's rationale (2026-06-16): "long at the DB level with an app-level guid EntryKey for the releases just like tracks; PK is not used by the app; migrate the existing data to provide the entry key at migration time." The true PK retype is declined (framework fork of Cerebellum.BlazorBlocks.Models — BaseEntity.Id hardwired long — plus full FK rewrite; recorded as considered-and-declined per file convention). Still open: raw-GUID URL (recommended) vs. slug, and migration ordering after 11.G's snapshot.

Landed: 11.A (2026-06-16); 11.F (2026-06-16); 11.G (2026-06-16); 11.B (2026-06-16); 11.C (2026-06-16); 11.E (2026-06-16); 11.D (2026-06-16); 11.H (2026-06-16). The §3.4 PlayAlbum→IQueueService seam (deferred in 11.A, awaiting 11.F) is now closed: CutDetail.razor consumes the cascaded IQueueService — header Play calls Queue.PlayRelease(ViewModel.Tracks, 0), per-row play calls Queue.PlayRelease(ViewModel.Tracks, index), currently-playing row toggles play/pause, null-safe fallback to SelectTrackStreaming when the queue cascade is absent (2026-06-16). All Phase 11 tracks (11.A–11.H) are now landed; Phase 11 is complete. Two release-table migrations are authored but not yet applied (Daniel-gated, apply in author order): 20260616035252_AddReleaseDescription (11.G) then 20260616210143_AddReleaseEntryKey (11.H).

Dependency shape: 11.A → 11.B → 11.C → 11.H; 11.B → 11.E; 11.D, 11.F, 11.G parallel (11.D coordinates with 11.C on ArchiveView; 11.F's "play album" is consumed by 11.A; 11.G's Description render rides 11.A + a Session/Mix touch, degrading on null). 11.H is terminal — it re-types the public release-addressing surface (routes, ReleaseRoutes, SharePopover, cards, public API params) that 11.B–11.E create/edit, so it follows all of them; its migration is authored after 11.G's so the EF snapshot stays linear. The cold-start items are 11.A, 11.F, and 11.G — kick 11.A + 11.F off first so "play album" works on first ship of the Cut page; 11.G runs alongside on its own track; 11.H waits for the addressing surface to settle.

Resolved by Daniel (2026-06-15), kept visible per file convention: player-bar title → release detail (was OQ1); track ordinal in scope and already built (was OQ4, reversed then found done); retire the whole track-cardinal stack (was OQ5, full cut chosen); release-level Share in scope; play-queue in scope (queue half of §1.3 absorbed; preload half stays deferred); release Description field in scope (commitment 8 — a real new column, lands as schema slice 11.G with the render on 11.A + a Session/Mix touch). Still open (spec §7.2): /cuts/{id} scaffold strategy (generalized Header slot — recommended — vs. bespoke); Cut header affordance idiom (icon vs. labeled buttons); queue architecture (separate IQueueService — strong steer; staff-engineer's final call); whether release-share keeps "Embed player" (recommend copy-link-only); Description render plain-text vs. markdown (recommend plain text + preserved line breaks for v1) and column max-length (recommend 2000–4000); /genres fate (out of scope, flag as adjacent).

Working with this file

Add items by extending an existing phase first; only create a new phase when the addition genuinely doesn't fit any of 1–5. Phase numbers are organisational, not sequencing.
When something lands, move it to COMPLETED.md rather than deleting it. Keep the original "What / Why / Shape" body intact so the history reads as a record of the decision, not just the outcome.
Mark genuinely uncertain items [speculative] so future readers can tell what is direction vs. commitment.
Open questions belong in the item that raises them, not in a separate "questions" list — they expire when the item does.

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