docs(phase-15): record visualizer controls landing

Move Phase 15 from PLAN to COMPLETED; fix DDIcons location to
DeepDrftShared.Client/Common; update WaveformVisualizerControls/Popover/State
descriptions for the three-row modal-overlay rework.

CLAUDE.md

@@ -80,7 +80,7 @@ Keep this seam clean — it is the most architecturally load-bearing part of the
 - Dark mode toggles via cookie (`darkMode`, 365 days). Client-side via JS interop.
 - During server prerender, `DarkModeService` (in `DeepDrftPublic`) reads the cookie and seeds `DarkModeSettings.IsDarkMode`, which carries into WASM render via `PersistentComponentState`. Avoids "wrong theme flash" on initial paint.
 - `DarkModeSettings` lives in `DeepDrftPublic.Client.Common` (consumed by both server prerender and client components).
-- Typography: Google Fonts (Bodoni Moda, Cormorant, DM Sans). Hand-rolled gas-lamp icon (lit/unlit) lives in `DDIcons.cs`.
+- Typography: Google Fonts (Bodoni Moda, Cormorant, DM Sans). Hand-rolled gas-lamp icon (lit/unlit) lives in `DeepDrftShared.Client/Common/DDIcons.cs`.
 
 ### TypeScript interop, not raw JS
 

COMPLETED.md

@@ -6,6 +6,25 @@ Newest entries at the top. Group by phase/wave header (mirroring `PLAN.md` / `CM
 
 ---
 
+## Phase 15 — Visualizer Controls Enhancements (landed 2026-06-17)
+
+**Landed:** 2026-06-17 on dev.
+
+- **What:** A presentation and interaction rework of the waveform visualizer control surface — the eight-RadialKnob panel (Phase 12) hosted by `WaveformVisualizerControlPopover`. Not a renderer change: the WebGL2 visualizer, the eight continuous dial values + their defaults, and the `Changed`-event bridge seam are unchanged. The phase reworks how the controls are reached and presented, adds two on/off toggles (lava, waveform), and gives the panel a deterministic, sectioned layout that encodes the visualizer's composition (lava field + waveform ribbon, optionally overlaid).
+
+  Four tracks shipped as a single bundled PR (`15.A → {15.B, 15.C} → 15.D`):
+
+  - **15.A — State booleans + bridge wiring.** Two new `WaveformVisualizerControlState` booleans: `LavaEnabled` and `WaveformEnabled` (both default `true`). `WaveformVisualizer.ts` gained a genuine per-subsystem draw-skip: when a subsystem is "off" it is not drawn, contributes no collisions, and incurs no render cost (not dimmed). The bridge pushes the new booleans on `Changed` alongside the eight existing dials. The per-subsystem draw-skip seam was built as part of this track (it did not exist prior).
+  - **15.B — Screen-centered tinted-modal primitive + NowPlayingCard chrome.** `WaveformVisualizerControlPopover` changed from an anchored `MudPopover` to a screen-centered, tinted modal `MudOverlay` (`DarkBackground`, `Modal="true"`). The `AnchorOrigin`/`TransformOrigin` parameters were dropped — a centered modal has no anchor. Panel chrome follows the NowPlayingCard look: square corners, lighter-navy ground, thin light border. Chrome classes stay in the global `deepdrft-styles.css` (CSS isolation cannot reach portaled overlay content). Tint opacity resolves from a single `--deepdrft-modal-scrim-alpha` token. Knob-drag safety is preserved: `RadialKnob` mounts its own `position:fixed` capture div above the scrim while dragging, so releasing outside the panel does not close the modal.
+  - **15.C — Deterministic three-row layout + toggles + scroll slider.** The flat eight-knob grid replaced by a three-row sectioned layout: **Row 1 (MODE, always visible):** two lamp toggles (lava / waveform) left-aligned + collisions knob (only when both subsystems on) + color knob pinned far-right. **Row 2 (LAVA, visible only when lava on):** "LAVA:" label + Gravity / Heat / FluidAmount / FluidViscosity knobs. **Row 3 (WAVE, visible only when waveform on):** "WAVE:" label + scroll/zoom `MudSlider` (bound to `ScrollSpeed` alone) + width knob pinned far-right. The lamp toggles use the `DDIcons.LavaLamp` / `DDIcons.LavaLampFilled` glyph (lit = on, unlit = off) and are green (`Color.Primary`) because they are interactive.
+  - **15.D — Tooltips + light icon colour.** Each control received a playful, non-technical `MudTooltip`. Knob caption icons and section labels changed to light (`Color.Default` / CSS light token) per the resolved colour principle: green = interactive elements (toggles, knob arcs/pointers, scroll slider); light = static/decorative elements (section labels, caption icons).
+
+- **Why:** The eight-knob flat grid gave the user no signal about which knobs drive the lava vs. the waveform, and neither subsystem could be turned off independently. The new layout sections controls by subsystem, making "lava only" / "waveform only" first-class operating modes. The screen-centering solves the anchored-popover problem: `MudPopover` positions off its trigger's bounding rect — wrong for a control panel that should read as centered regardless of where the lava-lamp icon sits (Mix corner, Cut/Session ambient, NowPlaying corner).
+
+- **Shape:** `DeepDrftPublic.Client/Controls/WaveformVisualizerControls.razor` — three-row layout replacing the flat eight-knob grid; two `ToggleLava`/`ToggleWaveform` handlers; conditional row visibility; `MudSlider` for scroll speed. `DeepDrftPublic.Client/Controls/WaveformVisualizerControlPopover.razor` — `MudPopover` replaced by `MudOverlay` (centered, `DarkBackground`, `Modal`); `AnchorOrigin`/`TransformOrigin` parameters removed. `DeepDrftPublic.Client/Services/WaveformVisualizerControlState.cs` — two new boolean properties (`LavaEnabled`, `WaveformEnabled`) and matching `DefaultLavaEnabled`/`DefaultWaveformEnabled` consts (both `true`). `DeepDrftPublic/Interop/visualizer/WaveformVisualizer.ts` — per-subsystem draw-skip seam (lava physics + blob uploads skipped when lava off; ribbon SDF + collision boundary dropped when waveform off). `DeepDrftPublic/wwwroot/styles/deepdrft-styles.css` — `--deepdrft-modal-scrim-alpha` token; `.waveform-visualizer-control-overlay` centering; `.waveform-visualizer-control-modal` panel chrome (square corners, lighter-navy, thin border); row/section layout classes (`wvc-row`, `wvc-row-mode`, `wvc-row-section`, `wvc-row-wave`, `wvc-section-label`, `wvc-toggle`, `wvc-slider`). Full design, layout contract, primitive rationale, tooltip copy, and acceptance: `product-notes/phase-15-visualizer-controls-enhancements.md`.
+
+---
+
 ## Phase 14 — CMS Releases Consolidation (landed 2026-06-17)
 
 **Landed:** 2026-06-17 on dev.

DeepDrftPublic.Client/CLAUDE.md

@@ -25,8 +25,8 @@ All interactive UI for the site. Blazor WebAssembly. Pages, controls, the stream
   - `SpectrumVisualizer.razor`: Bar-graph spectrum display, driven by `getSpectrumData` JS callback.
   - `ReleaseHeroOverlay.razor`: Shared presentational overlay shell consumed by both `SessionDetail` and `MixDetail`. Renders a background-image hero region with genre/date/share overlaid at the top and title/artist/play at the bottom. Parameters: `HeroImageKey`, `PlaceholderIcon`, `CoverThumbKey` (optional cover thumb in bottom row), `Title`, `Artist`, `Genre`, `ReleaseDate`, `ShareContent` (slot), `PlayContent` (slot), `Class` (per-page aspect/sizing override). Owns no player logic or data fetch; each consuming page passes its own play and share slots. Overlay shell is plain `<div>`s; background-image surface is a `<div class="release-hero-img">` (no `MudPaper`).
   - `WaveformVisualizer.razor`: The single WebGL2 lava-lamp visualizer engine. Hosts the waveform of whatever track is currently playing/selected. Three hosting modes: mode A (Mix detail — full-bleed centerpiece), mode B (Cut/Session detail — ambient layer behind hero+content via `ReleaseDetailScaffold`'s `Ambient` slot), mode C (NowPlaying hero panel — full-bleed background for the home hero's right side, mounted by `NowPlaying.razor` inside `.np-visualizer-bg`). `[Parameter] bool Fill` switches from fixed-viewport positioning to container-relative sizing (CSS-only; the renderer is identical in both modes). The bridge resolves the current track's `EntryKey` and re-fetches the high-res datum on track change. Subscribes to `WaveformVisualizerControlState.Changed` and pushes each updated dial to the WebGL module via JS interop. Follows the live playing track (keys on host `TrackId` match OR shared host `ReleaseEntryKey`).
-  - `WaveformVisualizerControls.razor`: Eight-knob RadialKnob control panel (the panel content hosted by `WaveformVisualizerControlPopover`). Controls (in order): waveform scroll speed, color gradient rotation speed, lava gravity, lava heat, fluid amount, fluid viscosity (cohesion), collision strength, waveform width. `[Parameter] bool PanelChrome` scopes panel chrome (title bar, background) to the popover mount — set `true` when placed in a popover, `false` when embedded directly. Owns no JS interop: mutates the injected `WaveformVisualizerControlState` and raises `Changed`. No control is a seek surface (read-only contract).
+  - `WaveformVisualizerControls.razor`: The waveform visualizer control panel (content hosted by `WaveformVisualizerControlPopover`). Phase 15 re-layout: a deterministic **three-row sectioned layout** encoding the visualizer's two subsystems. Row 1 (MODE, always visible): two iconographic lamp toggles (lava on/off, waveform on/off) left-aligned + collisions knob (conditional — only when both subsystems on) + color knob pinned far-right. Row 2 (LAVA, visible only when `LavaEnabled`): "LAVA:" section label + Gravity / Heat / FluidAmount / FluidViscosity knobs. Row 3 (WAVE, visible only when `WaveformEnabled`): "WAVE:" section label + scroll-speed `MudSlider` (not a knob) + width knob pinned far-right. Total: two lamp toggles, seven `RadialKnob`s, one `MudSlider`. Colour principle: lamp toggles / knob arcs / slider are green (`Color.Primary` — interactive); section labels / knob caption icons are light (static). Each control has a playful `MudTooltip`. `[Parameter] bool PanelChrome` scopes panel chrome (NowPlayingCard look — square corners, lighter-navy, thin border) to the popover mount; chrome classes live in the global `deepdrft-styles.css` (CSS isolation cannot reach portaled overlay content). `[Parameter] bool Visible` gates the rows via `@if` while the container holds reserved min-height. Owns no JS interop: mutates the injected `WaveformVisualizerControlState` and raises `Changed`. No control is a seek surface (read-only contract).
-  - `WaveformVisualizerControlPopover.razor`: Pairs the lava-lamp icon button with `WaveformVisualizerControls` as `MudPopover` overlay content. This is the unit every host places — one icon anywhere gives the full eight-knob panel on demand. Styled to the NowPlaying Hero look from `deepdrft-tokens.css` (no hardcoded hex). Placed identically on Mix, Cut, Session, and the NowPlaying hero panel (full parity; in NowPlaying it sits in `.np-visualizer-controls` at the panel's top-right corner, not inside `NowPlayingCard`).
+  - `WaveformVisualizerControlPopover.razor`: Pairs the lava-lamp icon button with `WaveformVisualizerControls` as a **screen-centered tinted modal** (Phase 15). The primitive is `MudOverlay` (`DarkBackground="true"`, `Modal="true"`) — **not** `MudPopover`; `AnchorOrigin`/`TransformOrigin` parameters do not exist (a centered modal has no anchor). Clicking the lava-lamp icon opens the overlay; clicking the scrim closes it (knob-drag-safe: `RadialKnob`'s `position:fixed` capture div sits above the scrim during a drag, so releasing outside the panel never fires the close handler). The panel stops click propagation so an inside click is not a dismissal. `[Parameter] Size IconSize` controls the trigger-icon size (default `Large`). This is the unit every host places — one icon anywhere gives the full control panel centered on screen, regardless of where the icon sits. Placed identically on Mix, Cut, Session, and the NowPlaying hero panel (full parity; in NowPlaying it sits in `.np-visualizer-controls` at the panel's top-right corner, not inside `NowPlayingCard`).
   - `WaveformZoomMapping.cs`: Maps the `WaveformVisualizerControlState.Resolution` fraction to an integer zoom level for the WebGL renderer.
   - `NowPlayingCard.razor`: Home-page text panel showing the currently playing track (label, title, sub-line). Renders label/"Now Playing" dot, track name, and artist·release sub-line from the cascaded `IStreamingPlayerService`. Subscribes to `IPlayerService.StateChanged` in `OnParametersSet` (reference-guarded, idempotent) and unsubscribes on dispose to re-render on track/state change. No visualizer or popover; those moved to `NowPlaying.razor`.
   - `NowPlaying.razor`: Owns the home hero's right-side panel (`.now-playing-panel` — the outer wrapper formerly called `.hero-right` in `Home.razor`). Mounts `<WaveformVisualizer Fill="true">` as a full-bleed background inside `.np-visualizer-bg`, `<WaveformVisualizerControlPopover>` in `.np-visualizer-controls` (top-right corner), the three pulsing `.circle-deco` rings, and the content layer (hosts `<NowPlayingCard>` + `<NowPlayingStats>`). `Home.razor`'s `MudItem` renders `<NowPlaying />` directly with no wrapper. Subscribes to `IPlayerService.StateChanged` in `OnParametersSet` (reference-guarded, idempotent) and unsubscribes on dispose — needed because the player cascade is `IsFixed` (the provider's own re-render does not reach `NowPlaying`), so the subscription is the only way to re-render and re-propagate `ReleaseEntryKey`/`TrackId`/`TrackEntryKey` into `<WaveformVisualizer>` when the playing track changes.
@@ -39,7 +39,7 @@ All interactive UI for the site. Blazor WebAssembly. Pages, controls, the stream
   - `StreamingAudioPlayerService`: Production implementation. Chunked stream from `TrackMediaClient`, adaptive 16–64 KB buffer, early-playback, **seek-beyond-buffer** via offset request to the content API.
   - `AudioInteropService`: JS interop wrapper over `window.DeepDrftAudio`. Manages `DotNetObjectReference` lifetimes for progress, end-of-playback, spectrum callbacks.
   - Dark-mode services: `DarkModeServiceBase` (cookie name constant), `DarkModeCookieService` (JS cookie read/write).
-  - `WaveformVisualizerControlState`: Scoped session-persistent holder for the visualizer's **eight** control positions: `ScrollSpeed`, `GradientRotationSpeed`, `LavaGravity`, `LavaHeat`, `FluidAmount` (wax count/volume), `FluidViscosity` (cohesion — the second half of the Phase 10 "bubbles" split; `BlobDensity` is gone), `CollisionStrength`, `WaveformWidth`. Each has a matching `Default*` const. `Changed` event is the decoupling seam — controls mutate state + raise `Changed`; the bridge (`WaveformVisualizer`) subscribes and pushes the affected uniform. Scoped DI so state survives SPA nav within a session and resets on fresh page load.
+  - `WaveformVisualizerControlState`: Scoped session-persistent holder for the visualizer's **eight** continuous control positions plus **two subsystem on/off toggles** (Phase 15): `ScrollSpeed`, `GradientRotationSpeed`, `LavaGravity`, `LavaHeat`, `FluidAmount` (wax count/volume), `FluidViscosity` (cohesion — the second half of the Phase 10 "bubbles" split; `BlobDensity` is gone), `CollisionStrength`, `WaveformWidth`, `LavaEnabled` (bool, default `true`), `WaveformEnabled` (bool, default `true`). Each has a matching `Default*` const. `Changed` event is the decoupling seam — controls mutate state + raise `Changed`; the bridge (`WaveformVisualizer`) subscribes and pushes the affected uniform or subsystem-enable. Scoped DI so state survives SPA nav within a session and resets on fresh page load.
 - `Clients/`: HTTP API clients (both target DeepDrftAPI).
   - `TrackClient`: SQL metadata API. Uses named `IHttpClientFactory` client `"DeepDrft.API"`. Sends `page` param (not `pageNumber`). Deserializes response as bare `PagedResult<TrackDto>` (not wrapped in ApiResultDto envelope).
   - `TrackMediaClient`: Content API. Uses named `IHttpClientFactory` client `"DeepDrft.Content"`. Methods like `GetAudioStreamAsync(trackId, byteOffset?)` → `Stream` with optional Range header support for seek-beyond-buffer.
@@ -49,7 +49,7 @@ All interactive UI for the site. Blazor WebAssembly. Pages, controls, the stream
   - `TrackDetailViewModel`: Scoped. Holds loaded track, loading flag, not-found flag. `Load(entryKey)` fetches via `ITrackDataService` and resets all flags per call (prevents cross-navigation bleed). Registered in `Startup.ConfigureDomainServices`.
 - `Common/`: Shared utilities.
   - `DarkModeSettings.cs`: `[PersistentState]`-annotated class (single source of truth for dark mode in the client). Registered scoped.
-  - `DDIcons.cs`: Hand-rolled SVG icons (gas-lamp lit/unlit for dark mode toggle).
+  - `ReleaseRoutes.cs`: Static helper. `DetailHref(long id, ReleaseMedium)` returns the canonical public detail route for a release; consumed by Archive, AlbumsView, player bar, and TrackRedirect (11.B).
 - `Program.cs`: WASM entry point. Calls `Startup.ConfigureApiHttpClient`, `ConfigureContentServices`, `ConfigureDomainServices`.
 - `_Imports.razor`: Global using statements and component imports.
 
@@ -105,7 +105,7 @@ New modules in `DeepDrftPublic/Interop/audio/`:
 - `DarkModeServiceBase`: Holds the cookie name constant (`"darkMode"`).
 - `DarkModeCookieService`: Reads/writes the cookie via JS (`document.cookie` interop). Calls `DarkModeSettings.IsDarkMode = value` when the cookie changes or user toggles the button.
 - Server-side `DarkModeService` (in `DeepDrftPublic`, **not here**): Reads the cookie during prerender, seeds the `DarkModeSettings` instance, rounds it through `PersistentComponentState` to the client.
-- `MainLayout.razor`: Wraps entire layout in `CascadingValue` of `DarkModeSettings`, so all children see the current dark-mode state. The dark-mode toggle button (hand-rolled lit/unlit gas-lamp icon from `DDIcons.cs`) calls `DarkModeCookieService.ToggleDarkModeAsync()`.
+- `MainLayout.razor`: Wraps entire layout in `CascadingValue` of `DarkModeSettings`, so all children see the current dark-mode state. The dark-mode toggle button (hand-rolled lit/unlit gas-lamp icon from `DeepDrftShared.Client/Common/DDIcons.cs`) calls `DarkModeCookieService.ToggleDarkModeAsync()`.
 
 The flow ensures the first paint uses the correct theme (no flash), and toggling the button persists the setting to a 365-day cookie.
 
@@ -120,7 +120,7 @@ Component state lives in ViewModels (registered scoped in DI). Components render
 
 - Bespoke `PaletteLight` / `PaletteDark` defined inline in `MainLayout.razor` (MudBlazor theme objects).
 - CSS classes prefixed `deepdrft-` live in `DeepDrftPublic/wwwroot/styles/deepdrft-styles.css` (shared across server and client).
-- Custom SVG icons: `Common/DDIcons.cs` (hand-rolled gas-lamp, etc.).
+- Custom SVG icons: `DeepDrftShared.Client/Common/DDIcons.cs` (hand-rolled gas-lamp, lava-lamp, etc. — shared across public and CMS surfaces).
 
 ## Development commands
 

PLAN.md

@@ -239,28 +239,6 @@ Sequenced as **eight waves**; the critical path is `11.A → 11.B → 11.C → 1
 
 ---
 
-## Phase 15 — Visualizer Controls Enhancements
-
-A presentation + interaction rework of the **waveform visualizer control surface** — the eight-RadialKnob panel (Phase 12) hosted by `WaveformVisualizerControlPopover`. **Not** a renderer change: the WebGL2 visualizer, the eight continuous dial values + their defaults, and the `Changed`-event bridge seam are all unchanged. This phase reworks how the controls are *reached and presented*, adds **two on/off toggles** (lava, waveform), and gives the panel a **deterministic, sectioned layout** that encodes the visualizer's composition (lava field + waveform ribbon, optionally overlaid). Full design, layout contract, primitive rationale, tooltip copy, acceptance, and wave decomposition: `product-notes/phase-15-visualizer-controls-enhancements.md`.
-
-**Phase number:** 14 (releases consolidation) has now landed on dev; 15 was chosen as the next free number when this phase was drafted alongside Phase 14. See `COMPLETED.md` for the Phase 14 record.
-
-**The load-bearing reframe.** Today the eight knobs read as a flat, equal grid — the user cannot tell which knobs drive the lava vs. the waveform, and neither subsystem can be turned off. The new layout sections the controls by subsystem and the two toggles make "lava only" / "waveform only" first-class. The screen-centering and chrome are polish around that.
-
-**Daniel's five requirements (verbatim intent):** (1) panel look-and-feel follows `NowPlayingCard` — square corners, lighter navy, thin light border; (2) popover becomes **screen-centered + modal-tinted** — use the right MudBlazor overlay primitive, do not fight an anchored popover into the center; (3) deterministic three-row layout — **row 1:** lava toggle, waveform toggle, then (only if both on) collisions knob, then color knob far-right; **row 2 (lava on):** "LAVA:" + Gravity/Heat/two-Fluid knobs; **row 3 (waveform on):** "WAVE:" + scroll/zoom **slider** + width knob far-right; (4) playful, non-technical tooltip per control; (5) knob caption icons go **light**, not accent-green.
-
-**Primitive decision (spec §4): `MudOverlay` (centered, `DarkBackground` tint, modal), not `MudPopover`.** `MudPopover` is by design *anchored* to its trigger — screen-centering means fighting its positioning model (the "do not fight MudBlazor" Daniel called out). `MudOverlay` gives screen-centering + the modal tint with the smallest delta from today's idiom (we already host a `MudOverlay` for dismissal; it graduates from transparent click-catcher to tinted scrim that holds the panel). `MudDialog` is the documented fallback if `MudOverlay` centering fights the knob-drag overlay — escalate, don't hand-roll a fixed-position div. CSS-isolation constraint persists (overlay portals content out of the subtree → panel chrome stays in the **global** `deepdrft-styles.css`, not the scoped `.razor.css`).
-
-**The one renderer-adjacent touch.** The two new toggles back two new `WaveformVisualizerControlState` booleans (`LavaEnabled` / `WaveformEnabled`, both default true). The bridge (`WaveformVisualizer`) must enable/disable the corresponding subsystem in the WebGL module on `Changed` — the one place this phase reaches past pure presentation. **"Off" means fully absent** (resolved 2026-06-17): the subsystem is not drawn, contributes no collisions, incurs no render cost — not dimmed. This is a **real build**, not a flag flip: the implementer should expect the per-subsystem draw-skip seam **does not yet exist** in `WaveformVisualizer.ts` and that building it is part of 15.A (spec §6, §10.1). Budget the renderer touch as a draw-skip path, not a one-line uniform push.
-
-**Colour principle — green = interactive, light = non-interactive** (resolved 2026-06-17). One rule governs every control's colour: interactive elements (the lamp toggles, knob arcs/pointers, scroll slider) are **green-accent**; static/decorative elements (the "LAVA:" / "WAVE:" section labels, knob caption icons) are **light**. This unifies the original requirement 5 (icons light), the section-label colour, and the toggle colour into one principle — apply it uniformly, not per-control (spec §5).
-
-**Sequenced as one wave, four tracks** (small enough to ship as a single bundled PR — recommended, since the tracks are tightly coupled around one component pair and splitting would be churn): **15.A** state booleans + bridge wiring (load-bearing); **15.B** screen-centered tinted-modal primitive + NowPlayingCard chrome; **15.C** deterministic re-layout + toggles + scroll-slider; **15.D** tooltips + light icon colour. Dependency shape: `15.A → {15.B, 15.C} → 15.D`.
-
-**Open questions — all RESOLVED 2026-06-17 (spec §10, kept visible):** (1) "off" means **fully absent** (not drawn, no collisions, no render cost — not dimmed); the per-subsystem draw-skip seam is expected **not** to exist yet and building it is part of 15.A; (2) scroll/zoom binds to **`ScrollSpeed` alone**; (3) "LAVA:"/"WAVE:" labels are **light** (green is reserved for interactive elements); (4) toggles are **iconographic lamp toggles** (lit/unlit), **green** because interactive; (5) tint opacity is **mild** and resolves from a **single token/constant** (one point of change, no repeated magic number). **Post-landing doc-keeper note** (not this phase's work): root `CLAUDE.md` wrongly places `DDIcons.cs` in `DeepDrftPublic.Client.Common` — it lives in `DeepDrftShared.Client/Common`.
-
----
-
 ## 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.