docs: reflect Phase 17 Wave 17.3 landing; Phase 17 complete

COMPLETED.md

@@ -6,6 +6,24 @@ Newest entries at the top. Group by phase/wave header (mirroring `PLAN.md` / `CM
 
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+## Phase 17 — Player-Bar Queue View: Wave 17.3 — Fixed embed panel + iframe resize (landed 2026-06-19)
+
+**Landed:** 2026-06-19 on dev.
+
+- **What:** The Fixed (embed) mode queue panel and the OQ1 Option-A iframe resize handshake. Release embeds now render an always-shown, read-only queue panel below the player-bar controls; the Queue button collapses/expands that panel and posts the iframe's new height to the host page so the outer `<iframe>` element resizes to match. Single-track embeds (TrackEntryKey mode) have no queue, no panel, and no Queue button — unchanged compact behaviour. Phase 17 is now complete (all four waves landed).
+
+- **Why:** Phase 11 wave 11.F armed release embeds with a queue (skip navigation, auto-advance), but the viewer had no way to see or jump within the queue. Wave 17.3 surfaces it in Fixed mode — read-only because a shared embed is not an editable playlist — and resolves OQ1 (Option A confirmed feasible: `postMessage` resize degrades gracefully if the host strips the script).
+
+- **Shape:**
+  - **Fixed embed queue panel** (`AudioPlayerBar.razor`): rendered conditionally on `ShowFixedPanel && _fixedPanelOpen` inside `.deepdrft-queue-embed-panel`; hosts `<QueueList Items="QueueItems" CurrentIndex="QueueCurrentIndex" Editable="false" OnJump="@OnQueueJump" />`. Read-only: no drag handles, no remove buttons. Row-jump (OQ2) calls `PlayRelease(Items, index)` — coherent from the armed-but-not-started state (`PlayRelease` already clears `IsArmed` and materializes a defensive copy).
+  - **Queue button in Fixed mode** (`PlayerTransportZone`): toggles `_fixedPanelOpen`; triggers a height post after the panel renders. Gated on `ShowFixedPanel` so single-track embeds see no button.
+  - **`EmbedSnippetBuilder.cs`** (`DeepDrftPublic.Client/Helpers/EmbedSnippetBuilder.cs`): `ForRelease` now mints a per-snippet random token (8 hex chars from `Guid.NewGuid().ToString("N")[..8]`). Token is used as the iframe id (`deepdrft-embed-{token}`) and threaded into the iframe src as `&EmbedId={token}`. Taller iframe height (release: 384 px vs. track: 196 px). Carries a host-side `<script>` listener that matches incoming `{type:"deepdrft-embed-resize", embedId}` messages against the snippet's own token and sets `iframe.style.height` — multiple release embeds on one host page resize independently (no cross-talk). Degrades to Option B if the host strips the script (panel still works inside the iframe at expanded height). `ForTrack` is unchanged (compact height 196 px, no script, no id token).
+  - **`embed-frame.ts`** (`DeepDrftPublic/Interop/embed/embed-frame.ts`; compiled output gitignored): new TypeScript interop module. Reads `EmbedId` from `window.location.search` once at module load; exports `postHeight(element: HTMLElement)` — measures the player element's rendered height (`Math.ceil(getBoundingClientRect().height) + 2`), builds `{type:"deepdrft-embed-resize", height, embedId?}` payload (omits `embedId` when absent for backward-compatible degradation), and calls `window.parent.postMessage(payload, "*")`. No-ops when not framed (`window.parent === window`) or the element is unmeasurable.
+  - **CSS** (`DeepDrftPublic/wwwroot/styles/deepdrft-styles.css`): new `deepdrft-queue-embed-panel` and related `deepdrft-` embed-panel classes for the fixed queue panel chrome.
+  - **Tests** (`EmbedSnippetBuilderTests`): height divergence (ForRelease taller than ForTrack), ForTrack-unchanged (height 196, no script), id uniqueness (two ForRelease calls yield distinct ids), id/script-token consistency (iframe id matches token in script), EmbedId-in-src (token appears as `EmbedId=` in the iframe src).
+
+---
+
 ## Phase 17 — Player-Bar Queue View: Wave 17.4 — Add-to-Queue affordance (landed 2026-06-19)
 
 **Landed:** 2026-06-19 on dev.