Merge branch 'master' into worktree-mosaic-library

# Conflicts:
#	scripts/extract-traces.test.ts

src/lib/components/common/CachedImage.svelte

@@ -15,7 +15,7 @@
      * Called once the bitmap is decoded, with its intrinsic pixel size. Lets a
      * layout that sizes boxes from artwork (the mosaic) use the shape the image
      * actually has rather than the one its item type suggests.
-     * TRACES: UR-075 | DR-172
+     * TRACES: UR-075 | DR-174
      */
     onNaturalSize?: (width: number, height: number) => void;
   }

src/lib/components/library/MosaicGrid.svelte

@@ -11,7 +11,7 @@
   arrives over a few hundred milliseconds, and re-packing on each arrival would
   shuffle the grid under the viewer's cursor several times over.
 
-  TRACES: UR-075 | DR-172
+  TRACES: UR-075 | DR-174
 -->
 <script lang="ts" generics="T extends { key: string; ratio: number }">
   import type { Snippet } from "svelte";

src/lib/components/library/MosaicTile.svelte

@@ -7,7 +7,7 @@
   lines would no longer line up with its neighbours. Keeping everything inside
   the box is what lets `layoutMosaic` own the geometry completely.
 
-  TRACES: UR-075 | DR-172
+  TRACES: UR-075 | DR-174
 -->
 <script lang="ts">
   import type { Snippet } from "svelte";

src/lib/components/library/libraryMosaic.ts

@@ -9,7 +9,7 @@
 // `favoritesScope` (Rust: `SearchScope::for_collection_type`). This file only
 // decides what to *call* it and where to put it.
 //
-// TRACES: UR-075, UR-067 | DR-172, DR-173 | UT-167
+// TRACES: UR-075, UR-067 | DR-174, DR-175 | UT-167
 
 import type { Library } from "$lib/api/types";
 import {

src/lib/components/library/mosaic.ts

@@ -9,7 +9,7 @@
 //
 // Presentation only — nothing here knows what a library or a media item is.
 //
-// TRACES: UR-075 | DR-172 | UT-158, UT-159, UT-160
+// TRACES: UR-075 | DR-174 | UT-158, UT-159, UT-160
 
 /** A tile to place: an opaque key and the aspect ratio (width / height) to honour. */
 export interface MosaicInput {

src/lib/components/player/VideoPlayer.scrubRegression.test.ts

@@ -23,12 +23,12 @@ import { describe, it, expect, vi, beforeEach } from "vitest";
 // ---- Mocks (must precede component import) --------------------------------
 
 const channelHandlers: Record<string, (event: any) => void> = {};
-// These tests pin the **flag-off** interim behaviour: when `experimentalNativeVideo`
-// is off, VideoPlayer overrides Android's native backend response to HTML5
-// rendering and stops the native backend. That flag now defaults to *on*
-// (DR-160, so picture-in-picture has a real surface to shrink into), so the
-// default no longer selects this path and the tests have to say which path they
-// are guarding rather than inherit it. (DR-161)
+// These tests pin the **flag-off** behaviour: when `experimentalNativeVideo` is
+// off, VideoPlayer overrides Android's native backend response to HTML5
+// rendering and stops the native backend. That is the default again (DR-172,
+// after native video shipped as audio with no picture), so this mock now agrees
+// with the default rather than opposing it — kept explicit so the tests state
+// which path they guard instead of inheriting whatever the default happens to be.
 vi.mock("$lib/stores/nativeVideo", async (importOriginal) => {
   const actual = await importOriginal<typeof import("$lib/stores/nativeVideo")>();
   return {

src/lib/components/player/VideoPlayer.touchScrub.test.ts

@@ -26,12 +26,12 @@ import { describe, it, expect, vi, beforeEach } from "vitest";
 // ---- Mocks (must precede component import) --------------------------------
 
 const channelHandlers: Record<string, (event: any) => void> = {};
-// These tests pin the **flag-off** interim behaviour: when `experimentalNativeVideo`
-// is off, VideoPlayer overrides Android's native backend response to HTML5
-// rendering and stops the native backend. That flag now defaults to *on*
-// (DR-160, so picture-in-picture has a real surface to shrink into), so the
-// default no longer selects this path and the tests have to say which path they
-// are guarding rather than inherit it. (DR-161)
+// These tests pin the **flag-off** behaviour: when `experimentalNativeVideo` is
+// off, VideoPlayer overrides Android's native backend response to HTML5
+// rendering and stops the native backend. That is the default again (DR-172,
+// after native video shipped as audio with no picture), so this mock now agrees
+// with the default rather than opposing it — kept explicit so the tests state
+// which path they guard instead of inheriting whatever the default happens to be.
 vi.mock("$lib/stores/nativeVideo", async (importOriginal) => {
   const actual = await importOriginal<typeof import("$lib/stores/nativeVideo")>();
   return {