feat(search): rank results by match quality and split TV/People groups

Neither search backend orders by *where* the query matched, so a mid-word hit
could outrank a prefix one — typing "parks" surfaced "Sparks of Love" above
"Parks and Recreation".

Add `domain/search_rank.rs`, which sorts by match position (prefix →
word-start → mid-word substring → no name match), then by media kind so a
container outranks its own contents. The sort is stable, so each backend's own
relevance still breaks ties it was never overruled on. `repository_search`
applies it to both the instant cache result and the merged cache+server union,
so the list does not reshuffle when server results land. Ranking lives in Rust
because "a better match" is domain vocabulary, not presentation.

On the frontend, the combined `tvShows` result group splits into separate
Shows and Episodes groups so a show no longer competes with its own episodes
for a slot, and a People group is added so searching an actor's name reaches
their bio. A stored `tvShows` order expands in place, keeping the position an
upgrading user chose for it.

src/lib/components/search/SearchResults.svelte

@@ -53,7 +53,7 @@
               <MediaCard
                 {item}
                 size="medium"
-                showProgress={group.id !== "artists"}
+                showProgress={group.id !== "artists" && group.id !== "people"}
                 onclick={() => onItemClick?.(item)}
               />
             {/each}

src/lib/stores/searchGroupOrder.test.ts

@@ -42,15 +42,33 @@ describe("searchGroupOrder", () => {
   it("loads a stored order", async () => {
     localStorage.setItem(
       STORAGE_KEY,
-      JSON.stringify(["tvShows", "movies", "songs", "albums", "artists"])
+      JSON.stringify(["episodes", "shows", "movies", "songs", "albums", "artists", "people"])
     );
     const { searchGroupOrder } = await import("./searchGroupOrder");
     expect(get(searchGroupOrder)).toEqual([
-      "tvShows",
+      "episodes",
+      "shows",
       "movies",
       "songs",
       "albums",
       "artists",
+      "people",
+    ]);
+  });
+
+  it("migrates a stored `tvShows` from before the group split", async () => {
+    // Upgrading must keep the user's placement of TV, not append the two new
+    // groups at the bottom.
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(["tvShows", "movies"]));
+    const { searchGroupOrder } = await import("./searchGroupOrder");
+    expect(get(searchGroupOrder)).toEqual([
+      "shows",
+      "episodes",
+      "movies",
+      "songs",
+      "albums",
+      "artists",
+      "people",
     ]);
   });
 
@@ -59,10 +77,12 @@ describe("searchGroupOrder", () => {
     const { searchGroupOrder } = await import("./searchGroupOrder");
     expect(get(searchGroupOrder)).toEqual([
       "movies",
+      "shows",
+      "episodes",
       "songs",
       "albums",
       "artists",
-      "tvShows",
+      "people",
     ]);
   });
 
@@ -74,50 +94,45 @@ describe("searchGroupOrder", () => {
 
   it("persists a move so the order survives a restart", async () => {
     const { searchGroupOrder } = await import("./searchGroupOrder");
+    // Default is shows, episodes, movies, songs, … — move movies up one.
     searchGroupOrder.move("movies", -1);
 
-    expect(get(searchGroupOrder)).toEqual([
+    const expected = [
+      "shows",
+      "movies",
+      "episodes",
       "songs",
       "albums",
-      "movies",
       "artists",
-      "tvShows",
-    ]);
-    expect(JSON.parse(localStorage.getItem(STORAGE_KEY)!)).toEqual([
-      "songs",
-      "albums",
-      "movies",
-      "artists",
-      "tvShows",
-    ]);
+      "people",
+    ];
+    expect(get(searchGroupOrder)).toEqual(expected);
+    expect(JSON.parse(localStorage.getItem(STORAGE_KEY)!)).toEqual(expected);
 
     // Simulate a fresh app start reading the same storage.
     vi.resetModules();
     const reloaded = await import("./searchGroupOrder");
-    expect(get(reloaded.searchGroupOrder)).toEqual([
-      "songs",
-      "albums",
-      "movies",
-      "artists",
-      "tvShows",
-    ]);
+    expect(get(reloaded.searchGroupOrder)).toEqual(expected);
   });
 
   it("persists a drag reorder", async () => {
     const { searchGroupOrder } = await import("./searchGroupOrder");
+    // Drag "albums" (index 4) to the front.
     searchGroupOrder.reorder(4, 0);
     expect(get(searchGroupOrder)).toEqual([
-      "tvShows",
-      "songs",
       "albums",
-      "artists",
+      "shows",
+      "episodes",
       "movies",
+      "songs",
+      "artists",
+      "people",
     ]);
   });
 
   it("resets to the shipped default", async () => {
     const { searchGroupOrder } = await import("./searchGroupOrder");
-    searchGroupOrder.move("tvShows", -1);
+    searchGroupOrder.move("movies", -1);
     searchGroupOrder.reset();
     expect(get(searchGroupOrder)).toEqual([...DEFAULT_GROUP_ORDER]);
   });
@@ -127,10 +142,12 @@ describe("searchGroupOrder", () => {
     searchGroupOrder.set(["movies", "podcasts"] as never);
     expect(get(searchGroupOrder)).toEqual([
       "movies",
+      "shows",
+      "episodes",
       "songs",
       "albums",
       "artists",
-      "tvShows",
+      "people",
     ]);
   });
 });

src/lib/utils/searchScope.test.ts

@@ -92,9 +92,11 @@ describe("normalizeGroupOrder", () => {
     expect(normalizeGroupOrder(["movies", "podcasts", "songs"])).toEqual([
       "movies",
       "songs",
+      "shows",
+      "episodes",
       "albums",
       "artists",
-      "tvShows",
+      "people",
     ]);
   });
 
@@ -103,9 +105,11 @@ describe("normalizeGroupOrder", () => {
     expect(normalizeGroupOrder(["movies", "songs"])).toEqual([
       "movies",
       "songs",
+      "shows",
+      "episodes",
       "albums",
       "artists",
-      "tvShows",
+      "people",
     ]);
   });
 
@@ -113,34 +117,78 @@ describe("normalizeGroupOrder", () => {
     expect(normalizeGroupOrder(["songs", "songs", "movies"])).toEqual([
       "songs",
       "movies",
+      "shows",
+      "episodes",
       "albums",
       "artists",
-      "tvShows",
+      "people",
     ]);
   });
 
   it("preserves a complete valid order unchanged", () => {
-    const order: SearchGroupId[] = ["tvShows", "movies", "artists", "albums", "songs"];
+    const order: SearchGroupId[] = [
+      "episodes",
+      "shows",
+      "movies",
+      "artists",
+      "albums",
+      "songs",
+      "people",
+    ];
     expect(normalizeGroupOrder(order)).toEqual(order);
   });
+
+  it("expands a stored `tvShows` into shows + episodes in place", () => {
+    // Migration: the old combined group split, and a user who put TV first
+    // must still get TV first rather than appended at the bottom.
+    expect(normalizeGroupOrder(["tvShows", "movies"])).toEqual([
+      "shows",
+      "episodes",
+      "movies",
+      "songs",
+      "albums",
+      "artists",
+      "people",
+    ]);
+  });
 });
 
 describe("groupsForScope", () => {
   it("returns every group in saved order for the all scope", () => {
-    expect(groupsForScope("all", ["movies", "songs", "tvShows", "albums", "artists"])).toEqual([
-      "movies",
-      "songs",
-      "tvShows",
-      "albums",
-      "artists",
-    ]);
+    expect(
+      groupsForScope("all", [
+        "movies",
+        "songs",
+        "shows",
+        "episodes",
+        "albums",
+        "artists",
+        "people",
+      ])
+    ).toEqual(["movies", "songs", "shows", "episodes", "albums", "artists", "people"]);
   });
 
   it("keeps only in-scope groups, in saved order", () => {
-    const order: SearchGroupId[] = ["artists", "movies", "albums", "tvShows", "songs"];
+    const order: SearchGroupId[] = [
+      "artists",
+      "movies",
+      "albums",
+      "episodes",
+      "shows",
+      "songs",
+      "people",
+    ];
     expect(groupsForScope("music", order)).toEqual(["artists", "albums", "songs"]);
     expect(groupsForScope("movies", order)).toEqual(["movies"]);
-    expect(groupsForScope("tv", order)).toEqual(["tvShows"]);
+    expect(groupsForScope("tv", order)).toEqual(["episodes", "shows"]);
+  });
+
+  it("surfaces people only under the all scope", () => {
+    // Cast/crew cut across music, film and TV, so no narrow scope claims them.
+    expect(groupsForScope("all", DEFAULT_GROUP_ORDER)).toContain("people");
+    expect(groupsForScope("music", DEFAULT_GROUP_ORDER)).not.toContain("people");
+    expect(groupsForScope("tv", DEFAULT_GROUP_ORDER)).not.toContain("people");
+    expect(groupsForScope("movies", DEFAULT_GROUP_ORDER)).not.toContain("people");
   });
 });
 
@@ -156,13 +204,29 @@ describe("composeSearchGroups", () => {
 
   it("renders groups in the configured order", () => {
     const groups = composeSearchGroups(results, "all", [
-      "tvShows",
+      "shows",
+      "episodes",
       "movies",
       "songs",
       "albums",
       "artists",
+      "people",
     ]);
-    expect(groups.map((g) => g.id)).toEqual(["tvShows", "movies", "songs", "albums"]);
+    expect(groups.map((g) => g.id)).toEqual([
+      "shows",
+      "episodes",
+      "movies",
+      "songs",
+      "albums",
+      "people",
+    ]);
+  });
+
+  it("puts shows ahead of episodes by default", () => {
+    // Searching a show's name should surface the show itself first, not an
+    // arbitrary episode of it.
+    const ids = composeSearchGroups(results, "tv", DEFAULT_GROUP_ORDER).map((g) => g.id);
+    expect(ids).toEqual(["shows", "episodes"]);
   });
 
   it("omits empty groups", () => {
@@ -177,27 +241,44 @@ describe("composeSearchGroups", () => {
       "albums",
     ]);
     expect(composeSearchGroups(results, "tv", DEFAULT_GROUP_ORDER).map((g) => g.id)).toEqual([
-      "tvShows",
+      "shows",
+      "episodes",
     ]);
   });
 
-  it("groups series and episodes together under tvShows", () => {
+  it("separates series and episodes into their own groups", () => {
     const groups = composeSearchGroups(results, "tv", DEFAULT_GROUP_ORDER);
-    expect(groups[0].items.map((i) => i.id)).toEqual(["4", "5"]);
+    expect(groups.find((g) => g.id === "shows")?.items.map((i) => i.id)).toEqual(["4"]);
+    expect(groups.find((g) => g.id === "episodes")?.items.map((i) => i.id)).toEqual(["5"]);
+  });
+
+  it("surfaces people so an actor search reaches their bio", () => {
+    // Person items were previously returned by the backend and silently dropped.
+    const all = composeSearchGroups(results, "all", DEFAULT_GROUP_ORDER);
+    expect(all.find((g) => g.id === "people")?.items.map((i) => i.id)).toEqual(["6"]);
   });
 
   it("ignores item types that belong to no group", () => {
-    const all = composeSearchGroups(results, "all", DEFAULT_GROUP_ORDER);
-    expect(all.flatMap((g) => g.items).map((i) => i.id)).not.toContain("6");
+    const withFolder = [...results, { id: "7", type: "CollectionFolder" }];
+    const all = composeSearchGroups(withFolder, "all", DEFAULT_GROUP_ORDER);
+    expect(all.flatMap((g) => g.items).map((i) => i.id)).not.toContain("7");
   });
 
   it("narrowing then widening restores the full arrangement", () => {
     // Scope is a filter over the saved order, never a rewrite of it.
-    const order: SearchGroupId[] = ["tvShows", "songs", "movies", "albums", "artists"];
+    const order: SearchGroupId[] = [
+      "shows",
+      "songs",
+      "movies",
+      "albums",
+      "artists",
+      "episodes",
+      "people",
+    ];
     const wide = composeSearchGroups(results, "all", order).map((g) => g.id);
     composeSearchGroups(results, "music", order);
     expect(composeSearchGroups(results, "all", order).map((g) => g.id)).toEqual(wide);
-    expect(wide).toEqual(["tvShows", "songs", "movies", "albums"]);
+    expect(wide).toEqual(["shows", "songs", "movies", "albums", "episodes", "people"]);
   });
 
   it("survives a stored order containing an unknown id", () => {
@@ -205,7 +286,14 @@ describe("composeSearchGroups", () => {
       "podcasts",
       "movies",
     ] as unknown as SearchGroupId[]);
-    expect(groups.map((g) => g.id)).toEqual(["movies", "songs", "albums", "tvShows"]);
+    expect(groups.map((g) => g.id)).toEqual([
+      "movies",
+      "shows",
+      "episodes",
+      "songs",
+      "albums",
+      "people",
+    ]);
   });
 
   it("handles items with a missing type", () => {
@@ -219,7 +307,7 @@ describe("composeSearchGroups", () => {
 });
 
 describe("moveGroup", () => {
-  const order: SearchGroupId[] = ["songs", "albums", "artists", "movies", "tvShows"];
+  const order: SearchGroupId[] = ["songs", "albums", "artists", "movies", "shows"];
 
   it("moves a group up", () => {
     expect(moveGroup(order, "artists", -1)).toEqual([
@@ -227,7 +315,7 @@ describe("moveGroup", () => {
       "artists",
       "albums",
       "movies",
-      "tvShows",
+      "shows",
     ]);
   });
 
@@ -237,13 +325,13 @@ describe("moveGroup", () => {
       "songs",
       "artists",
       "movies",
-      "tvShows",
+      "shows",
     ]);
   });
 
   it("is a no-op at the boundaries", () => {
     expect(moveGroup(order, "songs", -1)).toEqual(order);
-    expect(moveGroup(order, "tvShows", 1)).toEqual(order);
+    expect(moveGroup(order, "shows", 1)).toEqual(order);
   });
 
   it("is a no-op for an unknown id", () => {
@@ -258,18 +346,18 @@ describe("moveGroup", () => {
 });
 
 describe("reorderGroups", () => {
-  const order: SearchGroupId[] = ["songs", "albums", "artists", "movies", "tvShows"];
+  const order: SearchGroupId[] = ["songs", "albums", "artists", "movies", "shows"];
 
   it("moves an item from one index to another", () => {
     expect(reorderGroups(order, 0, 4)).toEqual([
       "albums",
       "artists",
       "movies",
-      "tvShows",
+      "shows",
       "songs",
     ]);
     expect(reorderGroups(order, 4, 0)).toEqual([
-      "tvShows",
+      "shows",
       "songs",
       "albums",
       "artists",
@@ -282,4 +370,4 @@ describe("reorderGroups", () => {
     expect(reorderGroups(order, -1, 2)).toEqual(order);
     expect(reorderGroups(order, 0, 9)).toEqual(order);
   });
-});
+});

src/lib/utils/searchScope.ts

@@ -66,47 +66,96 @@ export function resolveSearchScope(pathname: string): SearchScope {
 // Result groups
 // ---------------------------------------------------------------------------
 
-export type SearchGroupId = "songs" | "albums" | "artists" | "movies" | "tvShows";
+export type SearchGroupId =
+  | "shows"
+  | "episodes"
+  | "movies"
+  | "songs"
+  | "albums"
+  | "artists"
+  | "people";
 
-/** Shipped default order, per the spec. */
+/**
+ * Shipped default order.
+ *
+ * TRACES: UR-060 | DR-091
+ *
+ * Containers lead the kinds they contain — a show above its episodes, an album
+ * above nothing (songs are ranked separately) — which matches how people search:
+ * you look for the show, not an arbitrary episode of it. `people` sits last as
+ * a peripheral match; it exists so searching an actor's name reaches their bio
+ * page rather than silently dropping the result.
+ */
 export const DEFAULT_GROUP_ORDER: readonly SearchGroupId[] = [
+  "shows",
+  "episodes",
+  "movies",
   "songs",
   "albums",
   "artists",
-  "movies",
-  "tvShows",
+  "people",
 ];
 
 export const GROUP_LABELS: Record<SearchGroupId, string> = {
+  shows: "TV Shows",
+  episodes: "Episodes",
+  movies: "Movies",
   songs: "Songs",
   albums: "Albums",
   artists: "Artists",
-  movies: "Movies",
-  tvShows: "TV Shows",
+  people: "People",
 };
 
-/** Which scopes each group belongs to (`all` always includes everything). */
-const GROUP_SCOPE: Record<SearchGroupId, Exclude<SearchScope, "all">> = {
+/**
+ * Which scopes each group belongs to (`all` always includes everything).
+ *
+ * `people` maps to no narrow scope: cast/crew cut across music, film and TV, so
+ * it surfaces only under All rather than being forced into one of them.
+ */
+const GROUP_SCOPE: Record<SearchGroupId, Exclude<SearchScope, "all"> | null> = {
+  shows: "tv",
+  episodes: "tv",
+  movies: "movies",
   songs: "music",
   albums: "music",
   artists: "music",
-  movies: "movies",
-  tvShows: "tv",
+  people: null,
 };
 
 /** Item types that fall into each group. */
 const GROUP_ITEM_TYPES: Record<SearchGroupId, string[]> = {
+  shows: ["Series"],
+  episodes: ["Episode"],
+  movies: ["Movie"],
   songs: ["Audio"],
   albums: ["MusicAlbum"],
   artists: ["MusicArtist"],
-  movies: ["Movie"],
-  tvShows: ["Series", "Episode"],
+  people: ["Person"],
 };
 
 export function groupItemTypes(group: SearchGroupId): string[] {
   return [...GROUP_ITEM_TYPES[group]];
 }
 
+/**
+ * Stored group ids that no longer exist, mapped to the ids that replaced them.
+ *
+ * `tvShows` was one group holding both Series and Episode; it split so a show
+ * can outrank its own episodes. Expanding in place preserves the position the
+ * user chose for it.
+ *
+ * TRACES: UR-060 | DR-091
+ */
+const RETIRED_GROUP_IDS: Record<string, SearchGroupId[]> = {
+  tvShows: ["shows", "episodes"],
+};
+
+/** Resolve a stored id to the live id(s) it corresponds to, or none if unknown. */
+function migrateGroupId(id: string, known: Set<string>): SearchGroupId[] {
+  if (known.has(id)) return [id as SearchGroupId];
+  return RETIRED_GROUP_IDS[id] ?? [];
+}
+
 /**
  * Normalise a stored order into a usable one.
  *
@@ -123,11 +172,15 @@ export function normalizeGroupOrder(stored: unknown): SearchGroupId[] {
 
   if (Array.isArray(stored)) {
     for (const id of stored) {
-      if (typeof id !== "string" || !known.has(id)) continue;
-      const groupId = id as SearchGroupId;
-      if (seen.has(groupId)) continue;
-      seen.add(groupId);
-      order.push(groupId);
+      if (typeof id !== "string") continue;
+      // Retired ids expand in place rather than being dropped, so a user who
+      // dragged the old combined "TV Shows" group to the top keeps TV at the
+      // top instead of having shows/episodes appended to the bottom.
+      for (const groupId of migrateGroupId(id, known)) {
+        if (seen.has(groupId)) continue;
+        seen.add(groupId);
+        order.push(groupId);
+      }
     }
   }
 
@@ -143,6 +196,8 @@ export function groupsForScope(
   scope: SearchScope,
   order: readonly SearchGroupId[] = DEFAULT_GROUP_ORDER
 ): SearchGroupId[] {
+  // A `null` GROUP_SCOPE (people) belongs to no narrow scope, so it survives
+  // only under `all` — the `=== scope` test already excludes it elsewhere.
   return normalizeGroupOrder(order as SearchGroupId[]).filter(
     (id) => scope === "all" || GROUP_SCOPE[id] === scope
   );