feat(web): merge search filters into one row and tidy episode versions (POLISH-1)

- H&R becomes a quick-filter facet (yes/no/unknown, with counts) on search
  results and the site resources tab; drop the old free/H&R selects, keep
  size range and sort on the same row (mobile: drawer), single clear button
- legacy free/hr URL params migrate into quick filters; stored selections
  keep the same localStorage key
- search timing and query terms move into TechInfo
- library episode versions: click the whole row to expand, versions listed
  as sibling rows, details only under the selected version, raw values in
  TechInfo
- slot comparison gaps get reason codes (matchGapText in contracts
  reasons.ts): "可换成 2160p", "缺 HDR 版本"

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packages/domain/test/library-versions.test.ts

@@ -145,6 +145,7 @@ describe("与版本目标比对", () => {
       state: "missing",
       assetId: null,
       reasons: [],
+      codes: [],
     });
   });
 
@@ -158,12 +159,29 @@ describe("与版本目标比对", () => {
     expect(m.state).toBe("upgradeable");
     expect(m.assetId).toBe("bd");
     expect(m.reasons.join(" ")).toMatch(/1080p/);
+    expect(m.codes).toEqual(["version_resolution:2160p"]);
+  });
+
+  it("差距原因码:HDR / 字幕 / 来源带目标参数", () => {
+    const hdr: SlotSpec = { id: "h", name: "h", hard: { hdr: { anyOf: ["DV", "HDR10"] } } };
+    expect(matchVersions(hdr, [v("bd", BD_FILE)], { isEpisode: true }).codes).toEqual(["version_hdr"]);
+    const dvOnly: SlotSpec = { id: "d", name: "d", hard: { hdr: { anyOf: ["DV"] } } };
+    expect(matchVersions(dvOnly, [v("bd", BD_FILE)], { isEpisode: true }).codes).toEqual(["version_hdr:DV"]);
+    const remux: SlotSpec = { id: "r", name: "r", hard: { sources: ["REMUX", "BluRay-Disc"] } };
+    expect(matchVersions(remux, [v("dv", DV_FILE, PROBE_DV)], { isEpisode: true }).codes).toEqual([
+      "version_source:REMUX",
+    ]);
   });
 
   it("达标但升级策略还有余量 = upgradeable;到顶 = satisfied", () => {
     const up: SlotSpec = { id: "s", name: "x", hard: {}, upgrade: { enabled: true } };
     const web = matchVersions(up, [v("dv", DV_FILE, PROBE_DV)], { isEpisode: true });
-    expect(web).toMatchObject({ state: "upgradeable", assetId: "dv", reasons: ["来源还能升级"] });
+    expect(web).toMatchObject({
+      state: "upgradeable",
+      assetId: "dv",
+      reasons: ["来源还能升级"],
+      codes: ["version_source_upgrade"],
+    });
     const capped: SlotSpec = { ...up, upgrade: { enabled: true, ceilingTier: 2 } };
     expect(matchVersions(capped, [v("dv", DV_FILE, PROBE_DV)], { isEpisode: true }).state).toBe("satisfied");
     const onlyWeb: SlotSpec = { ...up, hard: { sources: ["WEB-DL"] } };