feat(ui): Map/House panel — slices 2+3, panel shell + Map tab

Mounts host 0x2100006E slot 0x1000018C (RetailPanelCatalog.MapHouse = 16)
as a two-tab UiTabPanel (Map default, House second) through the OP3/FA3
recipe (LayoutImporter.Build -> Bind -> ActivateTabBehavior). Toolbar
button 0x1000019A un-ghosts (added to both RetailPanelCatalog.Mounted and
.Toolbar). Combined into one commit because MapHousePanelController.Bind
depends on both MapPageController and HousePageController existing —
splitting them would mean landing dead code first.

Map tab (gmMapUI, MapPageController):
- Calendar formatter matching gmMapUI::Update's "Date: %s\nTime: %s"
  shape, reusing WorldTimeService.CurrentCalendar (new
  Func<DerethDateTime.Calendar> dependency threaded through
  InteractionRetainedUiDependencies/GameWindow — a stable long-lived
  service, not routed through the deferred-binding machinery Radar's
  per-session state needs). MonthName enum values already match retail
  display text; HourName's "AndHalf" suffix is rewritten to "-and-Half".
- Coordinate math + marker placement reuse RadarCoordinates/
  LandDefs.GidToLcoord verbatim (both already byte-exact ports of
  CPlayerSystem::InqPlayerCoords/LandDefs::gid_to_lcoord) — no re-port.
  PlaceMarkerOnMap's centering math (m_x0 + x - w/2) ported from
  gmMapUI::PlaceMarkerOnMap @0x004a18b0. Indoor gating clears the
  coordinate text and hides the player marker, matching
  gmMapUI::Update's else branch.
- 53-town s_rgLocations table ported verbatim into MapLocations.cs.
  Markers built once at bind time via the panel's own RowTemplateResolver
  against m_pMap's authored hotspot-template attrs (0x47/0x48), with
  literal-string tooltips through AuthoredTooltipText/Enabled
  (RetailTooltipPresenter) — closes divergence-register row TS-85's last
  item, gmMapUI::AddMapNote @0x004A1C51.
- Structural finding: m_pMap (0x100001EC) is itself authored as a Type-1
  BUTTON (the GM click-to-teleport hook at
  gmMapUI::ListenToElementMessage), and the player/house icons
  (0x100001ED/EE) are its own NESTED children, not siblings —
  UiButton.ConsumesDatChildren swallows them from the normally-built
  tree. Both are re-resolved standalone through the same template
  resolver the town hotspots use and reattached under m_pMap.

House tab (gmHouseUI, HousePageController): mounts the ListBox
(0x100001E6) with its authored row template, wired to an empty Lines()
source by default — genuinely empty until Slice 4's wire lands, matching
retail's own PostInit (no Update call, no static content).

21 new tests (7 MapHousePanelControllerTests, 14 MapPageControllerTests):
tab table pairing, close button, town-hotspot count/tooltips, calendar
formatter golden values (Frostfell 27/119 P.Y., every HourName incl.
AndHalf), player/house marker placement and indoor-gating reproduced
against the real fixture via already-tested RadarCoordinates (no
re-derivation). Fixture map_house_2100006E_1000018C.json captured via
the shared RetailLayoutFixtureGenerator (other 34 fixtures deliberately
NOT regenerated — out of scope for this batch, would touch unrelated
panels' schema drift).

Full solution builds clean; App suite 5391/0 failed/71 skipped (non-live;
one earlier flaky streaming failure unrelated to this change, confirmed
pre-existing on the branch before these commits).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/AcDream.App.Tests/UI/Layout/RetailLayoutFixtureGenerator.cs

@@ -153,6 +153,11 @@ public sealed class RetailLayoutFixtureGenerator
             // lane-A unknowns U3/U4/U6/U7/U10.
             (SocialPanelController.HostLayoutId, SocialPanelController.SlotElementId,
                 "social_panel_2100006E_1000018F.json"),
+            // Batch C (overnight hover/UI round, 2026-08-17): the two-tab
+            // Map/House panel — recon doc
+            // docs/research/2026-08-17-map-house-recon.md.
+            (MapHousePanelController.HostLayoutId, MapHousePanelController.SlotElementId,
+                "map_house_2100006E_1000018C.json"),
         })
         {
             ElementInfo? panelPart = LayoutImporter.ImportInfos(dats, layoutId, rootId);