Vamooses Neighbors

### Added
- "My Homes" section in the Directory > Neighborhood sub-tab: persistent rows
  (one per owned house) showing faction icon, neighborhood name, house name,
  cooldown remaining, and a labelled Teleport button for each. Each button is
  its own SecureActionButton bound to that specific house's GUIDs, so you can
  teleport directly to any of your homes without relying on a "default" slot
  (thanks Mr. Fluffy).
- Return to Previous Location button: header slot with the returnhome secure
  action, letting you return to where you were before a housing teleport
  without opening the housing dashboard.
- Teleport cooldown sweep on each My Homes row button (native Blizzard widget
  via C_Housing.GetVisitCooldownInfo), plus a remaining-time label beside the
  button that shows minutes (e.g. "13m") above 60s and seconds ("45s") below.
- Loading indicator for endeavor data: when initiative info hasn't arrived from
  the server yet, the row shows "Loading endeavor..." instead of a blank space,
  and the progress bar reads "Loading..." until the update fires.
- Plot Markers header tooltip now refreshes in place on each click so the label
  matches the newly-active mode without needing to re-hover.

### Changed
- Moved Teleport Home actions out of the cramped header into the new My Homes
  rows in the Directory tab. Header now has only Close / Plot Markers / Return.
  Rows give each house room for its full neighborhood + house name plus the
  shared visit/teleport cooldown.
- Friends and Guild sub-tabs now lay out compactly directly under the sub-tab
  bar instead of reserving vertical space for the Neighborhood-only initiative
  bar and My Homes rows. The scroll area follows the search box so the full
  list is visible without scrolling past empty whitespace.

### Fixed
- Teleport Home button no longer locked to a single house: previously the addon
  hardcoded houses[1] from PLAYER_HOUSE_LIST_UPDATED, so there was no way to
  teleport to a non-default home.
- Endeavor progress no longer flashes blank on panel open. Data:RefreshInitiative
  was clearing `initiative = nil` before every async refetch, destroying
  already-arrived data during the server round-trip. Now it trusts
  NEIGHBORHOOD_INITIATIVE_UPDATED to keep state fresh in the background
  (matches VE's pattern) and only clears when the player leaves all
  neighborhoods.
- Map drawer waypoint pin now clears when the map toggle button is used to
  close the drawer, and can also be cleared by right-clicking the pin itself.
  Previously the pin persisted on both the drawer and the world map until
  /reload. Clear calls C_Map.ClearUserWaypoint and releases supertracking.