Band Lineup 1.13.0: your own photos win, a photo dropped on someone becomes theirs, and the spots stay in reach while dragging

Photos. Sync fell back to the Planning Center headshot whenever two
library photos matched a person equally ("Mike" and "mike"), and had no
way to know "Rose" is Rosaliz — so the booth dragged those in by hand
every week. Now:
- Several equally good library photos is not a reason to use PCO's; the
  first of them is used. PCO's headshot is only for someone with no photo.
- Dropping a library photo onto the synced person already in that spot
  (same name, same first name, or a nickname sharing its first three
  letters) makes it their photo: they keep their Planning Center name and
  spot, and it is remembered (settings.json photoFor) for every later
  Sync. Photos already dragged in by hand for this plan are learned the
  same way on the next Sync.
- A synced person's library photo is read live, so replacing that photo
  updates the board without a re-sync.

Dragging. The editor was one scrolling column, so a photo found far down
the list had to be carried back up to its spot, and every drop redrew the
editor back to the top. The spots are now pinned in their own pane above
the photos, each pane auto-scrolls when a drag nears its edge, both keep
their scroll position through redraws, and a search box filters the
photos by name.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -521,14 +521,21 @@ below. Nothing is installed without someone clicking.
   A photo library fills it: point the module at a Google Drive folder shared
   "anyone with the link" (file name → person's name) or at a folder on the
   ProdDash machine, and photos added or removed there follow. **Edit** in the
-  title bar opens that library — drag a photo onto a slot (mouse, or press and
+  title bar opens that library — the spots pinned on top, the photos (with a
+  name search) scrolling below — drag a photo onto a slot (mouse, or press and
   hold on a touchscreen), drag between slots to swap, rename or clear.
+  Dropping a photo onto the person already in a spot makes it *their* photo
+  (a nickname like "Rose" for Rosaliz counts): they keep their Planning Center
+  name and spot, and every later Sync uses that photo for them.
   Planning Center is optional auto-fill on top, not the source of truth:
   **Sync** reads the upcoming plan's team members and places each one. A
   person whose Planning Center note names their mic ("Mix 8, VOX 5") goes to
   that slot — this is how the leader and vocalists, whose position is just
   "Vocalist", land on the right mic — and everyone else goes to the slot
-  matching their position, one slot per person. Anything placed or moved by
+  matching their position, one slot per person. Photos come from the library
+  whenever it has one of them — their remembered pick, else the best name
+  match, even when several photos fit — and Planning Center's headshot only
+  when it has none. Anything placed or moved by
   hand for that plan stays put through later syncs; last week's people are
   replaced.
   Birthdays in the service week (Wednesday→Tuesday) bring a gold glow and