Fix id-namespace regression, add StrikeRequest type, kill full-panel

rerender on assign/alive/shell, add Windows build tooling

- Board.add_target/add_ally's id auto-assignment used a bare
  next(c for c in string.ascii_uppercase if c not in used), which
  raises StopIteration once 26 entities of a group exist -- a real
  crash confirmed via a live traceback, and a direct regression from
  moving that sequence from per-type to per-group. This was the actual
  cause of "Accept as"/"Accept all" silently doing nothing. Fixed with
  _next_free_id(), which rolls over to two-letter ids instead of
  raising.
- New TargetType.STRIKE_REQUEST: the bearing/distance-offset "taking
  fire" fire-support request (see the earlier two-entity split) now
  creates this instead of reusing STRIKE, so a radioed-in request is
  never confused with a strike the player placed themselves. Same
  crosshair icon, excluded from type pickers/dedupe like STRIKE.
- The "Accept as..." popover on a detected map marker now uses the
  same icon grid the entity-edit "Change type" popover does (was a
  plain unfiltered text list of every TargetType, which also wrongly
  offered STRIKE/STRIKE_REQUEST as pickable).
- Firing panel: _cycle_assignment/_toggle_alive/_pick_shell no longer
  route through app.py's full solver+dedupe+canvas+panel refresh --
  none of the three can affect the solver or dedupe, and none change
  which cards exist or their order (except _toggle_alive in
  hide/sort_later mode). New FiringPanel._rebuild_one() rebuilds just
  the one changed card; on_visual_change is a new, lighter callback
  (just a map redraw) for the two of these three that actually affect
  it. This was a real, confirmed lag source with many units on the
  board: every click on any of these was previously rebuilding every
  card of every target.
- Map right-click entity menu: added "Mark destroyed"/"Mark alive",
  reusing the same cheap-refresh path (new
  FiringPanel.refresh_after_alive_change).
- packaging/windows/: a from-scratch (untested against a real boot)
  MSYS2 + WiX .msi build pipeline for Windows, driven from Linux via
  dockur/windows (KVM-in-container), no Windows machine or GitHub
  required. See its own README for status/caveats.
- New/updated tests: id-namespace sharing + the 26-entity overflow
  regression (tests/test_models.py), StrikeRequest split
  (tests/test_ocr.py), warp_to_map's img_scale param
  (tests/test_map_vision_warp.py). 44/44 passing.

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

tests/test_models.py

@@ -67,6 +67,45 @@ def test_ally_and_target_ids_are_independent_namespaces():
     assert a_auto.id == "A"  # first free letter among *allies* only, unaffected by the target above
 
 
+def test_auto_id_is_shared_across_types_within_targets_and_within_allies():
+    """The id namespace split is targets-vs-allies ONLY -- different types
+    within the same group (all targets, or all allies) share one A/B/C...
+    sequence, they do NOT each get their own independent sequence. A Tank
+    and an Infantry auto-assigned back to back must get 'A' and 'B', never
+    both 'A'."""
+    board = Board()
+    tank = board.add_target(TargetType.TANK, _coord())
+    infantry = board.add_target(TargetType.INFANTRY, _coord())
+    assert tank.id == "A"
+    assert infantry.id == "B"  # not 'A' again just because it's a different type
+
+    ally_tank = board.add_ally(TargetType.TANK, _coord())
+    ally_infantry = board.add_ally(TargetType.INFANTRY, _coord())
+    assert ally_tank.id == "A"
+    assert ally_infantry.id == "B"
+
+
+def test_auto_id_survives_past_26_entities_in_one_group():
+    """A real crash: `next(c for c in string.ascii_uppercase if c not in
+    used)` raises StopIteration the instant all 26 letters are taken --
+    reachable after accepting 26+ map-screenshot proposals into the same
+    group (targets, or allies) in one session, since the fix making the
+    id sequence shared across types (not per-type) made 26 much easier
+    to hit. Must roll over to two-letter ids ('AA', 'AB', ...) instead of
+    raising."""
+    board = Board()
+    for _ in range(26):
+        board.add_target(TargetType.TANK, _coord())
+    twenty_seventh = board.add_target(TargetType.TANK, _coord())
+    assert twenty_seventh.id == "AA"
+
+    board2 = Board()
+    for _ in range(26):
+        board2.add_ally(TargetType.TANK, _coord())
+    twenty_seventh_ally = board2.add_ally(TargetType.TANK, _coord())
+    assert twenty_seventh_ally.id == "AA"
+
+
 def test_find_by_name_prefers_target_over_same_named_ally():
     """find_by_name() (used to resolve Clue references) checks targets
     before allies -- documented, deliberate priority, not a namespace