fix(flippers): match original moving-hit geometry

The clone's moving-flipper gate used the cross-product operands in the
opposite order, mirroring and narrowing the hit wedge. Right-flipper release
also used record 81's first endpoint even though the original reads its second
endpoint. Correct both geometry paths, retain the recovered swept tip bounds,
and add live-binary boundary vectors plus a dense transition regression.

Test Plan:
- `cargo test --workspace --all-targets --all-features` -- passed (134 tests)
- `cargo clippy --workspace --all-targets --all-features -- -D warnings` -- passed
- `cargo build --profile production` -- passed
- `LSAN_OPTIONS=detect_leaks=0 ASAN_OPTIONS=detect_leaks=0 bash original/tools/test_reconstructed_c.sh` -- passed
- `python3 original/tools/audit_reconstruction.py --require-complete` -- passed
- `git diff --cached --check` -- passed

original/reconstructed/tests/test_flipper_collision.c

@@ -185,11 +185,25 @@ static void test_right_positive_contact(void)
                win16_far_add_offset(g_receiver, 0x0baa)) == -737);
     assert((int32_t)win16_read_u32(
                win16_far_add_offset(g_receiver, 0x0bae)) == 2263);
-    assert(g_move_x == -8549 && g_move_y == 26250);
+    assert(g_move_x == -5578 && g_move_y == 17127);
     assert(g_sound_count == 1 && g_sounds[0] == 21);
     assert(g_move_calls == 1);
 }
 
+static void test_live_binary_cross_product_order(void)
+{
+    prepare_fixture();
+    win16_write_u32(g_receiver, 0x56, 3800);
+    set_ball(100000, 370000, 1000, 2000);
+    tdkpin_move_flipper_collision_geometry(0x0300, -1, 1, 0);
+    assert((int32_t)win16_read_u32(
+               win16_far_add_offset(g_receiver, 0x0baa)) == -189);
+    assert((int32_t)win16_read_u32(
+               win16_far_add_offset(g_receiver, 0x0bae)) == 960);
+    assert(g_move_x == 0 && g_move_y == 0);
+    assert(g_move_calls == 1);
+}
+
 static void test_left_positive_contact(void)
 {
     prepare_fixture();
@@ -230,8 +244,12 @@ static void test_vertical_edge_fallbacks(void)
     prepare_fixture();
     write_i32(
         81,
-        offsetof(TdkpinCollisionRecord, point1_x_milli),
+        offsetof(TdkpinCollisionRecord, point2_x_milli),
         240000);
+    write_i32(
+        81,
+        offsetof(TdkpinCollisionRecord, point2_y_milli),
+        411000);
     set_ball(197000, 455000, -1000, 2000);
     tdkpin_move_flipper_collision_geometry(0x0300, 1, 2, 0);
     assert(g_move_calls == 1 && g_move_y == 1000);
@@ -270,6 +288,7 @@ int main(void)
 {
     test_left_negative_contact();
     test_right_positive_contact();
+    test_live_binary_cross_product_order();
     test_left_positive_contact();
     test_right_negative_contact();
     test_vertical_edge_fallbacks();