Implement History mouse wheel navigation

docs/opcode-reference.md

@@ -594,6 +594,11 @@ op 0x90 (u0041BEB0, argc 7): `0x90 x y w h tgt_a tgt_b tgt_c`. Kelebek left it "
 - **grounding:** source=investigation, confidence=high
 - **evidence:** Ghidra /v2: op_0x10a_set_cursor_virtual@0x421590 maps virtual coordinates through the active VirtualFullScreen geometry and calls SetCursorPos. SC0000 alternates the cursor by one vertical pixel after state-changing ADV button clicks so the hover state re-enters cleanly.
 
+### 0x10d `consume-mouse-wheel-delta` (u00415F10, argc 1)
+- **summary:** (out) - return the accumulated signed mouse-wheel delta and clear it.
+- **grounding:** source=investigation, confidence=high
+- **evidence:** Ghidra /v2: op_0x10d_consume_mouse_wheel_delta@0x428cf0 copies ctx+0x1c34 to operand 1 and immediately clears the field. AGE's window procedure at 0x486925 handles WM_MOUSEWHEEL by sign-extending the high word of wParam and accumulating it at ctx+0x1c34; HISTORY.BIN polls this value and branches on its sign to select one scroll direction.
+
 ### 0x12e `find-hit-rectangle` (find-hit-rectangle, argc 8)
 - **summary:** (index_inout)(reference_rect)(pointer_x)(pointer_y)(rect_array)(x_offsets)(y_offsets)(count) - scan after the incoming index for the next inclusive rectangle intersection, or return -1.
 - **grounding:** source=investigation, confidence=high
@@ -878,10 +883,6 @@ op 0x90 (u0041BEB0, argc 7): `0x90 x y w h tgt_a tgt_b tgt_c`. Kelebek left it "
 - **summary:** —
 - **grounding:** source=kelebek, confidence=low
 
-### 0x10d `u00415F10` (u00415F10, argc 1)
-- **summary:** —
-- **grounding:** source=kelebek, confidence=low
-
 ### 0x12c `lookup-array-2d` (lookup-array-2d, argc 5)
 - **summary:** —
 - **grounding:** source=kelebek, confidence=med