A mouse report before the first row or column (SGR's 0, a drag past the window's top or left, in cells or 1016's pixels) is the window's edge in the terminal and the ESP32 shells, never a panic that lost unsaved text; the GUI already clamped

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 3 insertions, 2 deletions

diff --git a/src/esp32p4.zig b/src/esp32p4.zig
index 4e1fe036..6772e75d 100644
--- a/src/esp32p4.zig
+++ b/src/esp32p4.zig
@@ -455,8 +455,9 @@ fn apply(c: *pardes.Pardes, ev: vaxis.Event) void {
                         .motion => .motion,
                         .drag => .drag,
                     },
-                    .col = @intCast(m.col),
-                    .row = @intCast(m.row),
+                    // Before the first cell (a drag past the edge): the edge.
+                    .col = @intCast(@max(0, m.col)),
+                    .row = @intCast(@max(0, m.row)),
                     .ctrl = m.mods.ctrl,
                 } });
                 dirty = true;