c: fix enums for input

src/App.zig

@@ -419,8 +419,12 @@ pub const CAPI = struct {
         win: *Window,
         action: input.Action,
         key: input.Key,
-        mods: input.Mods,
+        mods: c_int,
     ) void {
-        win.window.keyCallback(action, key, mods);
+        win.window.keyCallback(
+            action,
+            key,
+            @bitCast(input.Mods, @truncate(u8, @bitCast(c_uint, mods))),
+        );
     }
 };

src/input/key.zig

@@ -3,6 +3,8 @@ const Allocator = std.mem.Allocator;
 
 /// A bitmask for all key modifiers. This is taken directly from the
 /// GLFW representation, but we use this generically.
+///
+/// IMPORTANT: Any changes here update include/ghostty.h
 pub const Mods = packed struct(u8) {
     shift: bool = false,
     ctrl: bool = false,
@@ -25,6 +27,8 @@ pub const Mods = packed struct(u8) {
 
 /// The action associated with an input event. This is backed by a c_int
 /// so that we can use the enum as-is for our embedding API.
+///
+/// IMPORTANT: Any changes here update include/ghostty.h
 pub const Action = enum(c_int) {
     release,
     press,
@@ -38,6 +42,8 @@ pub const Action = enum(c_int) {
 /// unicode character is sent directly to the pty.
 ///
 /// This is backed by a c_int so we can use this as-is for our embedding API.
+///
+/// IMPORTANT: Any changes here update include/ghostty.h
 pub const Key = enum(c_int) {
     invalid,