abstract input into platform layer

src/platform/platform.h

@@ -2,10 +2,11 @@
 
 #include <stdint.h>
 #include <stdbool.h>
+#include "base/base_core.h"
+#include "base/base_math.h"
 
 ////////////////////////////////
-// Input event buffer
-// Accumulated per frame, consumed by the app each tick.
+// Input — accumulated per frame, consumed by the app each tick.
 
 #define PLATFORM_MAX_CHARS_PER_FRAME 64
 #define PLATFORM_MAX_KEYS_PER_FRAME  32
@@ -29,7 +30,7 @@ enum {
     PKEY_X         = 0x58,
 };
 
-struct PlatformInputEvents {
+struct PlatformInput {
     // Typed characters (UTF-16 code units, printable only)
     uint16_t chars[PLATFORM_MAX_CHARS_PER_FRAME];
     int32_t  char_count;
@@ -41,6 +42,12 @@ struct PlatformInputEvents {
     // Modifier state at time of last key event
     bool     ctrl_held;
     bool     shift_held;
+
+    // Mouse state (polled per frame)
+    Vec2F32  mouse_pos;
+    Vec2F32  scroll_delta;
+    B32      mouse_down;
+    B32      was_mouse_down;
 };
 
 struct PlatformWindow;
@@ -77,8 +84,8 @@ void            platform_set_frame_callback(PlatformWindow *window, PlatformFram
 void            platform_set_menu(PlatformWindow *window, PlatformMenu *menus, int32_t menu_count);
 int32_t         platform_poll_menu_command(PlatformWindow *window);
 
-// Returns accumulated input events since last call, then clears the buffer.
-PlatformInputEvents platform_get_input_events(PlatformWindow *window);
+// Returns accumulated input since last call (keyboard events + polled mouse state), then clears the buffer.
+PlatformInput platform_get_input(PlatformWindow *window);
 
 // Clipboard operations (null-terminated UTF-8 strings).
 // platform_clipboard_set copies text to the system clipboard.