feat: all-white mouse cursor across desktop/login/firstInit

CODE/desktop/input.c

@@ -133,7 +133,7 @@ void cursor_draw(int mx, int my) {
     for (int r = 0; r < CURSOR_SIZE; r++) {
         for (int c = 0; c < CURSOR_SIZE; c++) {
             if (cursor_shape[r][c]) {
-                du_pixel(&g_fb, mx + c, my + r, KS_ACCENT);
+                du_pixel(&g_fb, mx + c, my + r, 0xFFFFFFFFu);   /* 白色指针 */
             }
         }
     }

CODE/firstInit/main.c

@@ -499,8 +499,8 @@ static void cursor_draw(u32 *fb, i64 mx, i64 my) {
     cursor_bg_valid = 1;
     cursor_cur_x = mx;
     cursor_cur_y = my;
-    /* draw cursor shape */
-    u32 white = 0xFFFFFFFF, dark = 0xFF304760;
+    /* draw cursor shape（全白指针，深色描边改白） */
+    u32 white = 0xFFFFFFFF, dark = 0xFFFFFFFF;
     for (i64 y = 0; y < CUR_H; y++) {
         i64 py = my + y;
         if (py < 0 || (u64)py >= fb_h) continue;

CODE/login/main.c

@@ -349,7 +349,7 @@ static void cursor_restore_bg(u32 *fb) {
 }
 
 static void cursor_draw(u32 *fb, int mx, int my) {
-    u32 fg = ACCENT;
+    u32 fg = 0xFFFFFFFF;   /* 白色指针 */
     for (int r = 0; r < CURSZ; r++) {
         for (int c = 0; c < CURSZ; c++) {
             if (!cursor_shape[r][c]) continue;