style(md3): 全面MD3对齐P0-P3 — P0扁平行列表容器化(meow_listview_set_container容器模式:surfaceContainer圆角卡12dp+tonal状态层+去分隔线;sub_page/settings_page/bg_page圆角容器) P1按钮胶囊化+shape令牌(extrasmall/small/medium/large/full) P2状态层补齐 P3子控件(Switch off-track/NavBar pill64×32/Checkbox24/对话框28);宿主test_meow_md3等全过,0warning;meow_ui.a变M6.36需重编+四App重链

patch_v2/meow_launcherd/bg_page.c

@@ -226,9 +226,9 @@ static void bgm_row_draw(void *ctx, int idx, sub_row_t *r,
     int ry = cy + (ch - (th + tsub + 4)) / 2;   /* 内容在卡内垂直居中（行中心=卡中心） */
     if (r->label) meow_ui_text(rx, ry, r->label, 20, mt->onSurface);
     if (r->sub)   meow_ui_text(rx, ry + th + 4, r->sub, 16, mt->onSurfaceVariant);
-    /* 行内杀按钮（圆角框 + 「杀」；error=红=杀） */
+    /* 行内杀按钮（全形=胶囊（bh/2）；「杀」；error=红=杀）——P1 按钮胶囊化 */
     int bx, by, bw, bh; bgm_btn_rect(x, y, w, h, &bx, &by, &bw, &bh);
-    meow_ui_draw_rect_round(bx, by, bw, bh, 10, mt->error);
+    meow_ui_draw_rect_round(bx, by, bw, bh, bh / 2, mt->error);
     int bth = meow_ui_text_height(16);
     if (bth > bh) bth = bh;
     meow_ui_text_center(bx + bw / 2, by + (bh - bth) / 2, "杀", 16, mt->error);