fix(sdk/hello): P1 z-order重叠(FAB被下层动态控件抹掉,d_redraw→d_paint_region按z栈重画重叠区) + P2 list焦点(命中非list区域释放焦点滚页面) + P3 list脏区(W_LIST裁剪视口,标题栏/底部无残留) (agent-166)

meow_ui_widget.c

@@ -984,26 +984,40 @@ void meow_widget_draw(meow_widget *w)
         int last  = (item > 0) ? (off + vp) / item + 1 : 0;
         if (first < 0) first = 0;
         if (last > w->count) last = w->count;
+        /* 视口绝对边界：列表只在其内绘制，杜绝越界泄漏（部分行滚出视口时把填充/分隔线/文本
+         * 画到视口外 → 标脏并上屏 → 标题栏/底部残留脏区，P3）。 */
+        int vx0 = w->x, vy0 = w->y, vx1 = w->x + w->w, vy1 = w->y + w->h;
+        int thh = meow_ui_text_height(th->font_body);
         for (int i = first; i < last; i++) {
             char label[64] = "";
             if (!w->src || !w->src(i, label, (int)sizeof label, w->ctx)) continue;
             int pos = i * item - off;   /* 相对容器起点的可视位置 */
             if (w->horizontal) {
                 int rx = w->x + pos;
-                if (rx >= w->x + w->w) break;
-                if (i == w->sel) meow_ui_fill_rect(rx, w->y, item, w->h, th->primary);
+                if (rx >= vx1) break;                       /* 完全在右缘外 */
+                if (rx + item <= vx0) continue;             /* 完全在左缘外（滚出残余） */
+                int cl = rx > vx0 ? rx : vx0;               /* 可见左界 */
+                int cr = (rx + item) < vx1 ? (rx + item) : vx1;   /* 可见右界 */
+                if (i == w->sel) meow_ui_fill_rect(cl, w->y, cr - cl, w->h, th->primary);
                 uint32_t col = (i == w->sel) ? 0xFFFFFF : th->onSurface;
-                meow_ui_text_center(rx + item / 2, w->y + (w->h - meow_ui_text_height(th->font_body)) / 2,
-                                    label, th->font_body, col);
-                meow_ui_fill_rect(rx + item - 1, w->y, 1, w->h, th->onSurfaceVariant);
+                int ty = w->y + (w->h - thh) / 2;
+                if (rx >= vx0 && rx + item <= vx1)          /* 仅整项可见才画文本（防泄漏） */
+                    meow_ui_text_center(rx + item / 2, ty, label, th->font_body, col);
+                int sxp = rx + item - 1;                    /* 分隔线：仅当落在可见区 */
+                if (sxp >= cl && sxp < cr) meow_ui_fill_rect(sxp, w->y, 1, w->h, th->onSurfaceVariant);
             } else {
                 int ry = w->y + pos;
-                if (ry >= w->y + w->h) break;
-                if (i == w->sel) meow_ui_fill_rect(w->x, ry, w->w, item, th->primary);
+                if (ry >= vy1) break;                       /* 完全在底缘外 */
+                if (ry + item <= vy0) continue;             /* 完全在顶缘外（滚出残余） */
+                int cl = ry > vy0 ? ry : vy0;               /* 可见顶界 */
+                int cr = (ry + item) < vy1 ? (ry + item) : vy1;   /* 可见底界 */
+                if (i == w->sel) meow_ui_fill_rect(w->x, cl, w->w, cr - cl, th->primary);
                 uint32_t col = (i == w->sel) ? 0xFFFFFF : th->onSurface;
-                meow_ui_text(w->x + pad, ry + (item - meow_ui_text_height(th->font_body)) / 2,
-                             label, th->font_body, col);
-                meow_ui_fill_rect(w->x, ry + item - 1, w->w, 1, th->onSurfaceVariant);
+                int ty = ry + (item - thh) / 2;
+                if (ty >= vy0 && ty + thh <= vy1)           /* 文本不越界才画（防标题/底部泄漏） */
+                    meow_ui_text(w->x + pad, ty, label, th->font_body, col);
+                int sy = ry + item - 1;                     /* 分隔线：仅当落在可见区 */
+                if (sy >= cl && sy < cr) meow_ui_fill_rect(w->x, sy, w->w, 1, th->onSurfaceVariant);
             }
         }
         if (disabled) meow_ui_fill_rect_alpha(w->x, w->y, w->w, w->h, th->onSurface, 90);