二七王：LayoutSolver grid 补显式失败校验，attach 四角补精确坐标测试

审查发现 _solveGrid 在 count > cols*rows 时静默截断多出的项，违反显式失败
红线；补校验直接抛错并报出 count 与容量。fillOrder 字段之前从未被读取、
形同虚设，改为显式拒绝除 'row' 外的值（不实现列优先，YAGNI）。
测试补 grid 超载/恰好满格/fillOrder 三态，以及 attach 四角(topLeft/
bottomLeft/bottomRight)的精确坐标核对（此前只有 topRight 有精确值）。

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

client/js/01_SubGame/codes/ui/LayoutSolver.js

@@ -137,7 +137,17 @@ var EQW_LayoutSolver = EQW_LayoutSolver || {
 
     //grid：固定行列的按钮阵，逐行调 distributeHorizontally（清单 §6.1）
     _solveGrid: function (n, ctx) {
-        var count = (typeof ctx.count === 'number') ? ctx.count : (n.cols * n.rows);
+        //fillOrder 目前只实现行优先；不写等同 row，写了别的值一律显式拒绝（YAGNI，不做无人用的列优先）
+        if (n.fillOrder && n.fillOrder !== 'row') {
+            throw new Error('[EQW_LayoutSolver] grid 仅支持 fillOrder=row，暂不支持: ' + n.fillOrder);
+        }
+
+        var capacity = n.cols * n.rows;
+        var count = (typeof ctx.count === 'number') ? ctx.count : capacity;
+        //配置与运行时项数不一致时必须显式报错，不能静默截断多出的项（工程总则 §7 显式失败）
+        if (count > capacity) {
+            throw new Error('[EQW_LayoutSolver] grid 项数超出容量: count=' + count + ' > cols(' + n.cols + ')*rows(' + n.rows + ')=' + capacity);
+        }
         if (count <= 0) { return []; }
 
         var out = [];

client/tests/test_layoutsolver.js

@@ -87,6 +87,21 @@ t.eq('grid 第8项 y', g[7].y, 160 + 56 + 24);
 // count 少于满格时只出 count 个
 t.eq('grid 不足一行', EQW_LayoutSolver.solve(grid, { count: 3 }).length, 3);
 
+// 边界：count 恰好等于容量（cols*rows=14）时正常返回，不抛错
+t.eq('grid 恰好满格不抛错', EQW_LayoutSolver.solve(grid, { count: 14 }).length, 14);
+
+// count 超出容量：显式抛错，不静默截断多出的项
+t.eq('grid 超载抛错', throws(() => EQW_LayoutSolver.solve(grid, { count: 15 })), true);
+
+// fillOrder 校验：目前只支持行优先（YAGNI，未实现列优先），不写等同 row
+const gridNoFillOrder = { kind: 'grid', anchorX: 640, anchorY: 160, cols: 7, rows: 2,
+                          itemWidth: 74, itemHeight: 56, spacingX: 7, spacingY: 24, anchor: 'center' };
+t.eq('grid 不写 fillOrder 正常', EQW_LayoutSolver.solve(gridNoFillOrder, { count: 14 }).length, 14);
+t.eq('grid fillOrder=row 正常', EQW_LayoutSolver.solve(grid, { count: 14 }).length, 14);
+const gridColumnOrder = { kind: 'grid', anchorX: 640, anchorY: 160, cols: 7, rows: 2,
+                          itemWidth: 74, itemHeight: 56, spacingX: 7, spacingY: 24, anchor: 'center', fillOrder: 'column' };
+t.eq('grid fillOrder=column 抛错', throws(() => EQW_LayoutSolver.solve(gridColumnOrder, { count: 14 })), true);
+
 // ============ attach 内部对齐（corner 为空）============
 const rects = { TARGET: { x: 100, y: 200, width: 80, height: 40 } };
 const attachIn = { kind: 'attach', target: 'TARGET', hAlign: 'right', vAlign: 'top',
@@ -107,12 +122,29 @@ const attachCorner = { kind: 'attach', target: 'TARGET', corner: 'topRight',
 const a2 = EQW_LayoutSolver.solve(attachCorner, { rects: rects });
 t.eq('attach 外侧右上角', a2, [{ x: 100 + 80 - 20 + 4, y: 200 + 6, width: 20, height: 10 }]);
 
-// 四个角都要能解
+// 四个角都要能解（通用检查：长度与类型）
 ['topLeft', 'topRight', 'bottomLeft', 'bottomRight'].forEach(c => {
     const r = EQW_LayoutSolver.solve({ kind: 'attach', target: 'TARGET', corner: c, w: 20, h: 10 }, { rects: rects });
     t.eq('attach 角 ' + c + ' 可解', r.length === 1 && typeof r[0].x === 'number', true);
 });
 
+// 四角精确坐标核对：target={x:100,y:200,width:80,height:40}，sprite={w:20,h:10}，offset 缺省=0
+// topLeft（AlignmentUtils.js:266-272）：x=target.x=100，y=target.y=200
+const cTopLeft = EQW_LayoutSolver.solve({ kind: 'attach', target: 'TARGET', corner: 'topLeft', w: 20, h: 10 }, { rects: rects });
+t.eq('attach 角 topLeft 精确坐标', cTopLeft, [{ x: 100, y: 200, width: 20, height: 10 }]);
+
+// topRight（AlignmentUtils.js:292-298）：x=target.x+target.width-sprite.width=100+80-20=160，y=target.y=200
+const cTopRight = EQW_LayoutSolver.solve({ kind: 'attach', target: 'TARGET', corner: 'topRight', w: 20, h: 10 }, { rects: rects });
+t.eq('attach 角 topRight 精确坐标', cTopRight, [{ x: 160, y: 200, width: 20, height: 10 }]);
+
+// bottomLeft（AlignmentUtils.js:318-324）：x=target.x=100，y=target.y+target.height-sprite.height=200+40-10=230
+const cBottomLeft = EQW_LayoutSolver.solve({ kind: 'attach', target: 'TARGET', corner: 'bottomLeft', w: 20, h: 10 }, { rects: rects });
+t.eq('attach 角 bottomLeft 精确坐标', cBottomLeft, [{ x: 100, y: 230, width: 20, height: 10 }]);
+
+// bottomRight（AlignmentUtils.js:344-350）：x=target.x+target.width-sprite.width=100+80-20=160，y=同 bottomLeft=230
+const cBottomRight = EQW_LayoutSolver.solve({ kind: 'attach', target: 'TARGET', corner: 'bottomRight', w: 20, h: 10 }, { rects: rects });
+t.eq('attach 角 bottomRight 精确坐标', cBottomRight, [{ x: 160, y: 230, width: 20, height: 10 }]);
+
 // ============ bySeat 合并：列出的覆盖、未列出的继承 ============
 const bySeat = {
     kind: 'fan', direction: 'horizontal', itemWidth: 90, itemHeight: 155,