feat(client): 新建出入库单默认填充默认仓库（两端，原型同步）

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

design/prototype/screens/stock-in.js

@@ -41,7 +41,8 @@ const CUSTOMERS = [
   ['c3','喜来登酒店','xilaidengjiudian','xldjd','KH003'],['c4','婚庆批发王','hunqingpifawang','hqpfw','KH004'],
   ['c5','社区团购站','shequtuangouzhan','sqtgz','KH005'],
 ].map(a=>({id:a[0],name:a[1],py:a[2],init:a[3],code:a[4]}));
-const WAREHOUSES = [{id:'w1',name:'主仓'},{id:'w2',name:'二号仓'},{id:'w3',name:'冷藏库'}];
+// 2026-07-14：w1(主仓) 标记为默认仓（isDefault），新建单据仓库字段据此预填（真实端 Warehouse.isDefault）。
+const WAREHOUSES = [{id:'w1',name:'主仓',isDefault:true},{id:'w2',name:'二号仓'},{id:'w3',name:'冷藏库'}];
 const ORIGINS=[['o1','贵州茅台镇'],['o2','四川宜宾'],['o3','四川泸州'],['o4','江苏宿迁'],['o5','山西汾阳'],['o6','安徽亳州']].map(a=>({id:a[0],name:a[1],py:'',init:''}));
 const SHELF=[['h1','长期'],['h2','36个月'],['h3','24个月'],['h4','18个月']].map(a=>({id:a[0],name:a[1],py:'',init:''}));
 const STORAGE=[['t1','常温避光'],['t2','阴凉干燥'],['t3','防潮防晒']].map(a=>({id:a[0],name:a[1],py:'',init:''}));
@@ -77,7 +78,10 @@ function reqFields(mode){ return editFields(mode).filter(k=>COLDEF[k].req); }
 
 /* ---------------- 状态 ---------------- */
 let mode='in', status='new';
-const state = { doc:{partner:null,warehouse:null,date:today(),remark:''}, rows:[], docErr:new Set() };
+// 新建单默认填充默认仓库（2026-07-14）：isDefault 的仓 优先；无默认时仅剩 1 个仓才取它；否则留空。
+// 编辑模式不受影响（由单据自身仓库回填，此函数只用于「新建」场景的初值）。
+function defaultWarehouseId(){ const def=WAREHOUSES.find(w=>w.isDefault); if(def) return def.id; return WAREHOUSES.length===1?WAREHOUSES[0].id:null; }
+const state = { doc:{partner:null,warehouse:defaultWarehouseId(),date:today(),remark:''}, rows:[], docErr:new Set() };
 function today(){ const d=new Date(); return d.toISOString().slice(0,10); }
 function newRow(){ return {id:'r'+(++SEQ), name:null,series:null,spec:null,prodDate:'',batch:'',qty:'1',price:'',sale:'',avail:null,expanded:false,origin:null,shelfLife:null,storage:null,doc:null,_err:new Set()}; }
 
@@ -438,7 +442,7 @@ function discardDraft(){ draftClear(); document.getElementById('noticeSlot').inn
 /* ---------------- 退出守卫 ---------------- */
 function exitGuard(){ if(!isDirty()){ resetForm(); toast('已取消'); return; } openOv('未保存的内容', `<div style="font-size:var(--fs-body);color:var(--text);line-height:1.6">当前${MODES[mode].title}尚未提交。是否保存为草稿，以免内容丢失？</div>`, [['继续编辑','ghost','closeOv()'],['放弃','danger','discardAndReset()'],['保存草稿','primary','closeOv();doSubmit(true)']]); }
 function discardAndReset(){ closeOv(); draftClear(); resetForm(); toast('已放弃录入'); }
-function resetForm(){ status='new'; state.doc={partner:null,warehouse:null,date:today(),remark:''}; state.docErr.clear(); state.rows=[newRow()]; setDateField(document.getElementById('orderDate'),state.doc.date); document.getElementById('remark').value=''; document.getElementById('noticeSlot').innerHTML=''; renderActions(); syncDocCombos(); syncDocLock(); refreshSummary(); renderDetail(); updateTotals(); }
+function resetForm(){ status='new'; state.doc={partner:null,warehouse:defaultWarehouseId(),date:today(),remark:''}; state.docErr.clear(); state.rows=[newRow()]; setDateField(document.getElementById('orderDate'),state.doc.date); document.getElementById('remark').value=''; document.getElementById('noticeSlot').innerHTML=''; renderActions(); syncDocCombos(); syncDocLock(); refreshSummary(); renderDetail(); updateTotals(); }
 
 /* ---------------- 模式切换（入库 / 出库镜像）---------------- */
 function switchMode(m){ if(m===mode) return; mode=m; status='new';
@@ -448,7 +452,7 @@ function switchMode(m){ if(m===mode) return; mode=m; status='new';
   document.getElementById('handlerLabel').textContent=MODES[m].handler;
   document.querySelector('.dochead-grid .field:nth-child(2) label').innerHTML=(m==='in'?'入库仓库':'出库仓库')+' <span class="req">*</span>';
   document.getElementById('kbdHint').style.display = m==='in'?'':''; 
-  state.doc={partner:null,warehouse:null,date:today(),remark:''}; state.docErr.clear(); state.rows=[newRow()];
+  state.doc={partner:null,warehouse:defaultWarehouseId(),date:today(),remark:''}; state.docErr.clear(); state.rows=[newRow()];
   setDateField(document.getElementById('orderDate'),state.doc.date); document.getElementById('remark').value='';
   renderActions(); syncDocCombos(); syncDocLock(); refreshSummary(); renderDetail(); updateTotals(); maybeRestore();
 }