feat: 项目管理重构汇总区+新增应付列+公式卡片

- 汇总区改为7指标卡片(签约/确收/毛利/应收/应付/现金流/往来余额)
- 表格新增应付列(成本-支出), 待回款→应收, 剩余应付→应付
- 每张卡片增加计算公式说明
- 汇总区与表格拆分为独立卡片
- 金额改为整数显示(不保留小数)
- 版本号 v1.2.0.35

templates/index.html

@@ -84,7 +84,7 @@
     <header class="topbar border-b border-slate-200 bg-white px-8 py-5">
       <div class="flex items-center gap-3 w-full">
         <div class="flex-1">
-          <p class="eyebrow text-xs font-semibold uppercase tracking-[0.18em] text-blue-700">OPC Manager <span class="ml-2 text-xs font-normal text-slate-400 tracking-normal">v1.2.0.34</span></p>
+          <p class="eyebrow text-xs font-semibold uppercase tracking-[0.18em] text-blue-700">OPC Manager <span class="ml-2 text-xs font-normal text-slate-400 tracking-normal">v1.2.0.35</span></p>
           <div class="flex items-center gap-4 mt-1">
             <h1 class="text-2xl font-semibold" id="workspaceTitle">科普 OPC 工作台</h1>
             <div class="hidden sm:flex items-center gap-1.5 bg-gradient-to-r from-blue-50 to-indigo-50 border border-blue-100 rounded-full px-4 py-1.5">