feat: 新增风险图谱算法与系统仪表盘及操作反馈体系

后端新增风险图谱算法模块、风险观察与反馈服务、规则 DSL
校验器和可解释性引擎，完善系统仪表盘和财务仪表盘统计，
优化 agent 运行和编排执行链路，清理旧开发文档，前端新增
系统趋势、负载热力图等多种仪表盘图表组件，完善操作反馈
对话框和工作台日期选择器，优化报销创建和审批详情交互，
补充单元测试覆盖。

web/src/assets/styles/views/travel-reimbursement-create-view.css

@@ -24,7 +24,7 @@
   display: flex;
   flex-direction: column;
   border: 0;
-  border-radius: 10px;
+  border-radius: 4px;
   background: transparent;
   box-shadow: none;
   overflow: hidden;
@@ -142,7 +142,7 @@
   background: transparent;
   box-shadow: none;
   border: 0;
-  border-radius: 10px;
+  border-radius: 4px;
   backdrop-filter: none;
   -webkit-backdrop-filter: none;
   overflow: hidden;
@@ -179,9 +179,8 @@
   display: grid;
   grid-template-rows: auto minmax(0, 1fr);
   transform: none;
-  border-radius: 10px;
-  background:
-    linear-gradient(180deg, #f8fbff 0%, #edf5ff 100%);
+  border-radius: 4px;
+  background: #f6f9fc;
   box-shadow:
     0 28px 72px rgba(15, 23, 42, 0.22),
     0 10px 28px rgba(15, 23, 42, 0.09),
@@ -217,7 +216,7 @@
   align-items: center;
   justify-content: center;
   padding: 0 14px;
-  border-radius: 999px;
+  border-radius: 4px;
   background: linear-gradient(135deg, var(--theme-primary), var(--theme-primary-active));
   color: #fff;
   font-size: var(--wb-fs-badge);
@@ -290,7 +289,7 @@
   place-items: center;
   padding: 0;
   border: 1px solid rgba(248, 113, 113, 0.28);
-  border-radius: 14px;
+  border-radius: 4px;
   flex: none;
 }
 
@@ -342,7 +341,7 @@
   padding: 0;
   flex: none;
   border: 1px solid rgba(193, 204, 216, 0.92);
-  border-radius: 14px;
+  border-radius: 4px;
   background: rgba(248, 251, 251, 0.94);
   color: #475569;
   font-size: 16px;
@@ -375,7 +374,7 @@
   align-items: center;
   justify-content: center;
   padding: 0 10px;
-  border-radius: 999px;
+  border-radius: 4px;
   background: #f1f5f9;
   color: #64748b;
   font-size: 11px;
@@ -405,7 +404,7 @@
   place-items: center;
   padding: 0;
   border: 1px solid rgba(203, 213, 225, 0.86);
-  border-radius: 12px;
+  border-radius: 4px;
   background: rgba(255, 255, 255, 0.92);
   color: #475569;
   font-size: 16px;
@@ -493,7 +492,7 @@
   gap: 7px;
   padding: 13px 14px;
   border: 1px solid #e5edf5;
-  border-radius: 12px;
+  border-radius: 4px;
   background: #fff;
   box-shadow: 0 8px 22px rgba(226, 232, 240, 0.34);
 }
@@ -531,7 +530,7 @@
   display: inline-flex;
   align-items: center;
   padding: 0 9px;
-  border-radius: 999px;
+  border-radius: 4px;
   background: #f1f5f9;
   color: #64748b;
   font-size: 11px;
@@ -563,7 +562,6 @@
   font-variant-numeric: tabular-nums;
 }
 
-.flow-step-tool,
 .flow-step-detail,
 .flow-step-error {
   margin: 0;
@@ -632,7 +630,7 @@
   min-width: 0;
   min-height: 0;
   border: 1px solid rgba(189, 201, 214, 0.74);
-  border-radius: 16px;
+  border-radius: 4px;
   background: #ffffff;
   box-shadow:
     0 14px 32px rgba(148, 163, 184, 0.16),
@@ -646,8 +644,7 @@
   display: grid;
   grid-template-rows: auto minmax(0, 1fr) auto;
   overflow: hidden;
-  background:
-    linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
+  background: #ffffff;
   transition:
     transform 320ms cubic-bezier(0.22, 1, 0.36, 1),
     box-shadow 320ms cubic-bezier(0.22, 1, 0.36, 1);
@@ -715,7 +712,7 @@
   gap: 6px;
   padding: 0 13px;
   border: 1px solid rgba(219, 230, 240, 0.9);
-  border-radius: 8px;
+  border-radius: 4px;
   background: rgba(255, 255, 255, 0.95);
   color: #334155;
   font-size: 13px;
@@ -812,7 +809,7 @@
   max-width: min(100%, 720px);
   padding: 12px 14px;
   border: 1px solid rgba(210, 220, 230, 0.94);
-  border-radius: 20px;
+  border-radius: 4px;
   background: rgba(253, 254, 254, 0.94);
   color: #24324a;
   font-size: var(--wb-fs-bubble);
@@ -940,7 +937,7 @@
   margin-top: 12px;
   overflow: hidden;
   border: 1px solid #d7e4f2;
-  border-radius: 8px;
+  border-radius: 4px;
   background: #ffffff;
   color: #334155;
   font-size: var(--wb-fs-bubble);
@@ -1113,7 +1110,7 @@
 .message-answer-markdown :deep(blockquote) {
   padding: 8px 10px;
   border-left: 3px solid #cbd5e1;
-  border-radius: 0 10px 10px 0;
+  border-radius: 0 4px 4px 0;
   background: rgba(248, 250, 252, 0.84);
   color: #475569;
 }
@@ -1123,7 +1120,7 @@
   padding: 12px 14px;
   border: 1px solid #dbe4ee;
   border-left: 4px solid #2563eb;
-  border-radius: 8px;
+  border-radius: 4px;
   background: #f8fafc;
   color: #334155;
 }
@@ -1152,7 +1149,7 @@
 
 .message-answer-markdown :deep(code) {
   padding: 2px 6px;
-  border-radius: 6px;
+  border-radius: 4px;
   background: #e2e8f0;
   font-size: 12px;
 }
@@ -1160,7 +1157,7 @@
 .message-answer-markdown :deep(pre) {
   overflow-x: auto;
   padding: 12px;
-  border-radius: 14px;
+  border-radius: 4px;
   background: #0f172a;
   color: #e2e8f0;
 }
@@ -1218,7 +1215,7 @@
   margin: 8px 0 10px;
   overflow-x: auto;
   border: 1px solid #dbe4ee;
-  border-radius: 10px;
+  border-radius: 4px;
   background: #fff;
   box-shadow: 0 8px 20px rgba(15, 23, 42, 0.05);
 }
@@ -1262,13 +1259,6 @@
   border-bottom: 0;
 }
 
-.message-meta-row {
-  display: flex;
-  flex-wrap: wrap;
-  gap: 8px;
-  margin-top: 10px;
-}
-
 .message-suggested-actions {
   display: grid;
   grid-template-columns: repeat(2, minmax(0, 1fr));
@@ -1276,7 +1266,7 @@
   margin-top: 14px;
   padding: 10px;
   border: 1px solid rgba(203, 213, 225, 0.72);
-  border-radius: 14px;
+  border-radius: 4px;
   background:
     linear-gradient(180deg, rgba(248, 250, 252, 0.92), rgba(255, 255, 255, 0.98));
   box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.78);
@@ -1291,7 +1281,7 @@
   gap: 10px;
   padding: 12px 11px;
   border: 1px solid rgba(203, 213, 225, 0.8);
-  border-radius: 10px;
+  border-radius: 4px;
   background: rgba(255, 255, 255, 0.9);
   color: #0f172a;
   text-align: left;
@@ -1309,7 +1299,7 @@
   height: 34px;
   display: grid;
   place-items: center;
-  border-radius: 10px;
+  border-radius: 4px;
   background: #f1f5f9;
   color: var(--theme-primary-active);
   font-size: 18px;
@@ -1396,7 +1386,6 @@
   opacity: 1;
 }
 
-.message-meta-chip,
 .capability-chip,
 .risk-chip,
 .message-risk-chip,
@@ -1405,35 +1394,16 @@
   display: inline-flex;
   align-items: center;
   padding: 0 10px;
-  border-radius: 999px;
+  border-radius: 4px;
   font-size: var(--wb-fs-chip);
   font-weight: 800;
 }
 
-.message-meta-chip,
 .capability-chip {
   background: #eef6ff;
   color: #1d4ed8;
 }
 
-.message-meta-chip.high {
-  background: #fef2f2;
-  color: #dc2626;
-  border: 1px solid #fecaca;
-}
-
-.message-meta-chip.medium {
-  background: #fffbeb;
-  color: #b45309;
-  border: 1px solid #fde68a;
-}
-
-.message-meta-chip.low {
-  background: #eff6ff;
-  color: #1d4ed8;
-  border: 1px solid #bfdbfe;
-}
-
 .risk-chip,
 .message-risk-chip {
   background: #fff1f2;
@@ -1460,7 +1430,7 @@
 .message-citation-disclosure {
   overflow: hidden;
   border: 1px solid #dbe4ee;
-  border-radius: 16px;
+  border-radius: 4px;
   background: #fbfdff;
 }
 
@@ -1531,7 +1501,7 @@
   display: inline-flex;
   align-items: center;
   padding: 0 10px;
-  border-radius: 999px;
+  border-radius: 4px;
   font-size: 11px;
   font-weight: 800;
   background: #eef2ff;
@@ -1571,7 +1541,7 @@
   gap: 10px;
   padding: 10px 12px;
   border: 1px solid #dbe4ee;
-  border-radius: 14px;
+  border-radius: 4px;
   background: #fbfdff;
   cursor: pointer;
   font: inherit;
@@ -1646,7 +1616,7 @@
   display: inline-flex;
   align-items: center;
   padding: 0 8px;
-  border-radius: 999px;
+  border-radius: 4px;
   font-size: 10px;
   font-weight: 800;
   background: #f1f5f9;
@@ -1698,7 +1668,7 @@
   gap: 5px;
   padding: 0 8px;
   border: 1px solid #fecaca;
-  border-radius: 999px;
+  border-radius: 4px;
   background: #fff7ed;
   color: #9a3412;
   font: inherit;
@@ -1763,7 +1733,7 @@
   align-items: center;
   justify-content: center;
   border: 1px solid #dbe4ee;
-  border-radius: 999px;
+  border-radius: 4px;
   background: #fff;
   color: #475569;
   transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
@@ -1808,7 +1778,7 @@
   gap: 10px;
   padding: 0 14px;
   border: 1px dashed #dbe4ee;
-  border-radius: 16px;
+  border-radius: 4px;
   color: #64748b;
   font-size: 12px;
   font-weight: 700;
@@ -1845,7 +1815,7 @@
 .action-card {
   padding: 12px 14px;
   border: 1px solid #e2e8f0;
-  border-radius: 16px;
+  border-radius: 4px;
   background: #f8fbff;
 }
 
@@ -1887,8 +1857,8 @@
   margin-top: 12px;
   padding: 12px 14px;
   border: 1px solid #dbe3ec;
-  border-radius: 16px;
-  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
+  border-radius: 4px;
+  background: #ffffff;
 }
 
 .draft-preview header {
@@ -1931,7 +1901,7 @@
   gap: 6px;
   padding: 0 10px;
   border: 0;
-  border-radius: 999px;
+  border-radius: 4px;
   background: #f1f5f9;
   color: #475569;
   font-size: 12px;
@@ -1990,7 +1960,7 @@
   gap: 12px;
   padding: 14px;
   border: 1px solid rgba(203, 213, 225, 0.92);
-  border-radius: 16px;
+  border-radius: 4px;
   background: rgba(255, 255, 255, 0.98);
   box-shadow:
     0 18px 40px rgba(15, 23, 42, 0.16),
@@ -2007,7 +1977,7 @@
   gap: 12px;
   padding: 14px;
   border: 1px solid rgba(203, 213, 225, 0.92);
-  border-radius: 16px;
+  border-radius: 4px;
   background: rgba(255, 255, 255, 0.98);
   box-shadow:
     0 18px 40px rgba(15, 23, 42, 0.16),