feat: KPI多粒度目标智能派生 — 基准值+按类型派生+手动覆盖

- 后端: target_calc_type字段(accumulate累计/ratio比率) + infer_calc_type名称/单位推断
- 派生规则: 累计型 月×3=季×12=年(季×4=年); 比率型 季/年沿用基准不可乘
- 虚拟派生不落库: kpi_to_dict返回derived_targets+derived_flags(自动标记)
- DB: 302个KPI回填类型(226累计/76比率)
- 前端KPIList: 指标类型选择 + 季/年自动派生预览(↳自动=N)
- 前端KPIDetail: 元数据卡片自动标记 + 编辑表单指标类型
- 回归: pytest 451 passed

frontend/src/views/KPIList.vue

@@ -231,12 +231,18 @@
             <el-form-item label="目标值(月)"><el-input-number v-model="form.target_monthly" :min="0" style="width:100%" /></el-form-item>
           </el-col>
           <el-col :span="12">
-            <el-form-item label="目标值(季)"><el-input-number v-model="form.target_quarterly" :min="0" style="width:100%" /></el-form-item>
+            <el-form-item label="目标值(季)">
+              <el-input-number v-model="form.target_quarterly" :min="0" style="width:100%" />
+              <div v-if="derivedPreview.quarterly !== null" class="derive-hint">↳ 自动={{ derivedPreview.quarterly }}</div>
+            </el-form-item>
           </el-col>
         </el-row>
         <el-row :gutter="20">
           <el-col :span="12">
-            <el-form-item label="目标值(年)"><el-input-number v-model="form.target_yearly" :min="0" style="width:100%" /></el-form-item>
+            <el-form-item label="目标值(年)">
+              <el-input-number v-model="form.target_yearly" :min="0" style="width:100%" />
+              <div v-if="derivedPreview.yearly !== null" class="derive-hint">↳ 自动={{ derivedPreview.yearly }}</div>
+            </el-form-item>
           </el-col>
           <el-col :span="12">
             <el-form-item label="单位"><el-input v-model="form.unit" placeholder="%, 元, 次, 个..." /></el-form-item>
@@ -254,6 +260,16 @@
               </el-select>
             </el-form-item>
           </el-col>
+          <el-col :span="12">
+            <el-form-item label="指标类型">
+              <el-select v-model="form.target_calc_type" style="width:100%">
+                <el-option label="累计型（月×3=季，可乘）" value="accumulate" />
+                <el-option label="比率型（季沿用月，不可乘）" value="ratio" />
+              </el-select>
+            </el-form-item>
+          </el-col>
+        </el-row>
+        <el-row :gutter="20">
           <el-col :span="12">
             <el-form-item label="数据源">
               <el-select v-model="form.data_source_type" style="width:100%">
@@ -495,6 +511,30 @@ const designChecks = computed(() => {
   ]
 })
 
+// ── 多粒度目标派生预览（填基准值后季/年自动提示，与后端 derive_cycle_targets 一致）──
+const derivedPreview = computed(() => {
+  const f = form.value || {}
+  const type = f.target_calc_type || 'ratio'
+  const freq = f.frequency || 'monthly'
+  let base: number | null = null
+  if (freq === 'yearly') base = f.target_yearly
+  else if (freq === 'quarterly' || freq === 'half_year') base = f.target_quarterly
+  else base = f.target_monthly
+  if (base == null) base = f.target_value
+  if (base == null) return { quarterly: null, yearly: null }
+  let q: number | null = f.target_quarterly
+  let y: number | null = f.target_yearly
+  if (type === 'accumulate') {
+    const m: number = f.target_monthly ?? base
+    if (q == null) q = m * 3
+    if (y == null) y = m * 12
+  } else {
+    if (q == null) q = base
+    if (y == null) y = base
+  }
+  return { quarterly: f.target_quarterly == null ? q : null, yearly: f.target_yearly == null ? y : null }
+})
+
 // ── 编辑入口：列表行 → 弹窗编辑（与新建一致）──
 function openEdit(row: any) {
   editMode.value = true
@@ -518,6 +558,7 @@ function openEdit(row: any) {
     threshold_yellow: row.threshold_yellow,
     threshold_red: row.threshold_red,
     epic: row.epic,
+    target_calc_type: row.target_calc_type,
   }
   showForm.value = true
 }
@@ -952,6 +993,12 @@ onMounted(() => {
   color: #E6A23C;
   font-size: 12px;
 }
+.derive-hint {
+  font-size: 12px;
+  color: #409EFF;
+  margin-top: 2px;
+  line-height: 1.4;
+}
 .page-header {
   display: flex;
   justify-content: space-between;