Fix endpoint condition source handling

frontend/src/api/endpoints/types/provider.ts

@@ -140,7 +140,7 @@ export interface BodyRuleConditionLeaf {
   path: string
   op: BodyRuleConditionOp
   value?: unknown  // exists / not_exists 不需要 value
-  source?: 'request_headers'  // 不填表示请求体；填 request_headers 表示请求头
+  source?: 'body' | 'current' | 'original' | 'request_headers' | 'headers'
 }
 
 export interface BodyRuleConditionAll {

frontend/src/features/providers/components/EndpointConditionEditor.vue

@@ -130,6 +130,9 @@
           <SelectItem value="body">
             请求体
           </SelectItem>
+          <SelectItem value="original">
+            原始请求体
+          </SelectItem>
           <SelectItem value="request_headers">
             请求头
           </SelectItem>

frontend/src/features/providers/components/EndpointFormDialog.vue

@@ -1459,6 +1459,7 @@ const RESERVED_BODY_FIELDS = new Set([
 
 const BODY_RULE_JSON_ACTIONS = new Set(['set', 'drop', 'rename', 'append', 'insert', 'regex_replace'])
 const CONDITION_JSON_OPS = new Set(['eq', 'neq', 'gt', 'lt', 'gte', 'lte', 'starts_with', 'ends_with', 'contains', 'matches', 'exists', 'not_exists', 'in', 'type_is'])
+const CONDITION_JSON_SOURCES = new Set(['body', 'current', 'original', 'request_headers', 'headers'])
 
 function isJsonObject(value: unknown): value is Record<string, unknown> {
   return value !== null && typeof value === 'object' && !Array.isArray(value)
@@ -1508,8 +1509,8 @@ function validateJsonConditionShape(condition: Record<string, unknown>, label: s
   if (typeof condition.op !== 'string' || !CONDITION_JSON_OPS.has(condition.op)) {
     return `${label}.op 无效`
   }
-  if (condition.source !== undefined && condition.source !== 'request_headers') {
-    return `${label}.source 只能是 request_headers；请求体条件不要填写 source`
+  if (condition.source !== undefined && (typeof condition.source !== 'string' || !CONDITION_JSON_SOURCES.has(condition.source))) {
+    return `${label}.source 无效`
   }
   return null
 }

frontend/src/features/providers/components/endpoint-rule-condition.ts

@@ -1,6 +1,6 @@
 import type { BodyRuleCondition, BodyRuleConditionOp } from '@/api/endpoints'
 
-export type ConditionSource = 'body' | 'request_headers'
+export type ConditionSource = 'body' | 'original' | 'request_headers'
 export type ConditionGroupMode = 'all' | 'any'
 
 export interface EditableConditionLeaf {
@@ -96,6 +96,8 @@ export function conditionToEditable(condition?: BodyRuleCondition | null): Edita
       : '',
     source: source === 'request_headers' || source === 'headers'
         ? 'request_headers'
+        : source === 'original'
+          ? 'original'
         : 'body',
   }
 }
@@ -117,7 +119,11 @@ export function editableConditionToApi(node: EditableConditionNode | null): Body
   const base = {
     path,
     op: node.op,
-    ...(node.source === 'request_headers' ? { source: 'request_headers' as const } : {}),
+    ...(node.source === 'request_headers'
+      ? { source: 'request_headers' as const }
+      : node.source === 'original'
+        ? { source: 'original' as const }
+        : {}),
   }
 
   if (node.op === 'exists' || node.op === 'not_exists') {