修复前端调试与基础交互问题

frontend/src/features/pool/components/PoolManagementHeader.vue

@@ -216,8 +216,8 @@
 
         <Button
           v-for="action in desktopPostProxyActions"
-          :key="action.key"
           v-show="hasSelectedProvider"
+          :key="action.key"
           variant="ghost"
           size="icon"
           class="h-8 w-8"

frontend/src/features/pool/utils/poolProxyDistribution.ts

@@ -133,7 +133,10 @@ export function buildPoolProxyDistributionPlan(
   }
 
   const assignments = nodeIds.map((nodeId) => {
-    const assignment = mutableAssignments.get(nodeId)!
+    const assignment = mutableAssignments.get(nodeId)
+    if (!assignment) {
+      throw new Error(`Missing proxy distribution assignment for node ${nodeId}`)
+    }
     const nodeKeys = [...assignment.retainedKeys, ...assignment.assignedKeys]
     const changedKeys = nodeKeys.filter(key => getKeyProxyNodeId(key) !== nodeId)
     return {