test: 修复所有已知问题并全面提高测试覆盖率至 90%

KNOWN-007: solarTime.ts 单元测试
KNOWN-008: 消除生产代码中 as any 类型断言
KNOWN-002: 工具层测试覆盖
KNOWN-003: lruCache 边界测试
KNOWN-004: templateService 分支覆盖（100%）
KNOWN-001: 6个业务组件测试
额外修复: searchOptimizer memoize bug, templateService 常量修改 bug

测试覆盖率: 75.71% -> 90.22%, 测试用例: 412 -> 671

everything-is-suitable-uniapp/src/utils/performanceMonitor.ts

@@ -1,3 +1,12 @@
+interface PerformanceMonitorMetric {
+  average: number
+  p95: number
+  p99: number
+  max: number
+  min: number
+  count: number
+}
+
 class PerformanceMonitor {
   private metrics: Map<string, number[]> = new Map()
   private readonly MAX_SAMPLES = 100
@@ -78,8 +87,8 @@ class PerformanceMonitor {
     return Math.min(...samples)
   }
 
-  getMetrics(): Record<string, any> {
-    const result: Record<string, any> = {}
+  getMetrics(): Record<string, PerformanceMonitorMetric> {
+    const result: Record<string, PerformanceMonitorMetric> = {}
     
     for (const [operation, samples] of this.metrics.entries()) {
       result[operation] = {