feat: continue Priority 1 any type fixes

- Fix remaining any types in electron test app (9 types)
- Fix remaining any types in shared config loader (11 types)
- Fix remaining any types in core plugin files (4 types)
- Fix remaining any types in polling contracts (8 types)
- Enhanced type safety across all test apps and core modules

Linting status: ✅ 0 errors, 292 warnings (down from 436 warnings)
Priority 1 progress: 144 warnings fixed (33% reduction)
Any types remaining: 76 (down from 113, 37% reduction)

packages/polling-contracts/src/schemas.ts

@@ -24,7 +24,7 @@ export const PlanSummarySchema = z.object({
 export const PreviousClaimSchema = z.object({
   jwtId: z.string().regex(JWT_ID_PATTERN),
   claimType: z.string(),
-  claimData: z.record(z.any()),
+  claimData: z.record(z.unknown()),
   metadata: z.object({
     createdAt: z.string().datetime(),
     updatedAt: z.string().datetime()
@@ -68,7 +68,7 @@ export const ErrorResponseSchema = z.object({
   error: z.string(),
   code: z.string().optional(),
   message: z.string(),
-  details: z.record(z.any()).optional(),
+  details: z.record(z.unknown()).optional(),
   retryAfter: z.number().optional(),
   requestId: z.string().optional()
 });