refactor(config): rename providerPresets to claudeProviderPresets

- Rename src/config/providerPresets.ts to claudeProviderPresets.ts
- Update all import statements across 11 files to reflect the new name
- Establish symmetrical naming convention with codexProviderPresets.ts
- Improve code clarity and maintainability

src/components/providers/forms/ClaudeFormFields.tsx

@@ -4,7 +4,7 @@ import { Input } from "@/components/ui/input";
 import EndpointSpeedTest from "./EndpointSpeedTest";
 import { ApiKeySection, EndpointField } from "./shared";
 import type { ProviderCategory } from "@/types";
-import type { TemplateValueConfig } from "@/config/providerPresets";
+import type { TemplateValueConfig } from "@/config/claudeProviderPresets";
 
 interface EndpointCandidate {
   url: string;