refactor: remove api-types.ts compatibility layer

- Migrated all 29 files from api-types.ts to use reflector-api.d.ts directly
- Removed $SourceKind manual enum in favor of OpenAPI-generated types
- Fixed unrelated Spinner component TypeScript error in AuthWrapper.tsx
- All imports now use: import type { components } from "path/to/reflector-api"
- Deleted api-types.ts file completely

www/app/(app)/transcripts/transcriptTitle.tsx

@@ -1,5 +1,7 @@
 import { useState } from "react";
-import { UpdateTranscript } from "../../lib/api-types";
+import type { components } from "../../reflector-api";
+
+type UpdateTranscript = components["schemas"]["UpdateTranscript"];
 import { useTranscriptUpdate } from "../../lib/api-hooks";
 import { Heading, IconButton, Input, Flex, Spacer } from "@chakra-ui/react";
 import { LuPen } from "react-icons/lu";