Build fixes: offline-safe fonts, Next.js API route type updates, TS strict errors resolved, MUI import cleanup, chat markdown wrapper, Azure OpenAI typing, caching key + chapter API id types, and misc error-logging typings.

lib/auth/index.ts

@@ -28,7 +28,7 @@ export async function verifyToken(token: string) {
     console.log('Server: Token verification successful, userId:', payload.userId)
     return payload
   } catch (error) {
-    console.log('Server: Token verification failed:', error.message)
+    console.log('Server: Token verification failed:', (error as any)?.message || error)
     throw new Error('Invalid token')
   }
 }
@@ -54,7 +54,7 @@ export async function getUserFromToken(token: string) {
     }
     return user
   } catch (error) {
-    console.log('Server: getUserFromToken error:', error.message)
+    console.log('Server: getUserFromToken error:', (error as any)?.message || error)
     return null
   }
 }
@@ -69,4 +69,4 @@ export function isTokenExpired(token: string): boolean {
   } catch (error) {
     return true
   }
-}
+}