feat: Implement full type safety plan

supabase/functions/update-novu-subscriber/index.ts

@@ -22,7 +22,15 @@ serve(async (req) => {
       secretKey: novuApiKey 
     });
 
-    const { subscriberId, email, firstName, lastName, phone, avatar, data } = await req.json();
+    const { subscriberId, email, firstName, lastName, phone, avatar, data } = await req.json() as {
+      subscriberId: string;
+      email?: string;
+      firstName?: string;
+      lastName?: string;
+      phone?: string;
+      avatar?: string;
+      data?: Record<string, unknown>;
+    };
 
     console.log('Updating Novu subscriber:', { subscriberId, email, firstName });
 
@@ -47,13 +55,14 @@ serve(async (req) => {
         status: 200,
       }
     );
-  } catch (error: any) {
-    console.error('Error updating Novu subscriber:', error);
+  } catch (error: unknown) {
+    const errorMessage = error instanceof Error ? error.message : 'Unknown error occurred';
+    console.error('Error updating Novu subscriber:', errorMessage);
     
     return new Response(
       JSON.stringify({
         success: false,
-        error: error.message,
+        error: errorMessage,
       }),
       {
         headers: { ...corsHeaders, 'Content-Type': 'application/json' },