refactor(SW-360): improve error handling logic

actions/registerUser.ts

@@ -1,5 +1,6 @@
 "use server"
 
+import { redirect } from "next/navigation"
 import { z } from "zod"
 
 import * as api from "@/lib/api"
@@ -45,7 +46,7 @@ export const registerUser = profileServiceServerActionProcedure
         })
       )
 
-      return false
+      return { success: false, error: "Validation error" }
     }
 
     try {
@@ -57,7 +58,7 @@ export const registerUser = profileServiceServerActionProcedure
       })
 
       if (!apiResponse.ok) {
-        const text = apiResponse.text()
+        const text = await apiResponse.text()
         console.error(
           "registerUser api error",
           JSON.stringify({
@@ -69,14 +70,16 @@ export const registerUser = profileServiceServerActionProcedure
             },
           })
         )
-        return false
+        return { success: false, error: "API error" }
       }
 
       const json = await apiResponse.json()
       console.log("json", json)
 
-      return true
+      // TODO: Redirect to actual success page.
+      redirect("/signup/success")
     } catch (error) {
-      return false
+      console.error("Unexpected error", error)
+      return { success: false, error: "Unexpected error" }
     }
   })