Migrate backend from Lovable Cloud to own Supabase (EDU project)

- Point .env + supabase/config.toml at EDU (qgmcpounpkgsjlwosjdi)
- Replace Lovable Google-OAuth shim with native supabase.auth.signInWithOAuth
- Remove src/integrations/lovable and @lovable.dev/cloud-auth-js dependency
- Drop .lovable metadata; gitignore supabase/.temp

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/integrations/lovable/index.ts

@@ -1,38 +0,0 @@
-// This file is auto-generated by Lovable. Do not modify it.
-
-import { createLovableAuth } from "@lovable.dev/cloud-auth-js";
-import { supabase } from "../supabase/client";
-const lovableAuth = createLovableAuth();
-
-type SignInOptions = {
-  redirect_uri?: string;
-  extraParams?: Record<string, string>;
-};
-
-export const lovable = {
-  auth: {
-    signInWithOAuth: async (provider: "google" | "apple" | "microsoft" | "lovable", opts?: SignInOptions) => {
-      const result = await lovableAuth.signInWithOAuth(provider, {
-        redirect_uri: opts?.redirect_uri,
-        extraParams: {
-          ...opts?.extraParams,
-        },
-      });
-
-      if (result.redirected) {
-        return result;
-      }
-
-      if (result.error) {
-        return result;
-      }
-
-      try {
-        await supabase.auth.setSession(result.tokens);
-      } catch (e) {
-        return { error: e instanceof Error ? e : new Error(String(e)) };
-      }
-      return result;
-    },
-  },
-};

src/routeTree.gen.ts

@@ -307,3 +307,13 @@ const rootRouteChildren: RootRouteChildren = {
 export const routeTree = rootRouteImport
   ._addFileChildren(rootRouteChildren)
   ._addFileTypes<FileRouteTypes>()
+
+import type { getRouter } from './router.tsx'
+import type { startInstance } from './start.ts'
+declare module '@tanstack/react-start' {
+  interface Register {
+    ssr: true
+    router: Awaited<ReturnType<typeof getRouter>>
+    config: Awaited<ReturnType<typeof startInstance.getOptions>>
+  }
+}

src/routes/auth.tsx

@@ -2,7 +2,6 @@ import { createFileRoute, useNavigate } from "@tanstack/react-router";
 import { useState } from "react";
 import { z } from "zod";
 import { supabase } from "@/integrations/supabase/client";
-import { lovable } from "@/integrations/lovable";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
@@ -51,9 +50,14 @@ function AuthPage() {
   };
 
   const onGoogle = async () => {
-    const res = await lovable.auth.signInWithOAuth("google", { redirect_uri: window.location.origin });
-    if (res.error) toast.error(res.error.message ?? "Google sign-in failed");
-    else if (!res.redirected) navigate({ to: "/dashboard" });
+    // Native Supabase OAuth: redirects the browser to Google, then back to
+    // redirectTo. supabase-js (detectSessionInUrl) restores the session on
+    // return, and useAuth's onAuthStateChange picks it up.
+    const { error } = await supabase.auth.signInWithOAuth({
+      provider: "google",
+      options: { redirectTo: `${window.location.origin}/dashboard` },
+    });
+    if (error) toast.error(error.message ?? "Google sign-in failed");
   };
 
   return (