Use frontend callback for broker reconnect

src/components/landing/BrokerConnectDialog.tsx

@@ -38,6 +38,12 @@ type BrokerStatusResponse = {
 const CALLBACK_STORAGE_KEY = "zerodha:callback";
 const CALLBACK_MAX_AGE_MS = 5 * 60 * 1000;
 
+function buildReconnectRedirectUrl() {
+  const url = new URL(`${window.location.origin}/login`);
+  url.searchParams.set("flow", "reconnect");
+  return url.toString();
+}
+
 export default function BrokerConnectDialog({
   layout = "desktop",
   open,
@@ -100,7 +106,9 @@ export default function BrokerConnectDialog({
 
   const reconnectSavedMutation = useMutation({
     mutationFn: async () => {
-      const res = await apiRequest("GET", "/broker/login-url");
+      const redirectUrl = buildReconnectRedirectUrl();
+      const params = new URLSearchParams({ redirectUrl });
+      const res = await apiRequest("GET", `/broker/login-url?${params.toString()}`);
       return res.json() as Promise<{ loginUrl: string }>;
     },
     onSuccess: ({ loginUrl }) => {

src/components/landing/PortfolioSection.tsx

@@ -148,6 +148,12 @@ function formatRelativeSeconds(seconds: number) {
   return `in ${parts.join(" ")}`;
 }
 
+function buildReconnectRedirectUrl() {
+  const url = new URL(`${window.location.origin}/login`);
+  url.searchParams.set("flow", "reconnect");
+  return url.toString();
+}
+
 function firstNumber(...values: unknown[]) {
   for (const value of values) {
     const parsed = Number(value);
@@ -259,7 +265,9 @@ export default function PortfolioSection() {
 
   async function startSavedBrokerReconnect() {
     try {
-      const res = await apiRequest("GET", "/broker/login-url");
+      const redirectUrl = buildReconnectRedirectUrl();
+      const params = new URLSearchParams({ redirectUrl });
+      const res = await apiRequest("GET", `/broker/login-url?${params.toString()}`);
       const data = (await res.json()) as { loginUrl?: string };
       if (!data?.loginUrl) {
         throw new Error("Reconnect link unavailable.");

src/pages/ZerodhaCallback.tsx

@@ -8,6 +8,7 @@ const CALLBACK_STORAGE_KEY = "zerodha:callback";
 const RETURN_PATH = "/portfolio";
 
 type CallbackParams = {
+  flow: string;
   status: string;
   requestToken: string;
   error: string;
@@ -17,6 +18,7 @@ type CallbackParams = {
 const parseParams = (): CallbackParams => {
   const params = new URLSearchParams(window.location.search);
   return {
+    flow: (params.get("flow") || "").trim(),
     status: (params.get("status") || "").trim(),
     requestToken: (params.get("request_token") || "").trim(),
     error: (params.get("error") || params.get("error_type") || "").trim(),
@@ -48,7 +50,9 @@ export default function ZerodhaCallback() {
       return;
     }
 
-    const url = `/broker/zerodha/callback?request_token=${encodeURIComponent(params.requestToken)}`;
+    const callbackPath =
+      params.flow === "reconnect" ? "/broker/callback" : "/broker/zerodha/callback";
+    const url = `${callbackPath}?request_token=${encodeURIComponent(params.requestToken)}`;
     apiRequest("GET", url)
       .then(() => finalize("success"))
       .catch((err: any) => finalize("error", err?.message || "Unable to complete the login."));