feat: implement trial period for checkout sessions and enforce team plan member limit

Added a 14-day trial period for the "solo" and "team" plans during checkout session creation. Also, enforced a member limit of 3 for the "team" plan in the user invitation process and updated the settings page to reflect this limit with appropriate messaging.

apps/api/src/routers/stripe.ts

@@ -293,6 +293,9 @@ const createCheckoutSession = (
         customerId = customer.id;
       }
 
+      const TRIAL_PERIOD_DAYS = 14;
+      const planHasTrial = plan === "solo" || plan === "team";
+
       const session = await stripe.checkout.sessions.create({
         customer: customerId,
         line_items: [
@@ -315,6 +318,7 @@ const createCheckoutSession = (
             organization_id: String(ownerContext.organizationId),
             checkout_plan: plan ?? "legacy_price",
           },
+          ...(planHasTrial && { trial_period_days: TRIAL_PERIOD_DAYS }),
         },
       });
 

apps/api/src/routers/user.ts

@@ -531,6 +531,20 @@ const inviteToOrganization = factory.createHandlers(async (c) => {
     return c.json({ error: "This email already belongs to another organization" }, 409);
   }
 
+  const TEAM_PLAN_MEMBER_LIMIT = 3;
+
+  if (
+    billingState.active_subscription_plan === "team" &&
+    billingState.member_count >= TEAM_PLAN_MEMBER_LIMIT
+  ) {
+    return c.json(
+      {
+        error: `The Teams plan is limited to ${TEAM_PLAN_MEMBER_LIMIT} members per organization. Upgrade to the Founder plan to add unlimited members.`,
+      },
+      403
+    );
+  }
+
   if (billingState.is_trial_expired && billingState.active_subscription_plan !== "annual") {
     const requiredSeatsForInvite = billingState.member_count + 1;
 

apps/main/src/pages/settings.tsx

@@ -80,6 +80,10 @@ export default function SettingsPage() {
   );
 
   const canManageMembers = organizationData?.is_billing_owner ?? false;
+  const TEAM_PLAN_MEMBER_LIMIT = 3;
+  const isAtTeamMemberLimit =
+    organizationData?.active_subscription_plan === "team" &&
+    (organizationData?.organization?.member_count ?? 0) >= TEAM_PLAN_MEMBER_LIMIT;
 
   const getDisplayName = (input: {
     first_name?: string | null;
@@ -419,13 +423,21 @@ export default function SettingsPage() {
                   value={inviteEmail}
                   onChange={(e) => setInviteEmail(e.target.value)}
                   placeholder={t("settings:teamInvite.emailPlaceholder")}
+                  disabled={isAtTeamMemberLimit}
                 />
-                <p className="text-xs text-muted-foreground">{t("settings:teamInvite.hint")}</p>
+                {isAtTeamMemberLimit ? (
+                  <p className="text-xs text-amber-600 dark:text-amber-400">
+                    Le plan Teams est limité à {TEAM_PLAN_MEMBER_LIMIT} membres. Passez au plan
+                    Founder pour ajouter des membres illimités.
+                  </p>
+                ) : (
+                  <p className="text-xs text-muted-foreground">{t("settings:teamInvite.hint")}</p>
+                )}
               </div>
 
               <div className="flex justify-end">
                 <Button
-                  disabled={inviteOrganizationUserPending || !inviteEmail.trim()}
+                  disabled={inviteOrganizationUserPending || !inviteEmail.trim() || isAtTeamMemberLimit}
                   onClick={() => {
                     inviteOrganizationUser(inviteEmail.trim());
                     setInviteEmail("");

apps/main/src/pages/signup-v2.tsx

@@ -8,12 +8,17 @@ import { Label } from "@xtablo/ui/components/label";
 import { ArrowLeftIcon, MonitorIcon, MoonIcon, SparklesIcon, SunIcon } from "lucide-react";
 import { useState } from "react";
 import { useTranslation } from "react-i18next";
-import { Link } from "react-router-dom";
+import { Link, useSearchParams } from "react-router-dom";
 import { useSignUp } from "../hooks/auth";
-import { DEFAULT_SIGNUP_BILLING_INTENT, type SignupBillingIntent } from "../lib/billing";
+import {
+  DEFAULT_SIGNUP_BILLING_INTENT,
+  isSignupBillingIntent,
+  type SignupBillingIntent,
+} from "../lib/billing";
 
 export function SignUpV2Page() {
   const { t } = useTranslation(["auth", "common"]);
+  const [searchParams] = useSearchParams();
   const redirectUrl = localStorage.getItem("redirectUrl");
   const { mutate: signUp, isPending } = useSignUp({
     redirectUrl: redirectUrl ?? null,
@@ -30,8 +35,9 @@ export function SignUpV2Page() {
     business_name: "",
   });
   const [termsAccepted, setTermsAccepted] = useState(false);
+  const planParam = searchParams.get("plan");
   const [billingIntent, setBillingIntent] = useState<SignupBillingIntent>(
-    DEFAULT_SIGNUP_BILLING_INTENT
+    isSignupBillingIntent(planParam) ? planParam : DEFAULT_SIGNUP_BILLING_INTENT
   );
 
   const { theme, setTheme } = useTheme();

apps/main/src/pages/signup.tsx

@@ -8,13 +8,18 @@ import { Label } from "@xtablo/ui/components/label";
 import { MonitorIcon, MoonIcon, SunIcon } from "lucide-react";
 import { useRef, useState } from "react";
 import { useTranslation } from "react-i18next";
-import { Link } from "react-router-dom";
+import { Link, useSearchParams } from "react-router-dom";
 import { twMerge } from "tailwind-merge";
 import { useSignUp } from "../hooks/auth";
-import { DEFAULT_SIGNUP_BILLING_INTENT, type SignupBillingIntent } from "../lib/billing";
+import {
+  DEFAULT_SIGNUP_BILLING_INTENT,
+  isSignupBillingIntent,
+  type SignupBillingIntent,
+} from "../lib/billing";
 
 export function SignUpPage() {
   const { t } = useTranslation(["auth", "common"]);
+  const [searchParams] = useSearchParams();
   const redirectUrl = localStorage.getItem("redirectUrl");
   const { mutate: signUp, isPending } = useSignUp({
     redirectUrl: redirectUrl ?? null,
@@ -31,8 +36,9 @@ export function SignUpPage() {
     business_name: "",
   });
   const [termsAccepted, setTermsAccepted] = useState(false);
+  const planParam = searchParams.get("plan");
   const [billingIntent, setBillingIntent] = useState<SignupBillingIntent>(
-    DEFAULT_SIGNUP_BILLING_INTENT
+    isSignupBillingIntent(planParam) ? planParam : DEFAULT_SIGNUP_BILLING_INTENT
   );
 
   // 3D Parallax effect