fix: footer rebrand + iç sayfada genel-bakış'a yanlış redirect

1) Footer

The template's 'Made with ❤ by ShadcnStore Team' is gone. Footer now
shows '© <year> İşletmem — bir KovakSoft ürünüdür.' on the left and
Kullanım şartları / Gizlilik links on the right. Compact one-line layout
on desktop, stacked on mobile.

2) Internal pages were redirecting users to /onboarding (and from there
   to /dashboard) even when they had a valid tenant.

Root cause: requireTenant() called getActiveTenantId() and threw
NO_TENANT when the active-tenant cookie/prefs were missing — even though
the user's actually a member of one or more teams. getActiveContext()
already handled this fallback for the layout, but the per-page
requireTenant() guard didn't, so /customers, /tasks, /invoices, etc. all
bounced through /onboarding back to /dashboard.

- requireTenant() now falls back to the user's first team via
  teams.list(), and writes the cookie so the next request is fast.

3) Side fix: acceptInviteAction now sets account.prefs.activeTenant + the
   ACTIVE_TENANT cookie after successful join, so a freshly invited
   member lands directly in the right workspace instead of relying on
   the team-list fallback.

src/components/site-footer.tsx

@@ -1,27 +1,32 @@
-import { Heart } from "lucide-react"
 import Link from "next/link"
 
 export function SiteFooter() {
+  const year = new Date().getFullYear()
   return (
-    <footer className="border-t bg-background">
-      <div className="px-4 py-6 lg:px-6">
-        <div className="flex flex-col items-center justify-center space-y-2 text-center">
-          <div className="flex items-center space-x-2 text-sm text-muted-foreground">
-            <span>Made with</span>
-            <Heart className="h-4 w-4 fill-red-500 text-red-500" />
-            <span>by</span>
+    <footer className="bg-background border-t">
+      <div className="px-4 py-4 lg:px-6">
+        <div className="text-muted-foreground flex flex-col items-center justify-between gap-2 text-xs sm:flex-row">
+          <p>
+            © {year} İşletmem — bir{" "}
             <Link
-              href="https://shadcnstore.com"
+              href="https://kovaksoft.com"
               target="_blank"
               rel="noopener noreferrer"
-              className="font-medium text-foreground hover:text-primary transition-colors"
+              className="text-foreground hover:text-primary font-medium transition-colors"
             >
-              ShadcnStore Team
+              KovakSoft
+            </Link>{" "}
+            ürünüdür.
+          </p>
+          <div className="flex items-center gap-3">
+            <Link href="#" className="hover:text-foreground transition-colors">
+              Kullanım şartları
+            </Link>
+            <span aria-hidden>·</span>
+            <Link href="#" className="hover:text-foreground transition-colors">
+              Gizlilik
             </Link>
           </div>
-          <p className="text-xs text-muted-foreground">
-            Building beautiful, accessible blocks, templates and dashboards for modern web applications.
-          </p>
         </div>
       </div>
     </footer>

src/lib/appwrite/team-actions.ts

@@ -1,5 +1,6 @@
 "use server";
 
+import { cookies } from "next/headers";
 import { revalidatePath } from "next/cache";
 import { AppwriteException, ID, Permission, Query, Role } from "node-appwrite";
 
@@ -8,6 +9,7 @@ import { DATABASE_ID, TABLES, type InviteLink, type InviteRole } from "./schema"
 import { createAdminClient, createSessionClient } from "./server";
 import { requireRole, requireTenant } from "./tenant-guard";
 import type { InviteState, MemberActionState } from "./team-types";
+import { ACTIVE_TENANT_COOKIE } from "./tenant-types";
 
 const APP_URL = process.env.APP_URL ?? "http://localhost:3000";
 const INVITE_TTL_DAYS = 7;
@@ -306,7 +308,7 @@ export async function resolveInviteCode(code: string): Promise<InviteLink | null
 export async function acceptInviteAction(code: string): Promise<MemberActionState> {
   if (!code) return { ok: false, error: "Geçersiz davet linki." };
 
-  let user;
+  let user: Awaited<ReturnType<Awaited<ReturnType<typeof createSessionClient>>["account"]["get"]>>;
   try {
     const session = await createSessionClient();
     user = await session.account.get();
@@ -331,6 +333,30 @@ export async function acceptInviteAction(code: string): Promise<MemberActionStat
 
   const admin = createAdminClient();
 
+  const activeTenantId = invite.tenantId;
+  async function activateTenant() {
+    try {
+      const session = await createSessionClient();
+      await session.account.updatePrefs({
+        ...(user.prefs ?? {}),
+        activeTenant: activeTenantId,
+      });
+    } catch {
+      /* ignore */
+    }
+    try {
+      (await cookies()).set(ACTIVE_TENANT_COOKIE, activeTenantId, {
+        path: "/",
+        httpOnly: true,
+        sameSite: "strict",
+        secure: process.env.NODE_ENV === "production",
+        maxAge: 60 * 60 * 24 * 365,
+      });
+    } catch {
+      /* ignore */
+    }
+  }
+
   // Already a member? Mark accepted, redirect.
   try {
     const memberships = await admin.teams.listMemberships(invite.tenantId);
@@ -341,6 +367,7 @@ export async function acceptInviteAction(code: string): Promise<MemberActionStat
         acceptedAt: new Date().toISOString(),
         acceptedBy: user.$id,
       });
+      await activateTenant();
       return { ok: true };
     }
   } catch {
@@ -369,6 +396,8 @@ export async function acceptInviteAction(code: string): Promise<MemberActionStat
       entityId: invite.$id,
       changes: { via: "invite", code },
     });
+
+    await activateTenant();
   } catch (e) {
     return { ok: false, error: appwriteError(e) };
   }

src/lib/appwrite/tenant-guard.ts

@@ -1,10 +1,12 @@
 import "server-only";
 
+import { cookies } from "next/headers";
 import { Query } from "node-appwrite";
 
 import { createAdminClient, getCurrentUser } from "./server";
 import { DATABASE_ID, TABLES, type TenantSettings } from "./schema";
-import { getActiveTenantId } from "./tenant";
+import { ACTIVE_TENANT_COOKIE } from "./tenant-types";
+import { getActiveTenantId, getUserTeams } from "./tenant";
 
 export type TenantRole = "owner" | "admin" | "member";
 
@@ -26,7 +28,26 @@ export async function requireTenant(): Promise<TenantContext> {
   const user = await getCurrentUser();
   if (!user) throw new Error("UNAUTHENTICATED");
 
-  const tenantId = await getActiveTenantId();
+  let tenantId = await getActiveTenantId();
+  if (!tenantId) {
+    // Fallback: pick the user's first team (handles invite acceptees and
+    // sessions where the active-tenant cookie/prefs weren't set yet).
+    const userTeams = await getUserTeams();
+    tenantId = userTeams?.teams[0]?.$id ?? null;
+    if (tenantId) {
+      try {
+        (await cookies()).set(ACTIVE_TENANT_COOKIE, tenantId, {
+          path: "/",
+          httpOnly: true,
+          sameSite: "strict",
+          secure: process.env.NODE_ENV === "production",
+          maxAge: 60 * 60 * 24 * 365,
+        });
+      } catch {
+        /* setting cookie can fail in some Server Component paths; ignore */
+      }
+    }
+  }
   if (!tenantId) throw new Error("NO_TENANT");
 
   const { tablesDB, teams } = createAdminClient();