feat: admin paneli + blog + testimonials + SEO yöneticisi

Backend altyapısı:
- 4 yeni Appwrite tablosu: blog_posts, testimonials, seo_pages, seo_settings
- Appwrite Storage bucket: kovak-yazilim-media (görsel yüklemeleri)
- Appwrite Auth ile session cookie tabanlı koruma

Admin paneli (/admin):
- Login akışı (email/password) + protected layout
- Dashboard: sayım kartları + hızlı aksiyonlar
- Blog CRUD: markdown content, kapak görseli, draft/published, SEO alanları
- Services CRUD: lucide ikon seçici
- Projects CRUD: teknoloji etiketleri, live URL
- Testimonials CRUD: puanlama
- SEO yöneticisi: global ayarlar + sayfa bazlı override
- Mesaj inbox: status filtreleme + güncelleme
- Medya kütüphanesi: Appwrite Storage upload/delete

Public:
- /blog ve /blog/[slug] sayfaları (markdown render)
- Anasayfaya Testimonials bölümü
- Tüm public sayfalarda generateMetadata + seo_pages override
- Header'a Blog linki

Route yapısı:
- app/(site)/ — public site, Header/Footer ortak
- app/admin/login — auth dışı
- app/admin/(protected)/ — requireUser() korumalı

23 route üretiliyor, public static, admin dynamic.

app/admin/(protected)/referanslar/[id]/edit/page.tsx

@@ -0,0 +1,16 @@
+import { notFound } from "next/navigation";
+import { getRow } from "@/lib/data";
+import { TABLES } from "@/lib/appwrite-server";
+import type { TestimonialRow } from "@/lib/types";
+import { TestimonialForm } from "../../form";
+
+export default async function EditTestimonialPage({
+  params,
+}: {
+  params: Promise<{ id: string }>;
+}) {
+  const { id } = await params;
+  const row = await getRow<TestimonialRow>(TABLES.testimonials, id);
+  if (!row) notFound();
+  return <TestimonialForm row={row} />;
+}

app/admin/(protected)/referanslar/form.tsx

@@ -0,0 +1,64 @@
+import { Save } from "lucide-react";
+import {
+  Checkbox,
+  Field,
+  FormActions,
+  FormShell,
+  GhostLink,
+  PageHeader,
+  PrimaryButton,
+  Textarea,
+} from "@/components/admin/form";
+import { saveTestimonial } from "@/lib/admin-actions";
+import type { TestimonialRow } from "@/lib/types";
+
+export function TestimonialForm({ row }: { row?: TestimonialRow }) {
+  return (
+    <div>
+      <PageHeader
+        title={row ? "Referansı düzenle" : "Yeni referans"}
+        backHref="/admin/referanslar"
+      />
+      <form action={saveTestimonial}>
+        {row && <input type="hidden" name="id" value={row.$id} />}
+        <FormShell>
+          <div className="grid gap-5 md:grid-cols-2">
+            <Field label="İsim" name="name" required defaultValue={row?.name} />
+            <Field label="Görsel URL" name="image_url" type="url" defaultValue={row?.image_url} />
+            <Field label="Pozisyon" name="role" defaultValue={row?.role} />
+            <Field label="Firma" name="company" defaultValue={row?.company} />
+            <Field
+              label="Puan (1–5)"
+              name="rating"
+              type="number"
+              defaultValue={row?.rating ?? 5}
+            />
+            <Field label="Sıra" name="order" type="number" defaultValue={row?.order ?? 0} />
+          </div>
+          <div className="mt-5">
+            <Textarea
+              label="Yorum"
+              name="message"
+              required
+              rows={5}
+              defaultValue={row?.message}
+            />
+          </div>
+          <div className="mt-5">
+            <Checkbox
+              label="Öne çıkar"
+              name="featured"
+              defaultChecked={row?.featured ?? false}
+            />
+          </div>
+          <FormActions>
+            <GhostLink href="/admin/referanslar">İptal</GhostLink>
+            <PrimaryButton>
+              <Save className="size-4" /> Kaydet
+            </PrimaryButton>
+          </FormActions>
+        </FormShell>
+      </form>
+    </div>
+  );
+}

app/admin/(protected)/referanslar/new/page.tsx

@@ -0,0 +1,5 @@
+import { TestimonialForm } from "../form";
+
+export default function NewTestimonialPage() {
+  return <TestimonialForm />;
+}

app/admin/(protected)/referanslar/page.tsx

@@ -0,0 +1,73 @@
+import Link from "next/link";
+import { Plus, Edit, Star } from "lucide-react";
+import { PageHeader } from "@/components/admin/form";
+import { DeleteButton } from "@/components/admin/delete-button";
+import { listTestimonials } from "@/lib/data";
+import { deleteTestimonial } from "@/lib/admin-actions";
+
+export default async function TestimonialsAdminPage() {
+  const items = await listTestimonials();
+  return (
+    <div>
+      <PageHeader
+        title="Referanslar"
+        description="Müşteri yorumları ve değerlendirmeleri."
+        action={
+          <Link
+            href="/admin/referanslar/new"
+            className="inline-flex items-center gap-2 rounded-full bg-[var(--navy)] px-4 py-2 text-sm font-medium text-white transition hover:bg-[var(--navy-700)]"
+          >
+            <Plus className="size-4" /> Yeni referans
+          </Link>
+        }
+      />
+      <div className="mt-6 grid gap-4 md:grid-cols-2">
+        {items.length === 0 && (
+          <div className="md:col-span-2 rounded-2xl border border-dashed border-[var(--border)] bg-white p-12 text-center text-sm text-[var(--muted)]">
+            Henüz referans eklenmemiş.
+          </div>
+        )}
+        {items.map((t) => (
+          <div
+            key={t.$id}
+            className="rounded-2xl border border-[var(--border)] bg-white p-5"
+          >
+            <div className="flex items-start justify-between">
+              <div>
+                <p className="text-base font-semibold text-[var(--navy)]">{t.name}</p>
+                <p className="text-xs text-[var(--muted)]">
+                  {[t.role, t.company].filter(Boolean).join(" — ") || "—"}
+                </p>
+              </div>
+              <div className="flex items-center gap-0.5 text-amber-500">
+                {Array.from({ length: t.rating ?? 5 }).map((_, i) => (
+                  <Star key={i} className="size-3.5 fill-current" />
+                ))}
+              </div>
+            </div>
+            <p className="mt-3 text-sm leading-relaxed text-[var(--foreground)] line-clamp-4">
+              “{t.message}”
+            </p>
+            <div className="mt-4 flex items-center justify-between border-t border-[var(--border)] pt-3">
+              <span className="text-xs text-[var(--muted)]">
+                Sıra: {t.order ?? 0} {t.featured && "• Öne çıkan"}
+              </span>
+              <div className="flex items-center gap-2">
+                <Link
+                  href={`/admin/referanslar/${t.$id}/edit`}
+                  className="inline-flex items-center gap-1 rounded-md border border-[var(--border)] bg-white px-2.5 py-1.5 text-xs font-medium text-[var(--navy)] hover:bg-[var(--navy-50)]"
+                >
+                  <Edit className="size-3.5" /> Düzenle
+                </Link>
+                <form action={deleteTestimonial}>
+                  <input type="hidden" name="id" value={t.$id} />
+                  <DeleteButton />
+                </form>
+              </div>
+            </div>
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}