feat: job status/step flow, file upload, finance sync, notifications

Job lifecycle
  - acceptJobAction (lab): pending → in_progress + currentStep=olcu
  - advanceStepAction (lab): step ilerletir, son adım sonrası status=sent
  - markDeliveredAction (clinic): sent → delivered
  - cancelJobAction: pending iş iptali (her iki taraf)
  - job_status_history her step transition'da idempotent kayıt
  - Detay sayfası interactive panel + Aşama Geçmişi kartı

Job files (Appwrite Storage job-files bucket, 30MB/file)
  - uploadJobFilesAction: çoklu dosya, mimeType'tan kind sınıflandırma
    (scan/image/document), her iki team'e read permission, partial-fail
    rollback (storage + row temizliği)
  - deleteJobFileAction: yetkilendirilmiş silme, file + row birlikte
  - JobFilesPanel: client-side select + upload + liste + indir + sil
  - next.config bodySizeLimit 3mb → 100mb (toplu yükleme için)

Finance sync (idempotent)
  - syncFinanceForJob helper: sent/delivered transition'larında klinik
    payable + lab receivable rows (jobId+tenantId+type unique kontrolü,
    her tarafta tek satır garanti)
  - markFinancePaidAction / reopenFinanceAction: manuel ödendi/geri al
  - /finance sayfası: stat kartlar (bekleyen alacak/borç, aylık gelir/gider)
    + hareketler tablosu, role-aware kopyalar
  - Memory rule [[feedback_cross_entity_sync_helpers]]: best-effort, never
    re-throws

Notifications
  - createNotification helper, connection (request/approve) ve job
    (create/accept/sent/delivered) eventlerinde tetikleniyor
  - /notifications sayfası + tek tek / hepsi okundu işaretle
  - Header'a Bell ikonu + okunmamış count badge (layout SSR'de besler)
  - Middleware PROTECTED_PREFIXES'e /notifications ekli

src/components/site-header.tsx

@@ -1,17 +1,24 @@
 "use client";
 
 import * as React from "react";
-import { Building2, Plus } from "lucide-react";
+import { Bell, Building2, Plus } from "lucide-react";
 import Link from "next/link";
 
 import { ModeToggle } from "@/components/mode-toggle";
+import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
 import { Separator } from "@/components/ui/separator";
 import { SidebarTrigger } from "@/components/ui/sidebar";
 
 import type { ShellCompany } from "@/app/(dashboard)/dashboard-shell";
 
-export function SiteHeader({ company }: { company?: ShellCompany }) {
+export function SiteHeader({
+  company,
+  unreadCount = 0,
+}: {
+  company?: ShellCompany;
+  unreadCount?: number;
+}) {
   const showNewJobCta = company?.kind === "clinic";
 
   return (
@@ -39,6 +46,19 @@ export function SiteHeader({ company }: { company?: ShellCompany }) {
               </Link>
             </Button>
           )}
+          <Button asChild variant="ghost" size="icon" className="relative">
+            <Link href="/notifications" aria-label="Bildirimler">
+              <Bell className="size-4" />
+              {unreadCount > 0 && (
+                <Badge
+                  variant="destructive"
+                  className="absolute -right-1 -top-1 size-4 min-w-4 justify-center rounded-full p-0 text-[10px]"
+                >
+                  {unreadCount > 99 ? "99+" : unreadCount}
+                </Badge>
+              )}
+            </Link>
+          </Button>
           <ModeToggle />
         </div>
       </div>