feat(profile): /settings/account — name, email, password

Replaces template's mock account form with real Appwrite-backed actions.

Server actions (lib/appwrite/profile-actions.ts):
- updateNameAction: account.updateName via session SDK; revalidates layout
  so the new name shows in sidebar/header right away.
- updateEmailAction: account.updateEmail (requires current password as
  Appwrite confirmation). Maps user_email_already_exists to a friendly
  Turkish message.
- updatePasswordAction: account.updatePassword(new, old). Validates
  old != empty, new >= 8 chars, new === confirm. Maps
  user_password_recently_used / user_password_mismatch.
- All audit-logged with entityType user_name / user_email / user_password
  and tenantId of the user's currently-active workspace (or 'global' if
  none). Audit failures swallowed.

UI:
- /settings/account is now an async server page that pulls the user via
  getCurrentUser, renders an account info card ($id, registration date,
  email verification, MFA), then 3 separate small forms — one card each
  — for name, email, password. Each form clears its own state and gives
  toast feedback independently.
- Removed the template's react-hook-form-based mock page.

Side note: skipped email-verification flow + MFA setup for later.

src/app/(dashboard)/settings/account/components/name-form.tsx

@@ -0,0 +1,56 @@
+"use client";
+
+import { useActionState, useEffect } from "react";
+import { Loader2, Save } from "lucide-react";
+import { toast } from "sonner";
+
+import { Button } from "@/components/ui/button";
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+import { updateNameAction } from "@/lib/appwrite/profile-actions";
+import { initialProfileState } from "@/lib/appwrite/profile-types";
+
+export function NameForm({ currentName }: { currentName: string }) {
+  const [state, formAction, isPending] = useActionState(updateNameAction, initialProfileState);
+
+  useEffect(() => {
+    if (state.ok) toast.success("İsim güncellendi.");
+    else if (state.error) toast.error(state.error);
+  }, [state]);
+
+  return (
+    <Card>
+      <CardHeader>
+        <CardTitle>Görünür isim</CardTitle>
+        <CardDescription>
+          Header'da, davetlerde ve takım listesinde görünecek isim.
+        </CardDescription>
+      </CardHeader>
+      <CardContent>
+        <form action={formAction} className="grid gap-4 md:grid-cols-[1fr_auto] md:items-end">
+          <div className="grid gap-2">
+            <Label htmlFor="name">İsim</Label>
+            <Input id="name" name="name" defaultValue={currentName} required maxLength={128} />
+            {state.fieldErrors?.name && (
+              <p className="text-destructive text-xs">{state.fieldErrors.name}</p>
+            )}
+          </div>
+          <Button type="submit" disabled={isPending}>
+            {isPending ? (
+              <>
+                <Loader2 className="size-4 animate-spin" />
+                Kaydediliyor...
+              </>
+            ) : (
+              <>
+                <Save className="size-4" />
+                Kaydet
+              </>
+            )}
+          </Button>
+        </form>
+      </CardContent>
+    </Card>
+  );
+}