refactor: convert password change to Server Action

- Add src/app/actions/password.ts with changePassword
- Update ChangePasswordForm to use Server Action
- Remove api/user/password route (entire file)

src/app/api/user/password/route.ts

@@ -1,52 +0,0 @@
-import { NextRequest, NextResponse } from "next/server";
-import { UserService } from "@/lib/services/user.service";
-import { AppError } from "@/utils/errors";
-import { AuthServerService } from "@/lib/services/auth-server.service";
-import logger from "@/lib/logger";
-
-export async function PUT(request: NextRequest) {
-  try {
-    const body = await request.json();
-    const { currentPassword, newPassword } = body;
-
-    if (!currentPassword || !newPassword) {
-      return NextResponse.json({ error: "Mots de passe manquants" }, { status: 400 });
-    }
-
-    // Vérifier que le nouveau mot de passe est fort
-    if (!AuthServerService.isPasswordStrong(newPassword)) {
-      return NextResponse.json(
-        {
-          error:
-            "Le nouveau mot de passe doit contenir au moins 8 caractères, une majuscule et un chiffre",
-        },
-        { status: 400 }
-      );
-    }
-
-    await UserService.changePassword(currentPassword, newPassword);
-
-    return NextResponse.json({ success: true });
-  } catch (error) {
-    logger.error({ err: error }, "Erreur lors du changement de mot de passe:");
-
-    if (error instanceof AppError) {
-      return NextResponse.json(
-        { error: error.message, code: error.code },
-        {
-          status:
-            error.code === "AUTH_INVALID_PASSWORD"
-              ? 400
-              : error.code === "AUTH_UNAUTHENTICATED"
-                ? 401
-                : 500,
-        }
-      );
-    }
-
-    return NextResponse.json(
-      { error: "Erreur lors du changement de mot de passe" },
-      { status: 500 }
-    );
-  }
-}