feat: T03+T04 backend - FastAPI, DB models, Rentman integration, admin auth, APScheduler

backend/app/schemas/__init__.py

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+"""Schema exports."""

backend/app/schemas/auth.py

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+"""Pydantic schemas for admin auth."""
+from pydantic import BaseModel
+
+
+class LoginRequest(BaseModel):
+    username: str
+    password: str
+
+
+class TokenResponse(BaseModel):
+    access_token: str
+    token_type: str = "bearer"
+
+
+class AdminInfo(BaseModel):
+    username: str

backend/app/schemas/contact.py

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+"""Pydantic schema for contact form."""
+from pydantic import BaseModel, EmailStr, field_validator
+
+
+class ContactCreate(BaseModel):
+    name: str
+    email: EmailStr
+    phone: str | None = None
+    message: str
+    privacy_consent: bool
+
+    @field_validator("privacy_consent")
+    @classmethod
+    def consent_must_be_true(cls, v: bool) -> bool:
+        if not v:
+            raise ValueError("privacy_consent must be True")
+        return v
+
+
+class ContactResponse(BaseModel):
+    success: bool

backend/app/schemas/equipment.py

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+"""Pydantic schemas for equipment endpoints."""
+from pydantic import BaseModel
+from decimal import Decimal
+from typing import Any
+
+
+class EquipmentItem(BaseModel):
+    id: int
+    rentman_id: str
+    name: str
+    number: str | None = None
+    category: str | None = None
+    description: str | None = None
+    image_url: str | None = None
+    rental_price: Decimal | None = None
+    available: bool = True
+
+    model_config = {"from_attributes": True}
+
+
+class EquipmentDetail(BaseModel):
+    id: int
+    rentman_id: str
+    name: str
+    number: str | None = None
+    category: str | None = None
+    description: str | None = None
+    specifications: dict[str, Any] | None = None
+    images: list[str] | None = None
+    rental_price: Decimal | None = None
+    brand: str | None = None
+    available: bool = True
+
+    model_config = {"from_attributes": True}
+
+
+class PaginatedResponse(BaseModel):
+    items: list[EquipmentItem]
+    total: int
+    page: int
+    page_size: int
+    total_pages: int

backend/app/schemas/rental_request.py

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+"""Pydantic schemas for rental requests."""
+from pydantic import BaseModel, EmailStr, field_validator
+from datetime import date
+
+
+class RentalRequestItemCreate(BaseModel):
+    equipment_id: int
+    quantity: int = 1
+
+    @field_validator("quantity")
+    @classmethod
+    def quantity_positive(cls, v: int) -> int:
+        if v < 1:
+            raise ValueError("quantity must be >= 1")
+        return v
+
+
+class RentalRequestCreate(BaseModel):
+    event_name: str
+    date_start: date
+    date_end: date
+    location: str | None = None
+    person_count: int | None = None
+    contact_name: str
+    contact_company: str | None = None
+    contact_email: EmailStr
+    contact_phone: str | None = None
+    contact_street: str | None = None
+    contact_postalcode: str | None = None
+    contact_city: str | None = None
+    message: str | None = None
+    items: list[RentalRequestItemCreate]
+
+    @field_validator("date_end")
+    @classmethod
+    def date_end_after_start(cls, v: date, values) -> date:
+        start = values.data.get("date_start")
+        if start and v < start:
+            raise ValueError("date_end must be >= date_start")
+        return v
+
+    @field_validator("items")
+    @classmethod
+    def items_not_empty(cls, v: list) -> list:
+        if len(v) == 0:
+            raise ValueError("items must not be empty")
+        return v
+
+
+class RentalRequestResponse(BaseModel):
+    reference_number: str
+    status: str

backend/app/schemas/sync.py

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+"""Pydantic schemas for sync status and log."""
+from pydantic import BaseModel
+from datetime import datetime
+from typing import Any
+
+
+class SyncStatus(BaseModel):
+    last_sync: datetime | None = None
+    items_processed: int = 0
+    status: str = "never"
+
+
+class SyncLogEntry(BaseModel):
+    id: int
+    sync_type: str
+    status: str
+    items_processed: int
+    items_failed: int
+    error_message: str | None = None
+    started_at: datetime
+    completed_at: datetime | None = None
+
+    model_config = {"from_attributes": True}
+
+
+class SyncTriggerResponse(BaseModel):
+    sync_id: int
+    status: str