feat(api): add REST controllers, services, entities and 15-min timeline grid

src/main/java/com/caspos/controller/ReservationController.java

@@ -0,0 +1,62 @@
+package com.caspos.controller;
+
+import com.caspos.dto.CreateReservationRequest;
+import com.caspos.dto.ReservationDto;
+import com.caspos.service.ReservationService;
+import org.springframework.format.annotation.DateTimeFormat;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.time.LocalDate;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+@RestController
+@RequestMapping("/api/v1/reservations")
+@CrossOrigin(origins = {"http://localhost:5173", "http://localhost:3000"})
+public class ReservationController {
+
+    private final ReservationService reservationService;
+
+    public ReservationController(ReservationService reservationService) {
+        this.reservationService = reservationService;
+    }
+
+    /**
+     * GET /api/v1/reservations?date=YYYY-MM-DD
+     */
+    @GetMapping
+    public ResponseEntity<List<ReservationDto>> getByDate(
+        @RequestParam(required = false)
+        @DateTimeFormat(iso = DateTimeFormat.ISO.DATE) LocalDate date
+    ) {
+        LocalDate target = date != null ? date : LocalDate.now();
+        return ResponseEntity.ok(reservationService.getByDate(target));
+    }
+
+    /**
+     * POST /api/v1/reservations
+     */
+    @PostMapping
+    public ResponseEntity<ReservationDto> create(@RequestBody CreateReservationRequest request) {
+        return ResponseEntity.status(HttpStatus.CREATED).body(reservationService.create(request));
+    }
+
+    /**
+     * PATCH /api/v1/reservations/{id}/status
+     * Body: { "status": "CONFIRMED" }
+     */
+    @PatchMapping("/{id}/status")
+    public ResponseEntity<ReservationDto> updateStatus(
+        @PathVariable UUID id,
+        @RequestBody Map<String, String> body
+    ) {
+        String status = body.get("status");
+        if (status == null || status.isBlank()) {
+            return ResponseEntity.badRequest().build();
+        }
+        return ResponseEntity.ok(reservationService.updateStatus(id, status));
+    }
+}