feat: data surfacing — intake labels, service metrics, honest capacity

- booking views gain intakeLabels (declared key→label join); dashboard
  modal + manage view render real question labels with slug fallback
- GET /v1/metrics/services aggregates bookings/completed/cancelled/
  revenue per service + classBookings; service-report.csv delegates to
  the same ServiceMetrics aggregation and gains a completed column
- services page gains a Service performance card (per-service stat grid,
  locale CZK revenue, class-bookings footer); demo rows match the
  fabricated service list
- staff capacity utilization subtracts blocked days — tenant-wide and
  staff-scoped blocks remove that day's rule minutes via blockedAt
- tests: blocked-day capacity (tenant + staff scope), service aggregation

Authored By: TDvorak <[email protected]>

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

apps/backend/openapi/bookra.openapi.yaml

@@ -1545,6 +1545,33 @@ paths:
                 $ref: "#/components/schemas/StaffMetricsResponse"
         "404":
           description: Tenant membership not found
+  /v1/metrics/services:
+    get:
+      tags: [Metrics]
+      operationId: getServiceMetrics
+      security:
+        - bearerAuth: []
+      summary: Per-service appointment metrics over a trailing window
+      description: >-
+        Bookings, completions, cancellations, and revenue per catalog service.
+        Every service appears, including zero rows. Class bookings carry no
+        service or price and are counted separately in `classBookings`.
+      parameters:
+        - name: days
+          in: query
+          schema:
+            type: integer
+            default: 30
+            maximum: 365
+      responses:
+        "200":
+          description: Per-service metrics
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ServiceMetricsResponse"
+        "404":
+          description: Tenant membership not found
   /v1/export/bookings.csv:
     get:
       tags: [Export]
@@ -2219,6 +2246,11 @@ components:
           additionalProperties:
             type: string
           description: Structured intake answers keyed by the service's declared intakeFields keys
+        intakeLabels:
+          type: object
+          additionalProperties:
+            type: string
+          description: Maps intake answer keys to the service's declared field labels; absent for services without intake
         classSessionId:
           type: string
           format: uuid
@@ -2266,6 +2298,11 @@ components:
           type: object
           additionalProperties:
             type: string
+        intakeLabels:
+          type: object
+          additionalProperties:
+            type: string
+          description: Maps intake answer keys to the service's declared field labels; absent for services without intake
         waitlistPosition:
           type: integer
           description: 1-based queue spot for waitlisted class bookings; absent otherwise
@@ -2408,6 +2445,42 @@ components:
           type: array
           items:
             $ref: "#/components/schemas/StaffMetric"
+    ServiceMetric:
+      type: object
+      required: [serviceId, name, bookings, completed, cancelled, revenueCents]
+      properties:
+        serviceId:
+          type: string
+          format: uuid
+        name:
+          type: string
+        bookings:
+          type: integer
+        completed:
+          type: integer
+        cancelled:
+          type: integer
+        revenueCents:
+          type: integer
+          format: int64
+          description: Sum of the service's price for non-cancelled bookings
+    ServiceMetricsResponse:
+      type: object
+      required: [from, to, services, classBookings]
+      properties:
+        from:
+          type: string
+          format: date-time
+        to:
+          type: string
+          format: date-time
+        services:
+          type: array
+          items:
+            $ref: "#/components/schemas/ServiceMetric"
+        classBookings:
+          type: integer
+          description: Session bookings in the window; reported separately since they carry no service or price
     DashboardBookingRequest:
       type: object
       required: [customerName, customerEmail, startsAt]