feat: harden support, localize knowledge and add operator availability [skip ci]

Source-only publication of reviewed commit 64e96a7f423673dc29ad56485be9fc79bce8af1c.

Passed in isolation: focused frontend/backend tests, race checks, TypeScript typecheck, lint, Go compilation, Flowgram build, and deterministic SDK build/tests.

Not accepted as a production release: Next.js export/native assembly remains blocked by environment memory limits; browser interaction and MySQL staging acceptance remain unverified. No production server, database/schema, runtime configuration, deployment, release tag, or workflow execution was performed.

Expected source tree: 0a4a7528e9.

internal/pkg/dto/response/setup_readiness_resp.go

@@ -1,3 +1,4 @@
+// Modified in AgentDeskFixes: safe, reviewed setup repairs and honest routing diagnostics.
 package response
 
 type SetupIssueItem struct {
@@ -92,7 +93,20 @@ type SetupSimulateRouteResponse struct {
 	CandidateOperators []SimulatedOperatorCandidate `json:"candidate_operators"`
 }
 
-type SetupQuickFixResponse struct {
-	AppliedActions []string               `json:"applied_actions"`
-	Readiness      SetupReadinessResponse `json:"readiness"`
+type SetupQuickFixChange struct {
+	EntityType string         `json:"entity_type"`
+	EntityID   int64          `json:"entity_id"`
+	EntityName string         `json:"entity_name"`
+	Operation  string         `json:"operation"`
+	Before     map[string]any `json:"before"`
+	After      map[string]any `json:"after"`
+}
+
+type SetupQuickFixResponse struct {
+	Applied        bool                    `json:"applied"`
+	PreviewToken   string                  `json:"preview_token"`
+	Changes        []SetupQuickFixChange   `json:"changes"`
+	WarningCodes   []string                `json:"warning_codes"`
+	AppliedActions []string                `json:"applied_actions"`
+	Readiness      *SetupReadinessResponse `json:"readiness,omitempty"`
 }

internal/pkg/dto/response/support_availability_resp.go

@@ -0,0 +1,41 @@
+package response
+
+import (
+	"agent-desk/internal/pkg/dto/request"
+	"agent-desk/internal/pkg/enums"
+)
+
+type SupportCalendarResponse struct {
+	request.SupportCalendarRequest
+	EffectiveTimezone  string `json:"effectiveTimezone"`
+	DeploymentTimezone string `json:"deploymentTimezone"`
+}
+type SupportCalendarPreviewResponse struct {
+	Open          bool   `json:"open"`
+	Timezone      string `json:"timezone"`
+	Mode          string `json:"mode"`
+	NextOpeningAt string `json:"nextOpeningAt,omitempty"`
+}
+type SupportAvailabilityResponse struct {
+	UserID                 int64                   `json:"userId"`
+	ProfileID              int64                   `json:"profileId"`
+	TeamID                 int64                   `json:"teamId"`
+	DisplayName            string                  `json:"displayName"`
+	ServiceStatus          enums.ServiceStatus     `json:"serviceStatus"`
+	ReturnServiceStatus    enums.ServiceStatus     `json:"returnServiceStatus"`
+	EffectiveServiceStatus enums.ServiceStatus     `json:"effectiveServiceStatus"`
+	AbsenceStartAt         string                  `json:"absenceStartAt,omitempty"`
+	AbsenceEndAt           string                  `json:"absenceEndAt,omitempty"`
+	Online                 bool                    `json:"online"`
+	Eligible               bool                    `json:"eligible"`
+	Reason                 string                  `json:"reason"`
+	Calendar               SupportCalendarResponse `json:"calendar"`
+	CalendarOpen           bool                    `json:"calendarOpen"`
+	NextOpeningAt          string                  `json:"nextOpeningAt,omitempty"`
+}
+type PublicSupportStatusResponse struct {
+	Available     bool   `json:"available"`
+	Reason        string `json:"reason"`
+	Timezone      string `json:"timezone"`
+	NextOpeningAt string `json:"nextOpeningAt,omitempty"`
+}