feat: add feedback resolver

internal/model/feedback.go

@@ -15,12 +15,17 @@ import "time"
 // the repo's lookup helpers (used by the admin email template and the
 // /stats page). They're nil for anonymous rows.
 type Feedback struct {
-	ID           string    `json:"id"`
-	UserID       *string   `json:"user_id,omitempty"`
-	Category     string    `json:"category"`
-	Message      string    `json:"message"`
-	ContactEmail *string   `json:"contact_email,omitempty"`
-	CreatedAt    time.Time `json:"created_at"`
+	ID           string     `json:"id"`
+	UserID       *string    `json:"user_id,omitempty"`
+	Category     string     `json:"category"`
+	Message      string     `json:"message"`
+	ContactEmail *string    `json:"contact_email,omitempty"`
+	CreatedAt    time.Time  `json:"created_at"`
+	// ResolvedAt is set the moment an admin presses "Mark resolved" on
+	// the /stats page. NULL while open. The action is one-way — the
+	// repo's MarkResolved guards on `resolved_at IS NULL` so a second
+	// resolve is a no-op.
+	ResolvedAt   *time.Time `json:"resolved_at,omitempty"`
 
 	AuthorHandle *string `json:"author_handle,omitempty"`
 	AuthorName   *string `json:"author_name,omitempty"`