feat: buyer-specific request lists

Add is_buyer_specific and visible_to_buyer_group to diligence_requests.
Filter request list for buyers to show general requests plus their
buyer-group-specific ones.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/db/migrate.go

@@ -233,6 +233,9 @@ var additiveMigrationStmts = []string{
 	`ALTER TABLE folders ADD COLUMN sort_order INTEGER DEFAULT 0`,
 	// Section 7: file storage path
 	`ALTER TABLE files ADD COLUMN storage_path TEXT DEFAULT ''`,
+	// Section 9: buyer-specific requests
+	`ALTER TABLE diligence_requests ADD COLUMN is_buyer_specific INTEGER DEFAULT 0`,
+	`ALTER TABLE diligence_requests ADD COLUMN visible_to_buyer_group TEXT DEFAULT ''`,
 }
 
 func seed(db *sql.DB) error {

internal/handler/deals.go

@@ -363,7 +363,7 @@ func (h *Handler) getFiles(dealID string) []*model.File {
 }
 
 func (h *Handler) getRequests(dealID string, profile *model.Profile) []*model.DiligenceRequest {
-	query := "SELECT id, deal_id, item_number, section, description, priority, atlas_status, atlas_note, confidence, buyer_comment, seller_comment, buyer_group FROM diligence_requests WHERE deal_id = ?"
+	query := "SELECT id, deal_id, item_number, section, description, priority, atlas_status, atlas_note, confidence, buyer_comment, seller_comment, buyer_group, linked_file_ids, COALESCE(is_buyer_specific, 0), COALESCE(visible_to_buyer_group, '') FROM diligence_requests WHERE deal_id = ?"
 	args := []interface{}{dealID}
 
 	if rbac.EffectiveIsBuyer(profile) {
@@ -374,7 +374,13 @@ func (h *Handler) getRequests(dealID string, profile *model.Profile) []*model.Di
 				placeholders[i] = "?"
 				args = append(args, g)
 			}
-			query += " AND buyer_group IN (" + strings.Join(placeholders, ",") + ")"
+			// Show general requests (not buyer-specific) AND buyer-specific ones for this group
+			query += " AND (COALESCE(is_buyer_specific, 0) = 0 OR COALESCE(visible_to_buyer_group, '') IN (" + strings.Join(placeholders, ",") + "))"
+			// Also filter by buyer_group for general requests
+			query += " AND (buyer_group IN (" + strings.Join(placeholders, ",") + ") OR buyer_group = '')"
+			for _, g := range groups {
+				args = append(args, g)
+			}
 		}
 	}
 	query += " ORDER BY item_number"
@@ -388,7 +394,7 @@ func (h *Handler) getRequests(dealID string, profile *model.Profile) []*model.Di
 	var reqs []*model.DiligenceRequest
 	for rows.Next() {
 		r := &model.DiligenceRequest{}
-		rows.Scan(&r.ID, &r.DealID, &r.ItemNumber, &r.Section, &r.Description, &r.Priority, &r.AtlasStatus, &r.AtlasNote, &r.Confidence, &r.BuyerComment, &r.SellerComment, &r.BuyerGroup)
+		rows.Scan(&r.ID, &r.DealID, &r.ItemNumber, &r.Section, &r.Description, &r.Priority, &r.AtlasStatus, &r.AtlasNote, &r.Confidence, &r.BuyerComment, &r.SellerComment, &r.BuyerGroup, &r.LinkedFileIDs, &r.IsBuyerSpecific, &r.VisibleToBuyerGroup)
 		reqs = append(reqs, r)
 	}
 	return reqs

internal/model/models.go

@@ -98,8 +98,10 @@ type DiligenceRequest struct {
 	BuyerComment  string
 	SellerComment string
 	BuyerGroup    string
-	LinkedFileIDs string
-	CreatedBy     string
+	LinkedFileIDs       string
+	IsBuyerSpecific     bool
+	VisibleToBuyerGroup string
+	CreatedBy           string
 	CreatedAt     time.Time
 	UpdatedAt     time.Time
 }