feat: add browse-at-scale — date ranges, load more, month navigator

CLI: --month YYYY-MM, --from/--to date range, --limit override
API: from/to query params for date range filtering
Web: load more button for pagination, month nav (◂/▸) in stream view

internal/api/entities.go

@@ -47,6 +47,20 @@ func listEntities(store *db.Store) http.HandlerFunc {
 			}
 			p.Date = &date
 		}
+		if from := r.URL.Query().Get("from"); from != "" {
+			if _, err := time.Parse("2006-01-02", from); err != nil {
+				writeError(w, http.StatusBadRequest, "invalid_input", "bad from format, use YYYY-MM-DD")
+				return
+			}
+			p.From = &from
+		}
+		if to := r.URL.Query().Get("to"); to != "" {
+			if _, err := time.Parse("2006-01-02", to); err != nil {
+				writeError(w, http.StatusBadRequest, "invalid_input", "bad to format, use YYYY-MM-DD")
+				return
+			}
+			p.To = &to
+		}
 		if r.URL.Query().Get("cards_only") == "true" {
 			p.CardsOnly = true
 		}

internal/db/entities.go

@@ -64,6 +64,8 @@ type Entity struct {
 type ListParams struct {
 	Tag            *string
 	Date           *string
+	From           *string
+	To             *string
 	Since          *time.Time
 	CardsOnly      bool
 	IncludeDeleted bool
@@ -192,6 +194,14 @@ func (s *Store) List(params ListParams) ([]*Entity, error) {
 		where = append(where, "date(e.created_at) = ?")
 		args = append(args, *params.Date)
 	}
+	if params.From != nil {
+		where = append(where, "date(e.created_at) >= ?")
+		args = append(args, *params.From)
+	}
+	if params.To != nil {
+		where = append(where, "date(e.created_at) <= ?")
+		args = append(args, *params.To)
+	}
 	if params.Since != nil {
 		where = append(where, "e.created_at >= ?")
 		args = append(args, params.Since.Format(time.RFC3339))