Improve Twitter/X link handling and text formatting

- Use FxTwitter API for full note tweet text (with syndication API fallback)
- Save Twitter posts based on media content:
  - Videos → embed type (proxied video)
  - Images → image type (gallery)
  - Text-only → quote type
- Add granular preview badges: 'X VIDEO', 'X GALLERY', 'X POST'
- Preserve formatting/spacing with white-space: pre-wrap for quotes and descriptions
- Rename VideoInfo to EmbedInfo for better semantic clarity

internal/handlers/api_items.go

@@ -12,18 +12,17 @@ import (
 )
 
 type itemResponse struct {
-	ID                 string   `json:"id"`
-	Title              *string  `json:"title,omitempty"`
-	Description        *string  `json:"description,omitempty"`
-	LinkURL            *string  `json:"linkUrl,omitempty"`
-	ItemType           string   `json:"itemType"`
-	EmbedHTML          *string  `json:"embedHtml,omitempty"`
-	Tags               []string `json:"tags"`
-	CreatedAt          string   `json:"createdAt"`
-	MediaID            *int64   `json:"mediaId,omitempty"`
-	ThumbnailID        *int64   `json:"thumbnailId,omitempty"`
-	ThumbnailSourceURL *string  `json:"thumbnailSourceUrl,omitempty"`
-	GalleryIDs         []int64  `json:"galleryIds,omitempty"` // Additional images (for multi-image tweets)
+	ID          string   `json:"id"`
+	Title       *string  `json:"title,omitempty"`
+	Description *string  `json:"description,omitempty"`
+	LinkURL     *string  `json:"linkUrl,omitempty"`
+	ItemType    string   `json:"itemType"`
+	EmbedHTML   *string  `json:"embedHtml,omitempty"`
+	Tags        []string `json:"tags"`
+	CreatedAt   string   `json:"createdAt"`
+	MediaID     *int64   `json:"mediaId,omitempty"`
+	ImageIDs    []int64  `json:"imageIds,omitempty"`  // Fetched images (from URLs/embeds)
+	ImageURLs   []string `json:"imageUrls,omitempty"` // Source URLs for fetched images
 }
 
 type createItemRequest struct {
@@ -252,22 +251,17 @@ func buildItemResponse(ctx context.Context, rc *RequestContext, it item.Row) (it
 	}
 
 	// Get media IDs
-	// Media is ordered by ID, so first "image" is the thumbnail, rest are gallery
 	mediaList, err := media.QFindByItemID(ctx, rc.DB, it.ID)
 	if err != nil {
 		return itemResponse{}, err
 	}
-	firstImage := true
 	for _, m := range mediaList {
 		if m.MediaType == "original" {
 			resp.MediaID = &m.ID
 		} else if m.MediaType == "image" {
-			if firstImage {
-				resp.ThumbnailID = &m.ID
-				resp.ThumbnailSourceURL = m.SourceURL
-				firstImage = false
-			} else {
-				resp.GalleryIDs = append(resp.GalleryIDs, m.ID)
+			resp.ImageIDs = append(resp.ImageIDs, m.ID)
+			if m.SourceURL != nil {
+				resp.ImageURLs = append(resp.ImageURLs, *m.SourceURL)
 			}
 		}
 	}