Add Twitter video support and use sql.Null[T] for nullable columns

- Store Twitter video URLs in embed_video_url column instead of downloading
- Play videos directly from Twitter's CDN in <video> element
- Fix Twitter API parsing (content_type/url fields)
- Strip t.co URLs from tweet text descriptions
- Use sql.Null[T] generic type for nullable DB columns
- Add Nullable[T] and Ptr[T] helper functions
- Add play indicator overlay for video items in grid
- Add migration for embed_video_url column

internal/handlers/item_page.go

@@ -3,6 +3,7 @@ package handlers
 import (
 	"context"
 	"net/http"
+	"strings"
 	"time"
 
 	"git.soup.land/soup/sxgo/ssr"
@@ -18,16 +19,18 @@ type itemPageContent struct {
 }
 
 type itemPageData struct {
-	ID          string
-	Title       *string
-	Description *string
-	LinkURL     *string
-	ItemType    string
-	EmbedHTML   *string
-	Tags        []string
-	CreatedAt   string
-	ThumbnailID *int64
-	MediaID     *int64
+	ID            string
+	Title         *string
+	Description   *string
+	LinkURL       *string
+	ItemType      string
+	EmbedHTML     *string
+	EmbedVideoURL *string
+	Tags          []string
+	CreatedAt     string
+	ThumbnailID   *int64
+	MediaID       *int64
+	MediaIsVideo  bool
 }
 
 func (c itemPageContent) Render(sw *ssr.Writer) error {
@@ -48,7 +51,13 @@ func (c itemPageContent) Render(sw *ssr.Writer) error {
 			</video>
 		</div>
 		{{else if eq .Item.ItemType "embed"}}
-		{{if .Item.ThumbnailID}}
+		{{if .Item.EmbedVideoURL}}
+		<div class="video-container">
+			<video controls poster="{{if .Item.ThumbnailID}}/media/{{.Item.ThumbnailID}}{{end}}">
+				<source src="{{.Item.EmbedVideoURL}}" type="video/mp4">
+			</video>
+		</div>
+		{{else if .Item.ThumbnailID}}
 		<div class="image-container">
 			<img src="/media/{{.Item.ThumbnailID}}" alt="{{if .Item.Title}}{{.Item.Title}}{{else}}Embed{{end}}">
 		</div>
@@ -162,6 +171,7 @@ func HandleItemPage(rc *RequestContext, w http.ResponseWriter, r *http.Request)
 
 	// Get media
 	var thumbnailID, mediaID *int64
+	var mediaIsVideo bool
 	mediaList, err := media.QFindByItemID(ctx, rc.DB, it.ID)
 	if err != nil {
 		return err
@@ -171,28 +181,31 @@ func HandleItemPage(rc *RequestContext, w http.ResponseWriter, r *http.Request)
 			thumbnailID = &m.ID
 		} else if m.MediaType == "original" {
 			mediaID = &m.ID
+			mediaIsVideo = strings.HasPrefix(m.ContentType, "video/")
 		}
 	}
 
 	data := itemPageData{
-		ID:          it.PubID,
-		Title:       it.Title,
-		Description: it.Description,
-		LinkURL:     it.LinkURL,
-		ItemType:    it.ItemType,
-		EmbedHTML:   it.EmbedHTML,
-		Tags:        tagNames,
-		CreatedAt:   it.CreatedAt.Format("Jan 2, 2006"),
-		ThumbnailID: thumbnailID,
-		MediaID:     mediaID,
+		ID:            it.PubID,
+		Title:         item.Ptr(it.Title),
+		Description:   item.Ptr(it.Description),
+		LinkURL:       item.Ptr(it.LinkURL),
+		ItemType:      it.ItemType,
+		EmbedHTML:     item.Ptr(it.EmbedHTML),
+		EmbedVideoURL: item.Ptr(it.EmbedVideoURL),
+		Tags:          tagNames,
+		CreatedAt:     it.CreatedAt.Format("Jan 2, 2006"),
+		ThumbnailID:   thumbnailID,
+		MediaID:       mediaID,
+		MediaIsVideo:  mediaIsVideo,
 	}
 
 	w.Header().Set("Content-Type", "text/html; charset=utf-8")
 	sw := ssr.NewWriter(w, rc.TmplCache)
 
 	var title string
-	if it.Title != nil {
-		title = *it.Title
+	if it.Title.Valid {
+		title = it.Title.V
 	}
 
 	page := components.Page{