Emdash source with visual editor image upload fix

Fixes:
1. media.ts: wrap placeholder generation in try-catch
2. toolbar.ts: check r.ok, display error message in popover

packages/plugins/embeds/src/astro/Bluesky.astro

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+---
+/**
+ * Bluesky post embed component for Portable Text
+ *
+ * Wraps astro-embed's BlueskyPost component, extracting props from the PT block node.
+ * astro-portabletext passes `node` (not `value`) for custom type components.
+ * 
+ * Accepts either `id` or `url` field for compatibility with different content sources.
+ */
+import { BlueskyPost } from "astro-embed";
+import type { BlueskyBlock } from "../schemas.js";
+
+interface Props {
+	node: BlueskyBlock & { url?: string };
+}
+
+const { node } = Astro.props;
+// Support both 'id' (schema) and 'url' (admin editor) field names
+const postId = node.id || node.url;
+---
+
+{postId && <BlueskyPost id={postId} />}

packages/plugins/embeds/src/astro/Gist.astro

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+---
+/**
+ * GitHub Gist embed component for Portable Text
+ *
+ * Wraps astro-embed's Gist component, extracting props from the PT block node.
+ * astro-portabletext passes `node` (not `value`) for custom type components.
+ */
+import { Gist as AstroGist } from "astro-embed";
+import type { GistBlock } from "../schemas.js";
+
+interface Props {
+	node: GistBlock;
+}
+
+const { node } = Astro.props;
+const { id, file } = node;
+---
+
+<AstroGist id={id} file={file} />

packages/plugins/embeds/src/astro/LinkPreview.astro

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+---
+/**
+ * Link preview (Open Graph) embed component for Portable Text
+ *
+ * Wraps astro-embed's LinkPreview component, extracting props from the PT block node.
+ * astro-portabletext passes `node` (not `value`) for custom type components.
+ */
+import { LinkPreview as AstroLinkPreview } from "astro-embed";
+import type { LinkPreviewBlock } from "../schemas.js";
+
+interface Props {
+	node: LinkPreviewBlock;
+}
+
+const { node } = Astro.props;
+const { id, hideMedia } = node;
+---
+
+<AstroLinkPreview id={id} hideMedia={hideMedia} />

packages/plugins/embeds/src/astro/Mastodon.astro

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+---
+/**
+ * Mastodon post embed component for Portable Text
+ *
+ * Wraps astro-embed's MastodonPost component, extracting props from the PT block node.
+ * astro-portabletext passes `node` (not `value`) for custom type components.
+ */
+import { MastodonPost } from "astro-embed";
+import type { MastodonBlock } from "../schemas.js";
+
+interface Props {
+	node: MastodonBlock;
+}
+
+const { node } = Astro.props;
+const { id } = node;
+---
+
+<MastodonPost id={id} />

packages/plugins/embeds/src/astro/Tweet.astro

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+---
+/**
+ * Tweet embed component for Portable Text
+ *
+ * Wraps astro-embed's Tweet component, extracting props from the PT block node.
+ * astro-portabletext passes `node` (not `value`) for custom type components.
+ */
+import { Tweet as AstroTweet } from "astro-embed";
+import type { TweetBlock } from "../schemas.js";
+
+interface Props {
+	node: TweetBlock;
+}
+
+const { node } = Astro.props;
+const { id, theme } = node;
+---
+
+<AstroTweet id={id} theme={theme} />

packages/plugins/embeds/src/astro/Vimeo.astro

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+---
+/**
+ * Vimeo embed component for Portable Text
+ *
+ * Wraps astro-embed's Vimeo component, extracting props from the PT block node.
+ * astro-portabletext passes `node` (not `value`) for custom type components.
+ */
+import { Vimeo as AstroVimeo } from "astro-embed";
+import type { VimeoBlock } from "../schemas.js";
+
+interface Props {
+	node: VimeoBlock;
+}
+
+const { node } = Astro.props;
+const { id, poster, posterQuality, params, playlabel } = node;
+---
+
+<AstroVimeo
+	id={id}
+	poster={poster}
+	posterQuality={posterQuality}
+	params={params}
+	playlabel={playlabel}
+/>

packages/plugins/embeds/src/astro/YouTube.astro

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+---
+/**
+ * YouTube embed component for Portable Text
+ *
+ * Wraps astro-embed's YouTube component, extracting props from the PT block node.
+ * astro-portabletext passes `node` (not `value`) for custom type components.
+ */
+import { YouTube as AstroYouTube } from "astro-embed";
+import type { YouTubeBlock } from "../schemas.js";
+
+interface Props {
+	node: YouTubeBlock;
+}
+
+const { node } = Astro.props;
+const { id, poster, posterQuality, params, playlabel, title } = node;
+---
+
+<AstroYouTube
+	id={id}
+	poster={poster}
+	posterQuality={posterQuality}
+	params={params}
+	playlabel={playlabel}
+	title={title}
+/>

packages/plugins/embeds/src/astro/index.ts

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+/**
+ * Astro components for rendering embed blocks in Portable Text
+ *
+ * These components are automatically registered with PortableText when
+ * the embeds plugin is enabled. Manual wiring is no longer needed!
+ *
+ * The components are exported with lowercase names matching their block types
+ * for auto-registration, plus PascalCase aliases for direct usage.
+ *
+ * @example Direct usage (if you need to customize)
+ * ```astro
+ * ---
+ * import { YouTube } from "@emdash-cms/plugin-embeds/astro";
+ * ---
+ * <YouTube value={{ id: "dQw4w9WgXcQ", _type: "youtube", _key: "1" }} />
+ * ```
+ */
+
+import BlueskyComponent from "./Bluesky.astro";
+import GistComponent from "./Gist.astro";
+import LinkPreviewComponent from "./LinkPreview.astro";
+import MastodonComponent from "./Mastodon.astro";
+import TweetComponent from "./Tweet.astro";
+import VimeoComponent from "./Vimeo.astro";
+// Import all components
+import YouTubeComponent from "./YouTube.astro";
+
+// Export with lowercase names (for auto-registration via virtual module)
+// These names MUST match the block type names in EMBED_BLOCK_TYPES
+export {
+	YouTubeComponent as youtube,
+	VimeoComponent as vimeo,
+	TweetComponent as tweet,
+	BlueskyComponent as bluesky,
+	MastodonComponent as mastodon,
+	LinkPreviewComponent as linkPreview,
+	GistComponent as gist,
+};
+
+// Also export with PascalCase for direct usage
+export {
+	YouTubeComponent as YouTube,
+	VimeoComponent as Vimeo,
+	TweetComponent as Tweet,
+	BlueskyComponent as Bluesky,
+	MastodonComponent as Mastodon,
+	LinkPreviewComponent as LinkPreview,
+	GistComponent as Gist,
+};
+
+/**
+ * All embed components keyed by their Portable Text block type.
+ * Exported as `blockComponents` for auto-registration via the virtual module,
+ * and as `embedComponents` for direct usage.
+ */
+export const blockComponents = {
+	youtube: YouTubeComponent,
+	vimeo: VimeoComponent,
+	tweet: TweetComponent,
+	bluesky: BlueskyComponent,
+	mastodon: MastodonComponent,
+	linkPreview: LinkPreviewComponent,
+	gist: GistComponent,
+} as const;
+
+export { blockComponents as embedComponents };

packages/plugins/embeds/src/index.ts

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+/**
+ * Embeds Plugin for EmDash CMS
+ *
+ * Provides Portable Text block types for embedding external content:
+ * - YouTube videos
+ * - Vimeo videos
+ * - Twitter/X tweets
+ * - Bluesky posts
+ * - Mastodon posts
+ * - Link previews (Open Graph)
+ * - GitHub Gists
+ *
+ * Uses astro-embed components for high-performance, privacy-respecting embeds.
+ *
+ * @example
+ * ```typescript
+ * // live.config.ts
+ * import { embedsPlugin } from "@emdash-cms/plugin-embeds";
+ *
+ * export default defineConfig({
+ *   plugins: [embedsPlugin()],
+ * });
+ * ```
+ *
+ * Embed components are automatically registered with PortableText when
+ * the plugin is enabled. No manual component wiring needed!
+ *
+ * If you need to customize rendering, you can still override specific types:
+ *
+ * @example
+ * ```astro
+ * <PortableText
+ *   value={content}
+ *   components={{
+ *     types: {
+ *       youtube: MyCustomYouTube, // Override just this one
+ *     },
+ *   }}
+ * />
+ * ```
+ */
+
+import type { Element } from "@emdash-cms/blocks";
+import type { PluginDescriptor, ResolvedPlugin } from "emdash";
+import { definePlugin } from "emdash";
+
+import { EMBED_BLOCK_TYPES } from "./schemas.js";
+
+/** Rich metadata for each embed block type */
+const EMBED_BLOCK_META: Record<
+	string,
+	{
+		label: string;
+		icon?: string;
+		description?: string;
+		placeholder?: string;
+		fields?: Element[];
+	}
+> = {
+	youtube: {
+		label: "YouTube Video",
+		icon: "video",
+		placeholder: "Paste YouTube URL...",
+		fields: [
+			{
+				type: "text_input",
+				action_id: "id",
+				label: "YouTube URL",
+				placeholder: "https://youtube.com/watch?v=...",
+			},
+			{ type: "text_input", action_id: "title", label: "Title" },
+			{ type: "text_input", action_id: "poster", label: "Poster Image URL" },
+			{
+				type: "text_input",
+				action_id: "params",
+				label: "Player Parameters",
+				placeholder: "start=57&end=75",
+			},
+		],
+	},
+	vimeo: {
+		label: "Vimeo Video",
+		icon: "video",
+		placeholder: "Paste Vimeo URL...",
+		fields: [
+			{
+				type: "text_input",
+				action_id: "id",
+				label: "Vimeo URL",
+				placeholder: "https://vimeo.com/...",
+			},
+			{ type: "text_input", action_id: "poster", label: "Poster Image URL" },
+			{ type: "text_input", action_id: "params", label: "Player Parameters" },
+		],
+	},
+	tweet: { label: "Tweet (X)", icon: "link", placeholder: "Paste tweet URL..." },
+	bluesky: { label: "Bluesky Post", icon: "link", placeholder: "Paste Bluesky post URL..." },
+	mastodon: { label: "Mastodon Post", icon: "link", placeholder: "Paste Mastodon post URL..." },
+	linkPreview: {
+		label: "Link Preview",
+		icon: "link-external",
+		placeholder: "Paste any URL...",
+	},
+	gist: {
+		label: "GitHub Gist",
+		icon: "code",
+		placeholder: "Paste Gist URL...",
+		fields: [
+			{
+				type: "text_input",
+				action_id: "id",
+				label: "Gist URL",
+				placeholder: "https://gist.github.com/.../...",
+			},
+			{
+				type: "text_input",
+				action_id: "file",
+				label: "Specific File",
+				placeholder: "Optional: filename to show",
+			},
+		],
+	},
+};
+
+export interface EmbedsPluginOptions {
+	/**
+	 * Which embed types to enable.
+	 * Defaults to all types.
+	 */
+	types?: Array<(typeof EMBED_BLOCK_TYPES)[number]>;
+}
+
+/**
+ * Create the embeds plugin descriptor
+ */
+export function embedsPlugin(
+	options: EmbedsPluginOptions = {},
+): PluginDescriptor<EmbedsPluginOptions> {
+	return {
+		id: "embeds",
+		version: "0.0.1",
+		entrypoint: "@emdash-cms/plugin-embeds",
+		componentsEntry: "@emdash-cms/plugin-embeds/astro",
+		options,
+	};
+}
+
+/**
+ * Create the embeds plugin
+ */
+export function createPlugin(options: EmbedsPluginOptions = {}): ResolvedPlugin {
+	const _enabledTypes = options.types ?? [...EMBED_BLOCK_TYPES];
+
+	return definePlugin({
+		id: "embeds",
+		version: "0.0.1",
+
+		// This plugin only provides block types - no server-side capabilities needed
+		capabilities: [],
+
+		admin: {
+			portableTextBlocks: _enabledTypes.map((type) => {
+				const meta = EMBED_BLOCK_META[type];
+				return {
+					type,
+					label: meta?.label ?? type,
+					icon: meta?.icon,
+					description: meta?.description,
+					placeholder: meta?.placeholder,
+					fields: meta?.fields,
+				};
+			}),
+		},
+	});
+}
+
+// Re-export schemas for consumers who need them
+export * from "./schemas.js";
+
+export default createPlugin;
+
+// Re-export the enabled types for the plugin to use
+export { EMBED_BLOCK_TYPES };

packages/plugins/embeds/src/schemas.ts

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+/**
+ * Block schemas for embed types
+ *
+ * These define the Portable Text block structure for each embed type.
+ * The schemas match the props expected by astro-embed components.
+ */
+
+import { z } from "astro/zod";
+
+/** Matches http(s) scheme at start of URL */
+const HTTP_SCHEME_RE = /^https?:\/\//i;
+
+/** Validates that a URL string uses http or https scheme. Rejects javascript:/data: URI XSS vectors. */
+const httpUrl = z
+	.string()
+	.url()
+	.refine((url) => HTTP_SCHEME_RE.test(url), "URL must use http or https");
+
+/**
+ * YouTube embed block
+ * @see https://astro-embed.netlify.app/components/youtube/
+ */
+export const youtubeBlockSchema = z.object({
+	_type: z.literal("youtube"),
+	_key: z.string(),
+	/** YouTube video ID or URL */
+	id: z.string(),
+	/** Custom poster image URL */
+	poster: httpUrl.optional(),
+	/** Poster quality when using default YouTube thumbnail */
+	posterQuality: z.enum(["max", "high", "default", "low"]).optional(),
+	/** YouTube player parameters (e.g., "start=57&end=75") */
+	params: z.string().optional(),
+	/** Accessible label for the play button */
+	playlabel: z.string().optional(),
+	/** Visible title overlay */
+	title: z.string().optional(),
+});
+
+export type YouTubeBlock = z.infer<typeof youtubeBlockSchema>;
+
+/**
+ * Vimeo embed block
+ * @see https://astro-embed.netlify.app/components/vimeo/
+ */
+export const vimeoBlockSchema = z.object({
+	_type: z.literal("vimeo"),
+	_key: z.string(),
+	/** Vimeo video ID or URL */
+	id: z.string(),
+	/** Custom poster image URL */
+	poster: httpUrl.optional(),
+	/** Poster quality */
+	posterQuality: z.enum(["max", "high", "default", "low"]).optional(),
+	/** Vimeo player parameters */
+	params: z.string().optional(),
+	/** Accessible label for the play button */
+	playlabel: z.string().optional(),
+});
+
+export type VimeoBlock = z.infer<typeof vimeoBlockSchema>;
+
+/**
+ * Twitter/X tweet embed block
+ * @see https://astro-embed.netlify.app/components/twitter/
+ */
+export const tweetBlockSchema = z.object({
+	_type: z.literal("tweet"),
+	_key: z.string(),
+	/** Tweet URL or ID */
+	id: z.string(),
+	/** Color theme */
+	theme: z.enum(["light", "dark"]).optional(),
+});
+
+export type TweetBlock = z.infer<typeof tweetBlockSchema>;
+
+/**
+ * Bluesky post embed block
+ * @see https://astro-embed.netlify.app/components/bluesky/
+ */
+export const blueskyBlockSchema = z.object({
+	_type: z.literal("bluesky"),
+	_key: z.string(),
+	/** Bluesky post URL or AT URI */
+	id: z.string(),
+});
+
+export type BlueskyBlock = z.infer<typeof blueskyBlockSchema>;
+
+/**
+ * Mastodon post embed block
+ * @see https://astro-embed.netlify.app/components/mastodon/
+ */
+export const mastodonBlockSchema = z.object({
+	_type: z.literal("mastodon"),
+	_key: z.string(),
+	/** Mastodon post URL */
+	id: z.string(),
+});
+
+export type MastodonBlock = z.infer<typeof mastodonBlockSchema>;
+
+/**
+ * Link preview / Open Graph embed block
+ * @see https://astro-embed.netlify.app/components/link-preview/
+ */
+export const linkPreviewBlockSchema = z.object({
+	_type: z.literal("linkPreview"),
+	_key: z.string(),
+	/** URL to fetch Open Graph data from */
+	id: httpUrl,
+	/** Hide media (image/video) even if present in OG data */
+	hideMedia: z.boolean().optional(),
+});
+
+export type LinkPreviewBlock = z.infer<typeof linkPreviewBlockSchema>;
+
+/**
+ * GitHub Gist embed block
+ * @see https://astro-embed.netlify.app/components/gist/
+ */
+export const gistBlockSchema = z.object({
+	_type: z.literal("gist"),
+	_key: z.string(),
+	/** Gist URL */
+	id: httpUrl,
+	/** Specific file to show (case-sensitive) */
+	file: z.string().optional(),
+});
+
+export type GistBlock = z.infer<typeof gistBlockSchema>;
+
+/**
+ * Union of all embed block types
+ */
+export const embedBlockSchema = z.discriminatedUnion("_type", [
+	youtubeBlockSchema,
+	vimeoBlockSchema,
+	tweetBlockSchema,
+	blueskyBlockSchema,
+	mastodonBlockSchema,
+	linkPreviewBlockSchema,
+	gistBlockSchema,
+]);
+
+export type EmbedBlock = z.infer<typeof embedBlockSchema>;
+
+/**
+ * Block type names for use in plugin registration
+ */
+export const EMBED_BLOCK_TYPES = [
+	"youtube",
+	"vimeo",
+	"tweet",
+	"bluesky",
+	"mastodon",
+	"linkPreview",
+	"gist",
+] as const;
+
+export type EmbedBlockType = (typeof EMBED_BLOCK_TYPES)[number];