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

templates/blog-cloudflare/.claude/skills/building-emdash-site/references/configuration.md

@@ -0,0 +1,193 @@
+# Configuration
+
+## astro.config.mjs
+
+### Node.js (local development / self-hosted)
+
+```javascript
+import node from "@astrojs/node";
+import react from "@astrojs/react";
+import { defineConfig } from "astro/config";
+import emdash, { local } from "emdash/astro";
+import { sqlite } from "emdash/db";
+
+export default defineConfig({
+	output: "server",
+	adapter: node({ mode: "standalone" }),
+	image: {
+		layout: "constrained",
+		responsiveStyles: true,
+	},
+	integrations: [
+		react(),
+		emdash({
+			database: sqlite({ url: "file:./data.db" }),
+			storage: local({
+				directory: "./uploads",
+				baseUrl: "/_emdash/api/media/file",
+			}),
+		}),
+	],
+	devToolbar: { enabled: false },
+});
+```
+
+### Cloudflare (D1 + R2)
+
+```javascript
+import cloudflare from "@astrojs/cloudflare";
+import react from "@astrojs/react";
+import { d1, r2 } from "@emdash-cms/cloudflare";
+import { defineConfig } from "astro/config";
+import emdash from "emdash/astro";
+
+export default defineConfig({
+	output: "server",
+	adapter: cloudflare(),
+	image: {
+		layout: "constrained",
+		responsiveStyles: true,
+	},
+	integrations: [
+		react(),
+		emdash({
+			database: d1({ binding: "DB", session: "auto" }),
+			storage: r2({ binding: "MEDIA" }),
+		}),
+	],
+	devToolbar: { enabled: false },
+});
+```
+
+Requires a `wrangler.jsonc` with D1 and R2 bindings:
+
+```jsonc
+{
+	"name": "my-site",
+	"compatibility_date": "2026-02-24",
+	"compatibility_flags": ["nodejs_compat"],
+	"assets": { "directory": "./dist" },
+	"d1_databases": [
+		{
+			"binding": "DB",
+			"database_name": "my-site",
+			"database_id": "", // from `wrangler d1 create my-site`
+		},
+	],
+	"r2_buckets": [
+		{
+			"binding": "MEDIA",
+			"bucket_name": "my-site-media",
+		},
+	],
+}
+```
+
+### Plugins
+
+Register plugins in `astro.config.mjs`:
+
+```javascript
+import { auditLogPlugin } from "@emdash-cms/plugin-audit-log";
+
+emdash({
+	database: sqlite({ url: "file:./data.db" }),
+	storage: local({ directory: "./uploads", baseUrl: "/_emdash/api/media/file" }),
+	plugins: [auditLogPlugin()],
+}),
+```
+
+## live.config.ts
+
+Every EmDash site needs this file at `src/live.config.ts`. It's boilerplate -- the same in every project:
+
+```typescript
+import { defineLiveCollection } from "astro:content";
+import { emdashLoader } from "emdash/runtime";
+
+export const collections = {
+	_emdash: defineLiveCollection({ loader: emdashLoader() }),
+};
+```
+
+This registers EmDash's live content collections with Astro. All content types are served through the single `_emdash` collection -- you query specific types using `getEmDashCollection("posts")` etc.
+
+## emdash-env.d.ts
+
+Auto-generated at the project root when the dev server starts. Provides TypeScript types for your collections. This is the file your `tsconfig.json` includes.
+
+```typescript
+/// <reference types="emdash/locals" />
+
+import type { PortableTextBlock } from "emdash";
+
+export interface Post {
+	id: string;
+	slug: string | null;
+	status: string;
+	title: string;
+	featured_image?: {
+		id: string;
+		src?: string;
+		alt?: string;
+		width?: number;
+		height?: number;
+	};
+	content?: PortableTextBlock[];
+	excerpt?: string;
+	createdAt: Date;
+	updatedAt: Date;
+	publishedAt: Date | null;
+}
+
+declare module "emdash" {
+	interface EmDashCollections {
+		posts: Post;
+	}
+}
+```
+
+The dev server regenerates this file automatically when schema changes. You can also generate it manually:
+
+## Type Generation
+
+```bash
+# From local dev server (writes emdash-env.d.ts at project root)
+npx emdash types
+
+# From remote instance
+npx emdash types --url https://my-site.pages.dev
+
+# Custom output path
+npx emdash types --output src/types/cms.ts
+```
+
+The CLI also writes `.emdash/schema.json` with the raw schema for tooling.
+
+## package.json
+
+Key dependencies for a Node.js site:
+
+```json
+{
+	"dependencies": {
+		"astro": "^6.0.0",
+		"emdash": "workspace:*",
+		"@astrojs/node": "^9.0.0",
+		"@astrojs/react": "^4.0.0",
+		"react": "^18.0.0",
+		"react-dom": "^18.0.0"
+	}
+}
+```
+
+For Cloudflare, replace `@astrojs/node` with `@astrojs/cloudflare` and add `@emdash-cms/cloudflare`.
+
+## Dev Server
+
+```bash
+npx emdash dev              # Start dev server (runs migrations, applies seed)
+npx emdash dev --types      # Start and generate types from schema
+```
+
+The admin UI is at `http://localhost:4321/_emdash/admin`. On first run, you'll go through setup to create an admin account.