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/core/tests/unit/astro/vite-config.test.ts

@@ -0,0 +1,140 @@
+import { basename } from "node:path";
+
+import type { AstroConfig } from "astro";
+import { describe, expect, it } from "vitest";
+
+import { createViteConfig } from "../../../src/astro/integration/vite-config.js";
+
+describe("createViteConfig admin aliasing", () => {
+	const monorepoDemoRoot = new URL("../../../../../demos/simple/", import.meta.url);
+	const externalProjectRoot = new URL("file:///workspace/emdash-site/");
+	const siblingProjectRoot = new URL("../../../../../../emdash-site/", import.meta.url);
+	const adminSourcePattern = /[/\\]packages[/\\]admin[/\\]src$/;
+	const adminDistPattern = /[/\\]packages[/\\]admin[/\\]dist$/;
+
+	function buildConfig(root: URL, command: "dev" | "build" | "preview" | "sync" = "dev") {
+		return createViteConfig(
+			{
+				serializableConfig: {},
+				resolvedConfig: {} as never,
+				pluginDescriptors: [],
+				astroConfig: {
+					root,
+					adapter: { name: "@astrojs/node" },
+				} as AstroConfig,
+			},
+			command,
+		);
+	}
+
+	function getAdminAliasReplacement(config: ReturnType<typeof createViteConfig>) {
+		const aliases = Array.isArray(config.resolve?.alias) ? config.resolve.alias : [];
+		const adminAlias = aliases.find(
+			(alias) =>
+				typeof alias === "object" &&
+				alias !== null &&
+				"find" in alias &&
+				alias.find === "@emdash-cms/admin" &&
+				"replacement" in alias,
+		);
+
+		if (!adminAlias || typeof adminAlias.replacement !== "string") {
+			throw new Error("Missing @emdash-cms/admin alias");
+		}
+
+		return adminAlias.replacement;
+	}
+
+	it("uses raw admin source for local monorepo dev", () => {
+		const config = buildConfig(monorepoDemoRoot);
+		const replacement = getAdminAliasReplacement(config);
+
+		expect(basename(replacement)).toBe("src");
+		expect(replacement).toMatch(adminSourcePattern);
+	});
+
+	it("uses built admin dist for external app dev", () => {
+		const config = buildConfig(externalProjectRoot);
+		const replacement = getAdminAliasReplacement(config);
+
+		expect(basename(replacement)).toBe("dist");
+		expect(replacement).toMatch(adminDistPattern);
+	});
+
+	it("uses built admin dist for sibling paths with a matching prefix", () => {
+		const config = buildConfig(siblingProjectRoot);
+		const replacement = getAdminAliasReplacement(config);
+
+		expect(basename(replacement)).toBe("dist");
+		expect(replacement).toMatch(adminDistPattern);
+	});
+
+	it("uses built admin dist outside dev", () => {
+		const config = buildConfig(monorepoDemoRoot, "build");
+		const replacement = getAdminAliasReplacement(config);
+
+		expect(basename(replacement)).toBe("dist");
+		expect(replacement).toMatch(adminDistPattern);
+	});
+});
+
+describe("createViteConfig use-sync-external-store shim aliasing", () => {
+	const externalProjectRoot = new URL("file:///workspace/emdash-site/");
+
+	function buildConfig(adapter: string) {
+		return createViteConfig(
+			{
+				serializableConfig: {},
+				resolvedConfig: {} as never,
+				pluginDescriptors: [],
+				astroConfig: {
+					root: externalProjectRoot,
+					adapter: { name: adapter },
+				} as AstroConfig,
+			},
+			"dev",
+		);
+	}
+
+	function getAlias(config: ReturnType<typeof createViteConfig>, find: string) {
+		const aliases = Array.isArray(config.resolve?.alias) ? config.resolve.alias : [];
+		return aliases.find(
+			(alias) =>
+				typeof alias === "object" && alias !== null && "find" in alias && alias.find === find,
+		);
+	}
+
+	// Regression: with pnpm + React 18+, @tiptap/react pulls in
+	// `use-sync-external-store/shim` (CJS). Vite can't pre-bundle from the
+	// virtual store, so browsers get raw CJS and InlinePortableTextEditor
+	// fails to hydrate. The aliases redirect the shim to the main package,
+	// which delegates to React's built-in hook on React >=18.
+	for (const adapter of ["@astrojs/node", "@astrojs/cloudflare"] as const) {
+		it(`redirects use-sync-external-store/shim to the main package on ${adapter}`, () => {
+			const config = buildConfig(adapter);
+
+			const indexAlias = getAlias(config, "use-sync-external-store/shim/index.js");
+			const shimAlias = getAlias(config, "use-sync-external-store/shim");
+
+			expect(indexAlias).toMatchObject({ replacement: "use-sync-external-store" });
+			expect(shimAlias).toMatchObject({ replacement: "use-sync-external-store" });
+		});
+
+		it(`lists the more-specific shim alias before the directory alias on ${adapter}`, () => {
+			const config = buildConfig(adapter);
+			const aliases = Array.isArray(config.resolve?.alias) ? config.resolve.alias : [];
+
+			const findIndex = (find: string) =>
+				aliases.findIndex(
+					(alias) =>
+						typeof alias === "object" && alias !== null && "find" in alias && alias.find === find,
+				);
+
+			const indexIdx = findIndex("use-sync-external-store/shim/index.js");
+			const shimIdx = findIndex("use-sync-external-store/shim");
+
+			expect(indexIdx).toBeGreaterThanOrEqual(0);
+			expect(shimIdx).toBeGreaterThan(indexIdx);
+		});
+	}
+});