Extract SupportedMimeType to decorator-free runtime-common subpath

Move SupportedMimeType enum from router.ts to a standalone
supported-mime-type.ts in @cardstack/runtime-common. This subpath has
no transitive imports of decorator-using modules, making it safe for
Playwright's TypeScript loader which doesn't support experimentalDecorators.

- Add packages/runtime-common/supported-mime-type.ts
- Remove packages/software-factory/src/mime-types.ts (local copy)
- All software-factory files import from @cardstack/runtime-common/supported-mime-type
- Barrel re-export and router.ts updated to use the new source

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: habdelra

packages/runtime-common/index.ts

@@ -309,7 +309,7 @@ export const isNode =
   Object.prototype.toString.call((globalThis as any).process) ===
   '[object process]';
 
-export { SupportedMimeType } from './router';
+export { SupportedMimeType } from './supported-mime-type';
 export {
   isUrlLike,
   VirtualNetwork,

packages/runtime-common/router.ts

@@ -47,26 +47,7 @@ function formatUnknownError(error: unknown): string {
 
 export type Method = 'GET' | 'QUERY' | 'POST' | 'PATCH' | 'DELETE' | 'HEAD';
 
-/* eslint-disable @typescript-eslint/no-duplicate-enum-values */
-export enum SupportedMimeType {
-  CardJson = 'application/vnd.card+json',
-  CardSource = 'application/vnd.card+source',
-  FileMeta = 'application/vnd.card.file-meta+json',
-  DirectoryListing = 'application/vnd.api+json',
-  RealmInfo = 'application/vnd.api+json',
-  Mtimes = 'application/vnd.api+json',
-  Permissions = 'application/vnd.api+json',
-  Session = 'application/json',
-  EventStream = 'text/event-stream',
-  HTML = 'text/html',
-  JSONAPI = 'application/vnd.api+json',
-  JSON = 'application/json',
-  CardDependencies = 'application/json',
-  CardTypeSummary = 'application/json',
-  OctetStream = 'application/octet-stream',
-  All = '*/*',
-}
-/* eslint-enable @typescript-eslint/no-duplicate-enum-values */
+export { SupportedMimeType } from './supported-mime-type';
 
 function isHTTPMethod(method: unknown): method is Method {
   if (typeof method !== 'string') {

packages/runtime-common/supported-mime-type.ts

@@ -0,0 +1,20 @@
+/* eslint-disable @typescript-eslint/no-duplicate-enum-values */
+export enum SupportedMimeType {
+  CardJson = 'application/vnd.card+json',
+  CardSource = 'application/vnd.card+source',
+  FileMeta = 'application/vnd.card.file-meta+json',
+  DirectoryListing = 'application/vnd.api+json',
+  RealmInfo = 'application/vnd.api+json',
+  Mtimes = 'application/vnd.api+json',
+  Permissions = 'application/vnd.api+json',
+  Session = 'application/json',
+  EventStream = 'text/event-stream',
+  HTML = 'text/html',
+  JSONAPI = 'application/vnd.api+json',
+  JSON = 'application/json',
+  CardDependencies = 'application/json',
+  CardTypeSummary = 'application/json',
+  OctetStream = 'application/octet-stream',
+  All = '*/*',
+}
+/* eslint-enable @typescript-eslint/no-duplicate-enum-values */

packages/software-factory/scripts/factory-tools-smoke.ts

@@ -8,7 +8,7 @@
  *   pnpm factory:tools-smoke
  */
 
-import { SupportedMimeType } from '../src/mime-types';
+import { SupportedMimeType } from '@cardstack/runtime-common/supported-mime-type';
 
 import type { AgentAction } from './lib/factory-agent';
 import {

packages/software-factory/scripts/lib/factory-agent.ts

@@ -1,4 +1,4 @@
-import { SupportedMimeType } from '../../src/mime-types';
+import { SupportedMimeType } from '@cardstack/runtime-common/supported-mime-type';
 
 import { createBoxelRealmFetch } from '../../src/realm-auth';
 

packages/software-factory/scripts/lib/factory-tool-executor.ts

@@ -1,7 +1,7 @@
 import { spawn } from 'node:child_process';
 import { resolve } from 'node:path';
 
-import { SupportedMimeType } from '../../src/mime-types';
+import { SupportedMimeType } from '@cardstack/runtime-common/supported-mime-type';
 import {
   iconURLFor,
   getRandomBackgroundURL,

packages/software-factory/scripts/lib/realm-operations.ts

@@ -15,7 +15,7 @@ import {
   getRandomBackgroundURL,
 } from '@cardstack/runtime-common/realm-display-defaults';
 
-import { SupportedMimeType } from '../../src/mime-types';
+import { SupportedMimeType } from '@cardstack/runtime-common/supported-mime-type';
 
 export { SupportedMimeType };
 

packages/software-factory/src/factory-bootstrap.ts

@@ -1,4 +1,4 @@
-import { SupportedMimeType } from './mime-types';
+import { SupportedMimeType } from '@cardstack/runtime-common/supported-mime-type';
 
 import type { FactoryBrief } from './factory-brief';
 import { formatErrorResponse, formatUnknownError } from './error-format';

packages/software-factory/src/factory-brief.ts

@@ -1,6 +1,6 @@
 import type { LooseSingleCardDocument } from '@cardstack/runtime-common';
 
-import { SupportedMimeType } from './mime-types';
+import { SupportedMimeType } from '@cardstack/runtime-common/supported-mime-type';
 
 const markdownLinkPattern = /\[([^\]]+)\]\([^)]+\)/g;
 const wikiLinkPattern = /\[\[([^[\]]+)\]\]/g;

packages/software-factory/src/factory-target-realm.ts

@@ -4,7 +4,7 @@ import {
   iconURLFor,
   getRandomBackgroundURL,
 } from '@cardstack/runtime-common/realm-display-defaults';
-import { SupportedMimeType } from '@cardstack/runtime-common/router';
+import { SupportedMimeType } from '@cardstack/runtime-common/supported-mime-type';
 
 import {
   getAccessibleRealmTokens,