feat: add fork-based ownership and fix MCP non-scoped package names

Fork-based ownership:
- Add forkedFromId, forkCount fields to Collection and Agent models
- Add fork-status API endpoints for collections and agents
- Add ForkButton and ForkedFromBadge UI components
- Update clone endpoints to set forkedFromId and increment forkCount
- Add COLLECTION_FORKED and AGENT_FORKED activity types
- Enforce owner-only access for MCP tool execution and agent chat

MCP fix:
- Fix parseToolName to handle non-scoped packages like firecrawl-aisdk
- Try both scoped (@scope/name) and literal (name-with-hyphens) interpretations
- Pass collection envVars to tool executor for API key support

packages/types/src/agent.ts

@@ -169,6 +169,8 @@ export const AgentSchema = z.object({
   isPublic: z.boolean(),
   toolCount: z.number(),
   collectionCount: z.number(),
+  forkCount: z.number().default(0),
+  forkedFromId: z.string().nullable().optional(),
   createdAt: z.date(),
   updatedAt: z.date(),
 });

packages/types/src/collection.ts

@@ -107,6 +107,8 @@ export const CollectionSchema = z.object({
   description: z.string().nullable(),
   isPublic: z.boolean(),
   toolCount: z.number(),
+  forkCount: z.number().default(0),
+  forkedFromId: z.string().nullable().optional(),
   createdAt: z.date(),
   updatedAt: z.date(),
 });