## Problem
Dashboard typecheck fails with **TS2416** in `@fusion/core`'s
`TaskStore`:
```
Property 'emit' in type 'TaskStore' is not assignable to the same property in base type 'EventEmitter<TaskStoreEvents>'.
```
The `override emit<E extends string | symbol>(event, ...args)` generic
conflicts with the base class's generic `emit<K>(eventName: keyof
TaskStoreEvents | K, ...)`. This breaks the dashboard typecheck / CI
merge gate.
## Fix
Change the override to:
```ts
override emit(event: unknown, ...args: any[]): boolean {
return EventEmitter.prototype.emit.call(this, event as string, ...args);
}
```
`event: unknown` remains assignable to the base's generic signature
while still forwarding non-typed runtime keys (`agent:log`,
`settings:updated`, …). Internal `EventEmitter.prototype.emit` calls
cast `event as string`. Behavior-preserving.
## Verification
- `@fusion/dashboard` `tsc --noEmit` → **PASS** (previously failed with
TS2416)
- `eslint` on touched file → clean
- Single-file change (`packages/core/src/store.ts`, +6/−3)
## Scope
No behavior change, no changesets required.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Improved task event handling to support a broader range of event
identifiers.
* Preserved cached-lane information for single-argument task update
events.
* Maintained support for custom and arbitrary event names without
disrupting existing behavior.
* Improved classification of workflow roles, session purposes, and
outcome-related status checks in lifecycle analysis, producing more
accurate findings and reducing misleading results.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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