refactor(permission-system): simplify policy and autoreview flow

pi-permission-system/src/tool-registry.ts

@@ -1,12 +1,9 @@
 import { getNonEmptyString, toRecord } from "./value-guards";
 
-/** Narrow interface for the Pi tool API subset used by handler classes. */
+/** Narrow interface for the read-only Pi tool registry used by the gate. */
 export interface ToolRegistry {
   /** All registered tools (`pi.getAllTools()` — `ToolInfo[]`); kept defensively wide. */
   getAll(): unknown[];
-  /** Currently active tool names (`pi.getActiveTools()`). */
-  getActive(): string[];
-  setActive(names: string[]): void;
 }
 
 export type ToolRegistrationCheckResult =