chore: clear pre-existing lint warnings

Annotate the intentional NUL-byte regex in log-sink, drop two stale
eslint-disable directives whose underlying any-uses are gone, and swap
@ts-ignore for @ts-expect-error in routes.test.ts.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/cli/src/commands/dashboard-tui/log-sink.ts

@@ -5,6 +5,7 @@ import type { LogEntry } from "./log-ring-buffer.js";
 // The engine's createLogger() prefixes messages with a null-byte-delimited
 // severity marker so we can recover the original intent when routed via
 // console.error (which is the transport it uses).
+// eslint-disable-next-line no-control-regex -- marker is NUL-delimited by design
 const LOG_LEVEL_MARKER_REGEX = /^\u0000fnlvl=(info|warn|error)\u0000\s*/;
 
 /**

packages/dashboard/app/__tests__/auth.test.ts

@@ -73,8 +73,7 @@ describe("installAuthFetch", () => {
     window.localStorage.clear();
     window.history.replaceState({}, "", "/");
     window.fetch = originalFetch;
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any -- test cleanup for sentinel
-    delete (window as any).__fnAuthFetchInstalled;
+    delete (window as Window & { __fnAuthFetchInstalled?: boolean }).__fnAuthFetchInstalled;
   });
 
   it("injects Authorization only for same-origin /api requests", async () => {

packages/dashboard/src/__tests__/routes-skills.test.ts

@@ -1,4 +1,3 @@
-/* eslint-disable @typescript-eslint/no-explicit-any */
 import { describe, it, expect, vi } from "vitest";
 import { EventEmitter } from "node:events";
 import type { Task } from "@fusion/core";

packages/dashboard/src/__tests__/routes.test.ts

@@ -8944,7 +8944,7 @@ describe("Planning Mode Routes", () => {
           question: "What is your preference?",
           description: "Please choose",
         };
-        // @ts-ignore - accessing internal state for testing
+        // @ts-expect-error - accessing internal state for testing
         session!.currentQuestion = mockQuestion;
 
         // Broadcast a complete event after a short delay so the stream ends