refactor: eliminate remaining 15 any warnings and ratchet rule to error

- TaskCard: four catch((err: any) => err.message) promise handlers in
  archive/unarchive/delete/move → catch((err) => getErrorMessage(err)).
- InlineCreateCard + QuickEntryBox: .catch((err: any)) model-load handlers
  → getErrorMessage(err) with existing @fusion/core import.
- TerminalModal: drop (navigator as any).maxTouchPoints — modern lib.dom
  types already expose the property.
- serve.ts: remove unused any annotation on OpenRouter model mapper; the
  array element type is already inferred from json.data.
- pi.js, runtime-resolution.ts, dashboard.ts, serve.ts, dev-server-port-
  detect.ts, devserver-manager.ts: drop now-stale eslint-disable comments
  that the cleanup made redundant.

Fix a prompt-builder regression surfaced by agent's `any` cleanup: toolCall
with a raw string `arguments` field must be preserved verbatim (JSON-quoted)
rather than coerced to `{}`; restores a previously-passing test.

Then promote @typescript-eslint/no-explicit-any from warn → error. Future
new anys must either come with a one-line disable + justification or use a
real type. Workspace is now lint-clean (0 problems).

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

packages/engine/src/pi.js

@@ -4,7 +4,6 @@
  * Uses Fusion auth for writes and legacy pi auth as a read-only fallback.
  * Provides factory functions for creating triage and executor agent sessions.
  */
-/* eslint-disable @typescript-eslint/no-explicit-any */
 import { existsSync, readFileSync } from "node:fs";
 import { exec } from "node:child_process";
 import { promisify } from "node:util";

packages/engine/src/runtime-resolution.ts

@@ -78,7 +78,6 @@ export class DefaultPiRuntime implements AgentRuntime {
   readonly name = "Default PI Runtime";
 
   // Synchronous cached describeModel function
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   private static describeModelFn: ((session: AgentSession) => string) | null = null;
 
   /**
@@ -223,7 +222,6 @@ function wrapPluginRuntime(
     describeModel: (session: AgentSession) => {
       const adapter = instance as Record<string, unknown>;
       if (typeof adapter.describeModel === "function") {
-        // eslint-disable-next-line @typescript-eslint/no-explicit-any
         return (adapter.describeModel as (s: AgentSession) => string)(session);
       }
       // Fallback to default pi describeModel - use cached sync function