Hide mic toggle UI until upstream /voice WSL detection is fixed

Claude Code's /voice command incorrectly detects containers running
on WSL2 hosts as unsupported WSL environments. Remove the mic button
from project cards and microphone settings from the settings panel,
but keep useVoice hook and MicrophoneSettings component for re-enabling
once the upstream issue is resolved.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/src/components/settings/SettingsPanel.tsx

@@ -2,7 +2,6 @@ import { useState, useEffect } from "react";
 import ApiKeyInput from "./ApiKeyInput";
 import DockerSettings from "./DockerSettings";
 import AwsSettings from "./AwsSettings";
-import MicrophoneSettings from "./MicrophoneSettings";
 import { useSettings } from "../../hooks/useSettings";
 import { useUpdates } from "../../hooks/useUpdates";
 import ClaudeInstructionsModal from "../projects/ClaudeInstructionsModal";
@@ -60,8 +59,6 @@ export default function SettingsPanel() {
       <DockerSettings />
       <AwsSettings />
 
-      <MicrophoneSettings />
-
       {/* Container Timezone */}
       <div>
         <label className="block text-sm font-medium mb-1">Container Timezone</label>