fix: use resolveStateDir() for node-pairing and voicewake storage

Both node-pairing.ts and voicewake.ts were using a local defaultBaseDir()
that hardcoded ~/.clawdbot, ignoring CLAWDBOT_STATE_DIR.

This caused nodes/paired.json and settings/voicewake.json to be stored
in ~/.clawdbot instead of the configured state directory.

Fixes the bug where paired nodes config was stored in a different
location than the rest of the gateway state.

src/infra/node-pairing.ts

@@ -1,7 +1,7 @@
 import { randomUUID } from "node:crypto";
 import fs from "node:fs/promises";
-import os from "node:os";
 import path from "node:path";
+import { resolveStateDir } from "../config/paths.js";
 
 export type NodePairingPendingRequest = {
   requestId: string;
@@ -48,12 +48,8 @@ type NodePairingStateFile = {
 
 const PENDING_TTL_MS = 5 * 60 * 1000;
 
-function defaultBaseDir() {
-  return path.join(os.homedir(), ".clawdbot");
-}
-
 function resolvePaths(baseDir?: string) {
-  const root = baseDir ?? defaultBaseDir();
+  const root = baseDir ?? resolveStateDir();
   const dir = path.join(root, "nodes");
   return {
     dir,

src/infra/voicewake.ts

@@ -1,7 +1,7 @@
 import { randomUUID } from "node:crypto";
 import fs from "node:fs/promises";
-import os from "node:os";
 import path from "node:path";
+import { resolveStateDir } from "../config/paths.js";
 
 export type VoiceWakeConfig = {
   triggers: string[];
@@ -10,12 +10,8 @@ export type VoiceWakeConfig = {
 
 const DEFAULT_TRIGGERS = ["clawd", "claude", "computer"];
 
-function defaultBaseDir() {
-  return path.join(os.homedir(), ".clawdbot");
-}
-
 function resolvePath(baseDir?: string) {
-  const root = baseDir ?? defaultBaseDir();
+  const root = baseDir ?? resolveStateDir();
   return path.join(root, "settings", "voicewake.json");
 }