refactor: unify peer kind to ChatType, rename dm to direct (#11881)

* fix: use .js extension for ESM imports of RoutePeerKind

The imports incorrectly used .ts extension which doesn't resolve
with moduleResolution: NodeNext. Changed to .js and added 'type'
import modifier.

* fix tsconfig

* refactor: unify peer kind to ChatType, rename dm to direct

- Replace RoutePeerKind with ChatType throughout codebase
- Change 'dm' literal values to 'direct' in routing/session keys
- Keep backward compat: normalizeChatType accepts 'dm' -> 'direct'
- Add ChatType export to plugin-sdk, deprecate RoutePeerKind
- Update session key parsing to accept both 'dm' and 'direct' markers
- Update all channel monitors and extensions to use ChatType

BREAKING CHANGE: Session keys now use 'direct' instead of 'dm'.
Existing 'dm' keys still work via backward compat layer.

* fix tests

* test: update session key expectations for dmdirect migration

- Fix test expectations to expect :direct: in generated output
- Add explicit backward compat test for normalizeChatType('dm')
- Keep input test data with :dm: keys to verify backward compat

* fix: accept legacy 'dm' in session key parsing for backward compat

getDmHistoryLimitFromSessionKey now accepts both :dm: and :direct:
to ensure old session keys continue to work correctly.

* test: add explicit backward compat tests for dmdirect migration

- session-key.test.ts: verify both :dm: and :direct: keys are valid
- getDmHistoryLimitFromSessionKey: verify both formats work

* feat: backward compat for resetByType.dm config key

* test: skip unix-path Nix tests on Windows

src/routing/resolve-route.ts

@@ -1,5 +1,7 @@
+import type { ChatType } from "../channels/chat-type.js";
 import type { OpenClawConfig } from "../config/config.js";
 import { resolveDefaultAgentId } from "../agents/agent-scope.js";
+import { normalizeChatType } from "../channels/chat-type.js";
 import { listBindings } from "./bindings.js";
 import {
   buildAgentMainSessionKey,
@@ -10,10 +12,11 @@ import {
   sanitizeAgentId,
 } from "./session-key.js";
 
-export type RoutePeerKind = "dm" | "group" | "channel";
+/** @deprecated Use ChatType from channels/chat-type.js */
+export type RoutePeerKind = ChatType;
 
 export type RoutePeer = {
-  kind: RoutePeerKind;
+  kind: ChatType;
   id: string;
 };
 
@@ -89,7 +92,7 @@ export function buildAgentSessionKey(params: {
     mainKey: DEFAULT_MAIN_KEY,
     channel,
     accountId: params.accountId,
-    peerKind: peer?.kind ?? "dm",
+    peerKind: peer?.kind ?? "direct",
     peerId: peer ? normalizeId(peer.id) || "unknown" : null,
     dmScope: params.dmScope,
     identityLinks: params.identityLinks,
@@ -137,7 +140,8 @@ function matchesPeer(
   if (!m) {
     return false;
   }
-  const kind = normalizeToken(m.kind);
+  // Backward compat: normalize "dm" to "direct" in config match rules
+  const kind = normalizeChatType(m.kind);
   const id = normalizeId(m.id);
   if (!kind || !id) {
     return false;