fix(ext/sw): review fixes — storage key, timer reset scope, imports

- Rename storage key sessionTimeoutConfig → session_timeout (plan spec)
- Only call resetTimer() for non-content-script message types so content
  script polling cannot keep the session alive
- Collapse two same-module imports into one line; add CONTENT_CALLABLE_TYPES

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

extension/src/service-worker/index.ts

@@ -1,8 +1,8 @@
 /// Thin service-worker entry: loads WASM, constructs the router state, and
 /// forwards every message into router/index.route().
 
-import type { Request, Response } from '../shared/messages';
+import type { Request, Response, SessionTimeoutConfig } from '../shared/messages';
-import type { SessionTimeoutConfig } from '../shared/messages';
+import { CONTENT_CALLABLE_TYPES } from '../shared/messages';
 import type { RouterState } from './router/index';
 import { route } from './router/index';
 import * as vault from './vault';
@@ -58,16 +58,18 @@ sessionTimer.onExpired(() => {
 });
 
 // Restore saved session config from chrome.storage.local on SW startup.
-chrome.storage.local.get('sessionTimeoutConfig').then((r) => {
+chrome.storage.local.get('session_timeout').then((r) => {
-  if (r.sessionTimeoutConfig) {
+  if (r.session_timeout) {
-    sessionTimer.setConfig(r.sessionTimeoutConfig as SessionTimeoutConfig);
+    sessionTimer.setConfig(r.session_timeout as SessionTimeoutConfig);
   }
 }).catch(() => {});
 
 chrome.runtime.onMessage.addListener(
   (request: Request, sender: chrome.runtime.MessageSender, sendResponse: (r: Response) => void) => {
     (async () => {
-      sessionTimer.resetTimer();
+      if (!CONTENT_CALLABLE_TYPES.has(request.type as never)) {
+        sessionTimer.resetTimer();
+      }
       if (!state.wasm) {
         // eslint-disable-next-line no-console
         console.log('[relicario sw] initializing WASM on first message');

extension/src/service-worker/router/popup-only.ts

@@ -361,7 +361,7 @@ export async function handle(
     case 'update_session_config': {
       sessionTimer.setConfig(msg.config);
       sessionTimer.resetTimer();
-      await chrome.storage.local.set({ sessionTimeoutConfig: msg.config });
+      await chrome.storage.local.set({ session_timeout: msg.config });
       return { ok: true };
     }
   }