fix: harden salvaged session and browser improvements

Polish salvaged contributor work before PR review:
- read browser inactivity timeout from config with documented fallback
- skip redundant v10 trigram backfill before v11 FTS rebuild
- show delegate_task goals safely in progress previews
- show gateway status model/context without redundant token wording
- wire gateway /sessions to shared session-listing helpers
- map Ravenwolf author emails for release attribution

Co-authored-by: Wolfram Ravenwolf <github.com@wolfram.ravenwolf.de>
Co-authored-by: Amy Ravenwolf <amy@ravenwolf.de>

tools/browser_tool.py

@@ -67,7 +67,7 @@ from pathlib import Path
 from agent.auxiliary_client import call_llm
 from hermes_constants import get_hermes_home
 from utils import env_int, is_truthy_value
-from hermes_cli.config import cfg_get
+from hermes_cli.config import DEFAULT_CONFIG, cfg_get
 
 try:
     from tools.website_policy import check_website_access
@@ -1180,8 +1180,13 @@ _cleanup_done = False
 # Session inactivity timeout (seconds) - cleanup if no activity for this long.
 # config.yaml is authoritative; BROWSER_INACTIVITY_TIMEOUT remains a legacy
 # fallback so old deployments keep working if they have not migrated yet.
+DEFAULT_SESSION_INACTIVITY_TIMEOUT = int(
+    DEFAULT_CONFIG.get("browser", {}).get("inactivity_timeout", 120)
+)
+
+
 def _get_session_inactivity_timeout() -> int:
-    result = env_int("BROWSER_INACTIVITY_TIMEOUT", 300)
+    result = env_int("BROWSER_INACTIVITY_TIMEOUT", DEFAULT_SESSION_INACTIVITY_TIMEOUT)
     try:
         from hermes_cli.config import read_raw_config
         cfg = read_raw_config()