feat(desktop): polish credentials settings and messaging env routing (#39217)

* feat(desktop): polish credentials settings and messaging env routing

Align Provider API Keys and Tools & Keys with Advanced ListRow inputs,
add Tools & Keys sidebar subnav, move platform env vars to Messaging via
channel_managed discovery, strip toolset emojis, and condense cron actions.

Co-authored-by: Cursor <cursoragent@cursor.com>

* fix(desktop): align Messaging credential inputs with settings ListRow style

Remove monospace inputs and use CREDENTIAL_CONTROL_CLASS + ListRow layout
to match Provider API Keys and Tools & Keys.

Co-authored-by: Cursor <cursoragent@cursor.com>

---------

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/hermes_cli/test_web_server.py

@@ -791,6 +791,24 @@ class TestWebServerEndpoints:
         for key, info in data.items():
             assert info["channel_managed"] is (key in channel_keys)
 
+    def test_platform_scoped_messaging_env_vars_are_channel_managed(self):
+        from hermes_cli.web_server import (
+            _MESSAGING_KEYS_PAGE_KEYS,
+            _build_catalog_entry,
+            _channel_managed_env_keys,
+        )
+
+        discord = _build_catalog_entry("discord")
+        assert "DISCORD_HOME_CHANNEL" in discord["env_vars"]
+        assert "DISCORD_ALLOW_ALL_USERS" in discord["env_vars"]
+
+        managed = _channel_managed_env_keys()
+        assert "DISCORD_HOME_CHANNEL" in managed
+        assert "BLUEBUBBLES_ALLOW_ALL_USERS" in managed
+        assert "MATTERMOST_ALLOW_ALL_USERS" in managed
+        assert "GATEWAY_PROXY_URL" not in managed
+        assert "GATEWAY_PROXY_URL" in _MESSAGING_KEYS_PAGE_KEYS
+
     def test_reveal_env_var(self, tmp_path):
         """POST /api/env/reveal should return the real unredacted value."""
         from hermes_cli.config import save_env_value
@@ -1919,7 +1937,7 @@ class TestNewEndpoints:
         assert resp.json() == [
             {
                 "name": "web",
-                "label": "🔍 Web Search & Scraping",
+                "label": "Web Search & Scraping",
                 "description": "web_search, web_extract",
                 "enabled": True,
                 "available": True,
@@ -1928,7 +1946,7 @@ class TestNewEndpoints:
             },
             {
                 "name": "skills",
-                "label": "📚 Skills",
+                "label": "Skills",
                 "description": "list, view, manage",
                 "enabled": True,
                 "available": True,
@@ -1937,7 +1955,7 @@ class TestNewEndpoints:
             },
             {
                 "name": "memory",
-                "label": "💾 Memory",
+                "label": "Memory",
                 "description": "persistent memory across sessions",
                 "enabled": False,
                 "available": False,