Add instance data dashboard (default off).

Read-only overview of live orders, key monitors, and strategy; show options/hedge only when present. Toggle via system settings nav prefs.

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

tests/test_instance_display_env_settings.py

@@ -15,12 +15,19 @@ class TestInstanceDisplayPrefs(unittest.TestCase):
         prefs = normalize_display_prefs({})
         self.assertTrue(prefs["show_nav_env_config"])
         self.assertTrue(prefs["show_settings_password"])
+        self.assertFalse(prefs["show_nav_dashboard"])
 
     def test_tab_allowed_respects_prefs(self):
         prefs = normalize_display_prefs({"show_nav_stats": False})
         self.assertFalse(tab_allowed("stats", prefs))
         self.assertTrue(tab_allowed("trade", prefs))
 
+    def test_dashboard_nav_default_off(self):
+        prefs = normalize_display_prefs({})
+        self.assertFalse(tab_allowed("dashboard", prefs))
+        on = normalize_display_prefs({"show_nav_dashboard": True})
+        self.assertTrue(tab_allowed("dashboard", on))
+
 
 class TestEnvFileLib(unittest.TestCase):
     def test_upsert_and_read(self):