Update fish variables and add new br function; modify zed settings

zed/settings.json

@@ -7,10 +7,25 @@
 // custom settings, run `zed: open default settings` from the
 // command palette (cmd-shift-p / ctrl-shift-p)
 {
-    "vim_mode": true,
+    "agent": {
+        "inline_assistant_model": {
+            "provider": "copilot_chat",
+            "model": "gemini-3.1-pro-preview",
+            "enable_thinking": false
+        },
+        "default_model": {
+            "provider": "copilot_chat",
+            "model": "gpt-5-mini",
+            "enable_thinking": false
+        },
+        "favorite_models": [],
+        "model_parameters": []
+    },
     "agent_servers": {
-        "codex": {
+        "codex-acp": {
+            "type": "registry",
             "default_config_options": {
+                "mode": "auto",
                 "reasoning_effort": "xhigh"
             }
         }
@@ -35,7 +50,11 @@
     },
     "show_wrap_guides": true,
     "title_bar": {
+        "show_user_picture": false,
+        "show_user_menu": false,
         "show_sign_in": false,
+        "show_project_items": true,
+        "show_branch_icon": false,
     },
     "git_panel": {
         "default_width": 280.0,