feat(desktop): polish desktop shell and shared WebUI surfaces (#4195)

* feat(desktop): add native host scaffold

* feat(webui): track turns and usage in gateway

* feat(webui): polish desktop chat experience

* feat(apps): add ArcGIS and Joplin logos

* feat(desktop): polish shell and shared surfaces

* fix(webui): avoid preview chips for glob references

* test: align CI expectations for token fallback

* feat(webui): preview prompt rail entries

* feat(webui): add prompt navigator drawer

* style(webui): refine prompt navigator placement

* style(webui): align prompt navigator with header actions

* style(webui): simplify prompt navigator header

* refactor(webui): clean thread resource refresh

* feat(desktop): add native reply notifications

* fix(webui): preserve desktop restart and replay state

* fix(desktop): harden gateway proxy startup

* fix(web): fall back when readability is unavailable

* fix(desktop): hide window instead of closing on macos

* fix(webui): unify desktop header actions

* fix(webui): simplify prompt history rows

* fix(desktop): log notification delivery failures

* chore(desktop): clean source package artifacts

* fix(cron): support one-time relative reminders

* fix(webui): reveal scroll button in place

* Revert "fix(cron): support one-time relative reminders"

This reverts commit 4c4661da120a3c7283e0768412bae48604e7390b.

* refactor(webui): extract token usage heatmap

* docs(desktop): clarify contributor guides

---------

Co-authored-by: chengyongru <2755839590@qq.com>

nanobot/webui/settings_api.py

@@ -23,6 +23,7 @@ from nanobot.providers.image_generation import (
 )
 from nanobot.providers.registry import PROVIDERS, find_by_name
 from nanobot.security.workspace_access import workspace_sandbox_status
+from nanobot.webui.token_usage import token_usage_payload
 from nanobot.webui.workspaces import (
     read_webui_default_access_mode,
     write_webui_default_access_mode,
@@ -747,6 +748,7 @@ def settings_payload(
             },
             "unified_session": defaults.unified_session,
         },
+        "usage": token_usage_payload(timezone_name=defaults.timezone),
         "advanced": {
             "restrict_to_workspace": config.tools.restrict_to_workspace,
             "workspace_sandbox": sandbox_status.as_dict(),
@@ -771,6 +773,12 @@ def settings_payload(
     )
 
 
+def settings_usage_payload() -> dict[str, Any]:
+    """Return the lightweight token usage slice for Overview refreshes."""
+    config = load_config()
+    return token_usage_payload(timezone_name=config.agents.defaults.timezone)
+
+
 def update_agent_settings(query: QueryParams) -> dict[str, Any]:
     config = load_config()
     defaults = config.agents.defaults