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>

tests/agent/test_loop_save_turn.py

@@ -592,16 +592,16 @@ async def test_internal_continuation_queues_turn_without_fake_user_history(
                 "paused",
                 [],
                 [*initial_messages, {"role": "assistant", "content": "paused"}],
-                "max_iterations",
-                False,
-            )
+                    "max_iterations",
+                    False,
+                )
         return (
             "done",
             [],
             [*initial_messages, {"role": "assistant", "content": "done"}],
-            "completed",
-            False,
-        )
+                "completed",
+                False,
+            )
 
     loop._run_agent_loop = fake_run_agent_loop  # type: ignore[method-assign]
     pending: asyncio.Queue[InboundMessage] = asyncio.Queue()
@@ -665,9 +665,9 @@ async def test_internal_continuation_preserves_streaming_route_metadata(
                 "paused",
                 [],
                 [*initial_messages, {"role": "assistant", "content": "paused"}],
-                "max_iterations",
-                False,
-            )
+                    "max_iterations",
+                    False,
+                )
         assert on_stream is not None
         assert on_stream_end is not None
         await on_stream("done")
@@ -744,9 +744,9 @@ async def test_websocket_internal_continuation_keeps_single_visible_run(
                 "paused",
                 [],
                 [*initial_messages, {"role": "assistant", "content": "paused"}],
-                "max_iterations",
-                False,
-            )
+                    "max_iterations",
+                    False,
+                )
         return (
             "done",
             [],