refactor: 将共用代码迁入 lib/ 模块化目录

统一 strategy、key_monitor、trade、hub 等共用库到 lib/ 子包，并补充 lib-structure 文档，便于四所与中控维护。

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

tests/test_instance_embed_context_lib.py

@@ -1,28 +1,28 @@
-from instance_embed_context_lib import embed_render_plan, trade_records_summary
-
-
-def test_embed_fragment_trade_is_light():
-    plan = embed_render_plan("trade", "fragment")
-    assert plan.exchange_capitals is False
-    assert plan.records_rows is False
-    assert plan.records_summary is False
-    assert plan.orders is True
-    assert plan.key_history is False
-
-
-def test_embed_shell_trade_summary_only():
-    plan = embed_render_plan("trade", "shell")
-    assert plan.exchange_capitals is True
-    assert plan.records_summary is True
-    assert plan.records_rows is False
-
-
-def test_embed_records_page_loads_rows():
-    plan = embed_render_plan("records", "fragment")
-    assert plan.records_rows is True
-
-
-def test_full_page_unchanged():
-    plan = embed_render_plan("trade", None)
-    assert plan.records_rows is True
-    assert plan.exchange_capitals is True
+from lib.instance.instance_embed_context_lib import embed_render_plan, trade_records_summary
+
+
+def test_embed_fragment_trade_is_light():
+    plan = embed_render_plan("trade", "fragment")
+    assert plan.exchange_capitals is False
+    assert plan.records_rows is False
+    assert plan.records_summary is False
+    assert plan.orders is True
+    assert plan.key_history is False
+
+
+def test_embed_shell_trade_summary_only():
+    plan = embed_render_plan("trade", "shell")
+    assert plan.exchange_capitals is True
+    assert plan.records_summary is True
+    assert plan.records_rows is False
+
+
+def test_embed_records_page_loads_rows():
+    plan = embed_render_plan("records", "fragment")
+    assert plan.records_rows is True
+
+
+def test_full_page_unchanged():
+    plan = embed_render_plan("trade", None)
+    assert plan.records_rows is True
+    assert plan.exchange_capitals is True