feat(styles): drawing_apply_standard — ISO or ANSI styles, units and layers in one idempotent call

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd

tests/test_tool_registry.py

@@ -519,9 +519,11 @@ async def test_tool_group_sizes_are_unchanged():
     tag is ranked first in `_GROUP_TAG_PRIORITY` so those tools file under
     `pid` rather than under their secondary `query` / `create` tags. `styles`
     appeared (0 -> 9) when track E's SECTION 18 opened with the dimension,
-    text and multileader style tools; the `style` tag sits ahead of `layer`
-    in `_GROUP_TAG_PRIORITY` so they never file under their secondary
-    `query` / `create` / `modify` tags. Every other number here has been
+    text and multileader style tools, then 9 -> 10 when
+    `drawing_apply_standard` (ISO or ANSI styles, units and layers in one
+    call) joined; the `style` tag sits ahead of `layer` and `drawing` in
+    `_GROUP_TAG_PRIORITY` so they never file under their secondary
+    `query` / `create` / `modify` / `drawing` tags. Every other number here has been
     unchanged since the snapshot was taken.
     """
     sizes = {label: len(names) for label, names in (await server._tool_groups()).items()}
@@ -541,11 +543,11 @@ async def test_tool_group_sizes_are_unchanged():
         "pid": 9,
         "premium": 12,
         "solids": 5,
-        "styles": 9,
+        "styles": 10,
         "system": 7,
         "templates": 2,
         "transactions": 3,
         "validation": 1,
         "view": 4,
     }
-    assert sum(sizes.values()) == 175
+    assert sum(sizes.values()) == 176