feat(ui): close the last gaps against the audit design (31/31)

check_design_parity.py reads its checklist from the audit page's own
proposals; it now reports every one of the 31 as implemented, with no
deliberate divergences left.

  * Schedule: the Kanban/Calendar drop-list became a pair of tabs, and the
    Running lane is outlined while it holds anything — dropping a card there
    starts the task for real, so it should not look like the other six.
  * Cowork: agent / routing / usage / folder moved out of the typing box into
    their own status strip beneath it, styled as status rather than a second
    toolbar. All of them stay interactive; the design's read-only strip would
    have cost features.
  * Folder: the path is written as the screen's title instead of sitting in a
    read-only text box that looked editable and cost a row.
  * GraphRAG: the second toolbar row is gone (Export joined the first), and
    the one button that relabelled itself became Đồ thị | Tin nhắn tabs, so
    the view you are NOT in is named too.
  * Settings gained the theme picker, so language / provider / theme are all
    reachable there as well as on the rail's account row.
  * Task editor: the five group boxes are grouped into three step tabs
    (Nội dung → Lịch chạy → Liên kết). All 22 fields verified present after
    the move; only the old section index is gone, replaced by the tabs.
  * The assistant dot now clears a screen's own bottom bar (Cowork's
    composer), measured from the composer's top edge in window coordinates.

Also adds .gitattributes: without it a Windows checkout records CRLF and
every file reads as fully rewritten to a Linux CI runner.

Verification: 7 check_*.py suites green, no screen clipped at 1920/1366/1280,
and no dialog scrolls sideways at 9/11/14pt.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

tools/check_no_hscroll.py

@@ -24,11 +24,30 @@ WIDTHS = (1100, 964, 820, 700)
 POINTS = (9, 11, 14)          # ~100%, ~125%, ~150% display scaling
 
 
-def hscroll(dlg):
-    """(scroll-area overflow, index overflow) — each True means a bar appears."""
+def hscroll(dlg, app):
+    """(scroll-area overflow, index overflow) — each True means content is
+    wider than the space it is given.
+
+    A dialog built from step tabs has one scroll area per page, and a page that
+    is not current has stale geometry — so each tab is brought to the front
+    before its page is measured.
+    """
     from PySide6.QtWidgets import QListWidget, QScrollArea
-    sa = dlg.findChildren(QScrollArea)[0]
-    over_area = sa.widget().sizeHint().width() > sa.viewport().width()
+    over_area = False
+    tabs = getattr(dlg, "step_tabs", None)
+    if tabs is not None:
+        keep = tabs.currentIndex()
+        for i in range(tabs.count()):
+            tabs.setCurrentIndex(i)
+            for _ in range(3):
+                app.processEvents()
+            sa = tabs.widget(i)
+            if sa.widget().sizeHint().width() > sa.viewport().width():
+                over_area = True
+        tabs.setCurrentIndex(keep)
+    else:
+        sa = dlg.findChildren(QScrollArea)[0]
+        over_area = sa.widget().sizeHint().width() > sa.viewport().width()
     idx = dlg.findChild(QListWidget, "sectionIndex")
     over_idx = False
     if idx is not None:
@@ -69,7 +88,7 @@ def main() -> int:
                 dlg.resize(w, 900)
                 for _ in range(4):
                     app.processEvents()
-                over_area, over_idx = hscroll(dlg)
+                over_area, over_idx = hscroll(dlg, app)
                 row.append(f"{w}:{'A' if over_area else '.'}{'I' if over_idx else '.'}")
                 if over_area:
                     fails.append(f"{name} @ {pt}pt {w}px — vung cuon tran ngang")