chore: sync local working copy as of 2026-08-15

The Gitea repo was initialised from an earlier snapshot, so main and the
machine this runs on had drifted apart in 153 files before any UI work
started. This commit brings the branch up to the local tree as it stood
on 2026-08-15 21:31 (from cowork_local.7z), so the redesign that follows
shows up as its own reviewable diff instead of being mixed in with the
pre-existing divergence.

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

ui/spline_chart.py

@@ -13,7 +13,7 @@ from PySide6.QtCore import QPointF, Qt
 from PySide6.QtGui import QBrush, QColor, QLinearGradient, QPainter, QPainterPath, QPen
 from PySide6.QtWidgets import QWidget
 
-from ..theme import ACCENT
+from ..theme import current_palette
 
 
 def _endpoint_label_rect(point_x: float, point_y: float, text_width: float,
@@ -75,17 +75,13 @@ class SplineChart(QWidget):
         self._refs = list(refs or [])
         self.update()
 
-    def _dark(self) -> bool:
-        from .chat_view import _app_theme
-        return _app_theme() == "dark"
-
     def paintEvent(self, _e):  # noqa: N802
         p = QPainter(self)
         p.setRenderHint(QPainter.Antialiasing)
-        dark = self._dark()
-        grid = QColor("#1A2D4A" if dark else "#C7DEEE")
-        text = QColor("#8FB2D4" if dark else "#5C7A94")
-        accent = QColor(ACCENT)
+        tok = current_palette()
+        grid = QColor(tok.chart_grid)
+        text = QColor(tok.chart_label)
+        accent = QColor(tok.accent)
         w, h = self.width(), self.height()
 
         pts = self._points