Update `conftest.py` for `tractor` runtime API changes

Port test fixtures to match `tractor`'s updated
registry and channel APIs.

Deats,
- use `registry_addrs=[reg_addr]` (list) instead of
  `registry_addr=reg_addr` in `maybe_open_pikerd()`.
- `wait_for_actor()` now takes `registry_addr=`
  kwarg instead of `arbiter_sockaddr=`.
- access `portal.chan` (not `.channel`) and unwrap
  remote addr via `raddr.unwrap()`.
- yield `raddr._host`/`raddr._port` instead of
  tuple-indexing.
- drop random port generation; accept `reg_addr`
  fixture from `tractor`'s builtin pytest plugin.

Also,
- add `reg_addr: tuple` param to `open_test_pikerd()`
  fixture (sourced from `tractor._testing.pytest`).
- type-narrow `reg_addr` to `tuple[str, int|str]`.
- drop unused `import random`.

(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code

piker/ui/_axes.py

@@ -20,9 +20,8 @@ Chart axes graphics and behavior.
 """
 from __future__ import annotations
 from functools import lru_cache
-from math import floor
-import platform
 from typing import Callable
+from math import floor
 
 import polars as pl
 import pyqtgraph as pg
@@ -43,7 +42,6 @@ from ._style import DpiAwareFont, hcolor, _font
 from ._interaction import ChartView
 from ._dataviz import Viz
 
-_friggin_macos: bool = platform.system() == 'Darwin'
 _axis_pen = pg.mkPen(hcolor('bracket'))
 
 
@@ -174,7 +172,6 @@ class Axis(pg.AxisItem):
         text_offset = None
         if self.orientation in ('bottom',):
             text_offset = floor(0.25 * font_size)
-
         elif self.orientation in ('left', 'right'):
             text_offset = floor(font_size / 2)
 
@@ -296,22 +293,15 @@ class PriceAxis(Axis):
     ) -> None:
         self._min_tick = size
 
-    if _friggin_macos:
-        def size_to_values(self) -> None:
-            # Call PyQtGraph's internal width update mechanism
-            # This respects autoExpandTextSpace and updates min/max constraints
-            self._updateWidth()
-            # tell Qt our preferred size changed so layout recalculates
-            self.updateGeometry()
-            # force parent plot item to recalculate its layout
-            if self.pi and hasattr(self.pi, 'updateGeometry'):
-                self.pi.updateGeometry()
-
-    else:
-        def size_to_values(self) -> None:
-            # XXX, old code!
-            self.setWidth(self.typical_br.width())
-
+    def size_to_values(self) -> None:
+        # Call PyQtGraph's internal width update mechanism
+        # This respects autoExpandTextSpace and updates min/max constraints
+        self._updateWidth()
+        # tell Qt our preferred size changed so layout recalculates
+        self.updateGeometry()
+        # force parent plot item to recalculate its layout
+        if self.pi and hasattr(self.pi, 'updateGeometry'):
+            self.pi.updateGeometry()
 
     # XXX: drop for now since it just eats up h space
 
@@ -354,21 +344,15 @@ class DynamicDateAxis(Axis):
         1: '%H:%M:%S',
     }
 
-    if _friggin_macos:
-        def size_to_values(self) -> None:
-            # Call PyQtGraph's internal height update mechanism
-            # This respects autoExpandTextSpace and updates min/max constraints
-            self._updateHeight()
-            # tell Qt our preferred size changed so layout recalculates
-            self.updateGeometry()
-            # force parent plot item to recalculate its layout
-            if self.pi and hasattr(self.pi, 'updateGeometry'):
-                self.pi.updateGeometry()
-
-    else:
-        def size_to_values(self) -> None:
-            # XXX, old code!
-            self.setHeight(self.typical_br.height() + 1)
+    def size_to_values(self) -> None:
+        # Call PyQtGraph's internal height update mechanism
+        # This respects autoExpandTextSpace and updates min/max constraints
+        self._updateHeight()
+        # tell Qt our preferred size changed so layout recalculates
+        self.updateGeometry()
+        # force parent plot item to recalculate its layout
+        if self.pi and hasattr(self.pi, 'updateGeometry'):
+            self.pi.updateGeometry()
 
     def _indexes_to_timestrs(
         self,