chore(tox): Rework default environments, extras

tox.ini

@@ -9,13 +9,10 @@ requires =
 envlist =
   # No preinstallations
   py3{9,10,11,12,13,13t}-none
-  # Minimum Python
-  py39-{min,full}
-  # x86 support range
-  py3{9,10,11}-{full,pre}-{x86,x64}
-  py3{9,10,11}-pre-{x86,x64}
-  # x64-only range
-  py3{12,13,13t}-{full,pre}-x64
+  # Minimum Python with minimum deps
+  py39-min
+  # Run full and pre dependencies against all archs
+  py3{9,10,11,12,13,13t}-{full,pre}-{x86,x64,arm64}
   install
   doctest
   style
@@ -34,7 +31,7 @@ python =
 
 [gh-actions:env]
 DEPENDS =
-  none: none, install
+  none: none
   pre: pre
   full: full, install
   min: min
@@ -74,19 +71,25 @@ extras =
   !none: dicomfs
   !none: indexed_gzip
 
+  # Minimum dependencies
+  min: minc2
+  min: spm
+  min: viewers
+  min: zstd
+
   # Matplotlib has wheels for everything except win32 (x86)
-  {min,full,pre}-{x,arm}64: viewers
+  {full,pre}-{x,arm}64: viewers
 
   # Nightly, but not released cp313t wheels for: scipy
-  # When released, remove the py3* line and add min/full to the pre line
-  py3{9,10,11,12,13}-{min,full}-{x,arm}64: spm
+  # When released, remove the py3* line and add full to the pre line
+  py3{9,10,11,12,13}-full-{x,arm}64: spm
   pre-{x,arm}64: spm
 
   # No cp313t wheels for: h5py, pyzstd
-  py3{9,10,11,12,13}-{min,full,pre}-{x,arm}64: minc2
-  py3{9,10,11,12,13}-{min,full,pre}-{x,arm}64: zstd
+  py3{9,10,11,12,13}-{full,pre}-{x,arm}64: minc2
+  py3{9,10,11,12,13}-{full,pre}-{x,arm}64: zstd
 
-  # No win32 wheels for scipy after py39
+  # win32 (x86) wheels still exist for scipy+py39
   py39-full-x86: spm
 
 deps =