Fix Python 3.10+ compatibility and packaging issues

- Replace deprecated matplotlib.cm.get_cmap() with matplotlib.colormaps[]
  (deprecated since matplotlib 3.7, removal pending)
- Drop imageio.v2 shim in renderer.py; use top-level imageio instead
  (v2 is a backwards-compat shim; top-level API is stable)
- Add requires-python = ">=3.10" to pyproject.toml
- Bump dash>=1.12.0 to dash>=2.0 (callback_context semantics changed in 2.0)
- Remove duplicate typos entry in pyproject.toml

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: sbryngelson

toolchain/mfc/viz/renderer.py

@@ -13,7 +13,7 @@
 
 import numpy as np
 
-import imageio.v2 as imageio
+import imageio
 
 import matplotlib
 matplotlib.use('Agg')

toolchain/mfc/viz/tui.py

@@ -110,7 +110,7 @@ def render(self):  # pylint: disable=too-many-branches,too-many-locals,too-many-
             return super().render()
 
         # 2D: pure-Rich heatmap with vertical colorbar.
-        import matplotlib.cm as mcm          # pylint: disable=import-outside-toplevel
+        import matplotlib                     # pylint: disable=import-outside-toplevel
         import matplotlib.colors as mcolors  # pylint: disable=import-outside-toplevel
 
         # Content area = widget size minus 1-char border on each side.
@@ -132,7 +132,7 @@ def render(self):  # pylint: disable=too-many-branches,too-many-locals,too-many-
             vmax = vmin + 1e-10
         self._last_vmin = vmin
         self._last_vmax = vmax
-        cmap = mcm.get_cmap(self._cmap_name)
+        cmap = matplotlib.colormaps[self._cmap_name]
         if self._log_scale and vmin > 0:
             norm = mcolors.LogNorm(vmin=vmin, vmax=vmax)
         else:

toolchain/pyproject.toml

@@ -5,11 +5,11 @@ build-backend = "hatchling.build"
 [project]
 name = "mfc"
 dynamic = ["version"]
+requires-python = ">=3.10"
 dependencies = [
     # General
     "rich",
     "wheel",
-    "typos",
     "PyYAML",
     "argparse",
     "dataclasses",
@@ -53,7 +53,7 @@ dependencies = [
     # Frontier Profiling
     "astunparse==1.6.2",
     "colorlover",
-    "dash>=1.12.0",
+    "dash>=2.0",
     "pymongo",
     "tabulate",
     "tqdm",