Add TUI frozen indicator; fix spell check scanning build_test/

tui.py: show '[frozen]' tag in 2D header and 1D title when color range is locked
.typos.toml: exclude build/ and build_test/ to prevent false positives from
             Doxygen-generated HTML hash strings

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

Author: sbryngelson

.typos.toml

@@ -31,4 +31,4 @@ tru = "tru"           # typo for "true" in "when_tru" - tests dependency keys
 PNGs = "PNGs"
 
 [files]
-extend-exclude = ["docs/documentation/references*", "docs/references.bib", "tests/", "toolchain/cce_simulation_workgroup_256.sh", "build-docs/"]
+extend-exclude = ["docs/documentation/references*", "docs/references.bib", "tests/", "toolchain/cce_simulation_workgroup_256.sh", "build-docs/", "build/", "build_test/"]

toolchain/mfc/viz/tui.py

@@ -96,6 +96,8 @@ def render(self):  # pylint: disable=too-many-branches,too-many-locals,too-many-
                     plot_y = data
                     ylabel = self._varname
                     title_tag = ""
+                if self._vmin is not None or self._vmax is not None:
+                    title_tag += "  [frozen]"
                 finite = plot_y[np.isfinite(plot_y)]
                 self._last_vmin = float(finite.min()) if finite.size else 0.0
                 self._last_vmax = float(finite.max()) if finite.size else 1.0
@@ -182,9 +184,10 @@ def render(self):  # pylint: disable=too-many-branches,too-many-locals,too-many-
 
         y_cc = self._y_cc if self._y_cc is not None else np.array([0.0, 1.0])
         log_tag = "  [log]" if log_active else ("  [log n/a]" if self._log_scale else "")
+        frozen_tag = "  [frozen]" if self._vmin is not None else ""
         header = RichText(
             f" {self._varname}  (step {self._step})"
-            f"   [{vmin:.3g}, {vmax:.3g}]{log_tag}",
+            f"   [{vmin:.3g}, {vmax:.3g}]{log_tag}{frozen_tag}",
             style="bold"
         )
         footer = RichText(