Replace channel toggles with per-channel MultiSelect mode selectors

Each channel family (meson, vector, baryon, glueball, tensor) now has its
own MultiSelect widget listing all operator modes plus their propagator
(frozen-source) equivalents. Users can select multiple modes simultaneously
to compare across scales for mass fits. The pipeline runs once for data
preparation, then computes additional modes efficiently by calling operator
functions directly on the shared PreparedChannelData.

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

Author: Guillemdb

src/fragile/physics/app/_fractal_set.py

@@ -35,6 +35,12 @@
     "baryon_nucleon": "#54a24b",
     "glueball_plaquette": "#b279a2",
     "tensor_traceless": "#ff9da6",
+    "meson_scalar_propagator": "#7b9ec9",
+    "meson_pseudoscalar_propagator": "#a3d4d0",
+    "vector_full_propagator": "#f9a84f",
+    "axial_full_propagator": "#e8817f",
+    "baryon_nucleon_propagator": "#7ec47b",
+    "glueball_plaquette_propagator": "#c9a0bf",
 }
 
 _DEFAULT_COLOR = "#1f77b4"

src/fragile/physics/app/correlator_plots.py

@@ -14,6 +14,7 @@
 from fragile.physics.app.diagnostics import build_coupling_diagnostics_tab
 from fragile.physics.app.gravity import build_holographic_principle_tab
 from fragile.physics.app.simulation import SimulationTab
+from fragile.physics.app.mass_extraction_tab import build_mass_extraction_tab
 from fragile.physics.app.strong_correlators import build_strong_correlator_tab
 from fragile.physics.fractal_gas.history import RunHistory
 
@@ -87,6 +88,7 @@ def _build_ui():
             "_multiscale_geodesic_distribution": None,
             "coupling_diagnostics_output": None,
             "strong_correlator_output": None,
+            "mass_extraction_output": None,
         }
 
         algorithm_section = build_algorithm_diagnostics_tab(state)
@@ -106,6 +108,21 @@ def _build_ui():
             run_tab_computation=_run_tab_computation,
         )
 
+        mass_section = build_mass_extraction_tab(
+            state=state,
+            run_tab_computation=_run_tab_computation,
+        )
+
+        # Wire strong correlator completion to enable mass extraction button.
+        _orig_strong_on_run = strong_section.on_run
+
+        def _on_strong_run(event):
+            _orig_strong_on_run(event)
+            if state["strong_correlator_output"] is not None:
+                mass_section.on_correlators_ready()
+
+        strong_section.run_button.on_click(_on_strong_run)
+
         # Wire SimulationTab history changes to all analysis sections.
         def _on_history_changed(
             history: RunHistory,
@@ -122,6 +139,7 @@ def _on_history_changed(
             holographic_section.on_history_changed(defer)
             coupling_section.on_history_changed(defer)
             strong_section.on_history_changed(defer)
+            mass_section.on_history_changed(defer)
 
         sim_tab.on_history_changed(_on_history_changed)
         holographic_section.fractal_set_run_button.on_click(holographic_section.on_run_fractal_set)
@@ -165,6 +183,7 @@ def _on_history_changed(
                     ("Holographic Principle", holographic_section.fractal_set_tab),
                     ("Coupling Diagnostics", coupling_section.coupling_diagnostics_tab),
                     ("Strong Correlators", strong_section.tab),
+                    ("Mass Extraction", mass_section.tab),
                 )
             ]