Ruff linter fixed

Author: DOKOS-TAYOS

src/frontend/plot_embed.py

@@ -155,7 +155,9 @@ def _on_stop() -> None:
         scale.pack(side=tk.LEFT, fill=tk.X, expand=True, padx=4)
 
         ttk.Label(ctrl_frame, text="Duration (s):").pack(side=tk.LEFT, padx=(8, 2))
-        ttk.Entry(ctrl_frame, textvariable=duration_var, width=5, font=get_font()).pack(side=tk.LEFT, padx=2)
+        ttk.Entry(
+            ctrl_frame, textvariable=duration_var, width=5, font=get_font()
+        ).pack(side=tk.LEFT, padx=2)
 
         ttk.Button(
             ctrl_frame,

src/frontend/ui_dialogs/parameters_dialog.py

@@ -311,7 +311,7 @@ def _build_ui(self, default_y0: list[float], default_domain: list[float]) -> Non
                 n_ic = self.order * self.vector_components
             else:
                 n_ic = self.order
-            ic_label_width = max(len(l) for l in ic_labels) + 1
+            ic_label_width = max(len(label) for label in ic_labels) + 1
             x0_label_width = (
                 max(
                     len(f"x{_subscripts[i] if i < len(_subscripts) else str(i)} =")

src/frontend/ui_dialogs/result_dialog.py

@@ -356,6 +356,7 @@ def _apply_transform_multi(
         if nothing could be computed.
         """
         from scipy.interpolate import interp1d
+
         from transforms import apply_transform
 
         x_min_t, x_max_t = float(x[0]), float(x[-1])
@@ -688,7 +689,7 @@ def _build_vector_ode_tabs(self) -> None:
     def _update_vec_solution_plot(self) -> None:
         """Regenerate vector ODE solution plot."""
         from plotting import create_solution_plot
-        from transforms import TransformKind, apply_transform
+        from transforms import TransformKind
 
         r = self._result
         selected = list(self._vec_sol_listbox.curselection())
@@ -875,7 +876,9 @@ def _build_pde_tabs(self) -> None:
 
         xlabel, ylabel = self._pde_axis_labels()
 
-        ttk.Label(trans_ctrl, text="Slice along:", style="Small.TLabel").pack(side=tk.LEFT, padx=(0, 4))
+        ttk.Label(
+            trans_ctrl, text="Slice along:", style="Small.TLabel"
+        ).pack(side=tk.LEFT, padx=(0, 4))
         self._pde_slice_var = tk.StringVar(value=xlabel)
         ttk.Combobox(
             trans_ctrl, textvariable=self._pde_slice_var,
@@ -884,10 +887,15 @@ def _build_pde_tabs(self) -> None:
         ).pack(side=tk.LEFT, padx=(0, 2))
 
         r = self._result
-        x_mid = float((r.x[0] + r.x[-1]) / 2) if len(r.x) > 0 else 0.5
-        y_mid = float((r.y_grid[0] + r.y_grid[-1]) / 2) if r.y_grid is not None and len(r.y_grid) > 0 else 0.5
+        y_mid = (
+            float((r.y_grid[0] + r.y_grid[-1]) / 2)
+            if r.y_grid is not None and len(r.y_grid) > 0
+            else 0.5
+        )
 
-        ttk.Label(trans_ctrl, text="at fixed value:", style="Small.TLabel").pack(side=tk.LEFT, padx=(0, 4))
+        ttk.Label(
+            trans_ctrl, text="at fixed value:", style="Small.TLabel"
+        ).pack(side=tk.LEFT, padx=(0, 4))
         self._pde_slice_val_var = tk.StringVar(value=str(round(y_mid, 4)))
         ttk.Entry(
             trans_ctrl, textvariable=self._pde_slice_val_var, width=4,