feat(thermal): certify shell geometry and local heat operators

include/fesa/analysis/thermal_time_grid.h

@@ -13,21 +13,25 @@ struct ThermalTimeFrame {
   double delta;
 };
 
-/// @brief Stores an O(1) fixed-increment grid with exact input-cell endpoint tests.
+/// @brief Stores an O(1) fixed-increment grid with exact input-cell endpoint
+/// tests.
 class ThermalTimeGrid final {
  public:
-  /// @brief Checks finite positive controls and the uint32 INC bound before use.
+  /// @brief Checks finite positive controls and the uint32 INC bound before
+  /// use.
   static Result<ThermalTimeGrid> Create(double period, double increment,
-                                       std::uint32_t maximum = 100U);
+                                        std::uint32_t maximum = 100U);
   /// @brief Returns the number of completed increments, excluding initial time.
   std::uint32_t Count() const noexcept;
-  /// @brief Returns fl(index * nominal increment), or the exact final input time.
+  /// @brief Returns fl(index * nominal increment), or the exact final input
+  /// time.
   /// @pre index is in [0, Count()].
   double Time(std::uint32_t index) const noexcept;
   /// @brief Returns the actual coefficient, never a difference of stored times.
   /// @pre index is in [1, Count()].
   double Delta(std::uint32_t index) const noexcept;
-  /// @brief Checks index, finite values and strict increase for one frame in O(1).
+  /// @brief Checks index, finite values and strict increase for one frame in
+  /// O(1).
   Result<ThermalTimeFrame> Frame(std::uint32_t index) const;
 
  private: