fix(dftu): resolve conflict between yukawa_potential and uramping

1. Add check_value callback to yukawa_potential to error out when
   both yukawa_potential and uramping are enabled simultaneously
2. Skip uramping_update() when Yukawa is enabled (U calculated directly
   from charge density every iteration)
3. Return true from u_converged() when Yukawa is enabled (U is
   self-consistently calculated, no ramping convergence needed)

Author: dyzheng

source/source_io/module_parameter/read_input_item_exx_dftu.cpp

@@ -766,6 +766,16 @@ void ReadInput::item_dftu()
         item.default_value = "False";
         item.unit = "";
         item.availability = "";
+        item.check_value = [](const Input_Item& item, const Parameter& para) {
+            if (!item.is_read()) { return; }
+            if (para.inp.yukawa_potential && para.globalv.uramping > 0.01)
+            {
+                ModuleBase::WARNING_QUIT("ReadInput",
+                                         "yukawa_potential and uramping cannot be used together. "
+                                         "yukawa_potential calculates U directly from charge density every iteration, "
+                                         "while uramping gradually increases U from 0. Please set only one of them.");
+            }
+        };
         read_sync_bool(input.yukawa_potential);
         this->add_item(item);
     }

source/source_lcao/module_dftu/dftu.cpp

@@ -393,6 +393,10 @@ void Plus_U::cal_energy_correction(const UnitCell& ucell,
 
 void Plus_U::uramping_update()
 {
+    // Yukawa calculates U directly every iteration, no need for ramping
+    if (Yukawa) {
+        return;
+    }
     // if uramping < 0.1, use the original U
     if (this->uramping < 0.01) {
         return;
@@ -413,6 +417,10 @@ void Plus_U::uramping_update()
 
 bool Plus_U::u_converged()
 {
+    // Yukawa calculates U directly every iteration, always considered converged
+    if (Yukawa) {
+        return true;
+    }
     for (int i = 0; i < this->U0.size(); i++)
     {
         if (this->U[i] != this->U0[i])