api: Change level endpoint

src/main/java/com/maradona/backend/controllers/SkillsController.java

@@ -142,4 +142,23 @@ public class SkillsController {
     }
     return "redirect:/skills";
   }
+
+  // Update skill level
+  @PostMapping("/update-level")
+  public String updateLevel(@RequestParam Long skillId, @RequestParam Integer level) {
+    var employee = employeeService.getEmployeeById(user).orElseThrow(() -> new RuntimeException("Employee not found"));
+    var secondarySkill = secondarySkillService.getSecondarySkillById(skillId)
+        .orElseThrow(() -> new RuntimeException("Secondary Skill not found"));
+
+    for (EmployeeSecondarySkill ess : employee.getSecondarySkills()) {
+      if (ess.getSecondarySkill().getSsid().equals(skillId)) {
+        ess.setLevel(level);
+        break;
+      }
+    }
+
+    employeeService.saveEmployee(employee);
+
+    return "redirect:/skills";
+  }
 }