add dispose to files to remove controllers when not used

Frontend/patient_manager/lib/pages/fullScreenFile.dart

@@ -38,6 +38,12 @@ class _FullScreenFileViewerState extends State<FullScreenFileViewer> {
     });
   }
 
+  @override
+  void dispose() {
+    pdfViewerController.dispose();
+    super.dispose();
+  }
+
   @override
   void initState() {
     pdfViewerController.addListener(onPageSelect);

Frontend/patient_manager/lib/pages/home.dart

@@ -71,6 +71,12 @@ class _HomeState extends State<Home> {
     }
   }
 
+  @override
+  void dispose() {
+    // TODO: implement dispose
+    super.dispose();
+  }
+
   @override
   void initState() {
     super.initState();

Frontend/patient_manager/lib/pages/patientAccessReview.dart

@@ -244,6 +244,12 @@ class _PatientAccessRequestState extends State<PatientAccessRequest> {
     // });
   }
 
+  @override
+  void dispose() {
+    filterController.dispose();
+    super.dispose();
+  }
+
   @override
   void initState() {
     selectedDropdown = "All";

Frontend/patient_manager/lib/pages/patientAdd.dart

@@ -309,6 +309,24 @@ class _AddPatientState extends State<AddPatient> {
     }
   }
 
+  @override
+  void dispose() {
+    idController.dispose();
+    fnameController.dispose();
+    lnameController.dispose();
+    cellController.dispose();
+    emailController.dispose();
+    medNoController.dispose();
+    medNameController.dispose();
+    medSchemeController.dispose();
+    addressController.dispose();
+    medAidController.dispose();
+    medMainMemController.dispose();
+    medAidCodeController.dispose();
+    _focusNode.dispose();
+    super.dispose();
+  }
+
   @override
   void initState() {
     medAidController.addListener(isRequired);

Frontend/patient_manager/lib/pages/patientEdit.dart

@@ -536,6 +536,24 @@ class _EditPatientState extends State<EditPatient> {
     }
   }
 
+  @override
+  void dispose() {
+    idController.dispose();
+    fnameController.dispose();
+    lnameController.dispose();
+    cellController.dispose();
+    emailController.dispose();
+    medNoController.dispose();
+    medNameController.dispose();
+    medSchemeController.dispose();
+    addressController.dispose();
+    medAidController.dispose();
+    medMainMemController.dispose();
+    medAidCodeController.dispose();
+    _focusNode.dispose();
+    super.dispose();
+  }
+
   @override
   void initState() {
     getLoginUserEmail();

Frontend/patient_manager/lib/pages/patientManager.dart

@@ -428,6 +428,13 @@ class _PatientManagerState extends State<PatientManager> {
     }
   }
 
+  @override
+  void dispose() {
+    searchController.dispose();
+    queueDateController.dispose();
+    super.dispose();
+  }
+
   @override
   void initState() {
     patientSearchResults = fetchPatients("abc");

Frontend/patient_manager/lib/pages/patientView.dart

@@ -48,6 +48,12 @@ class _PatientViewState extends State<PatientView> {
     return null;
   }
 
+  @override
+  void dispose() {
+    // TODO: implement dispose
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     // loadImage();

Frontend/patient_manager/lib/pages/patientViewPersonal.dart

@@ -57,6 +57,12 @@ class _PatientViewState extends State<PatientViewPersonal> {
   //   }
   // }
 
+  @override
+  void dispose() {
+    // TODO: implement dispose
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     // loadImage();

Frontend/patient_manager/lib/pages/profileBusinessAdd.dart

@@ -197,6 +197,23 @@ class _ProfileBusinessAddState extends State<ProfileBusinessAdd> {
     return regex.hasMatch(text);
   }
 
+  @override
+  void dispose() {
+    nameController.dispose();
+    typeController.dispose();
+    regController.dispose();
+    logonameController.dispose();
+    fnameController.dispose();
+    lnameController.dispose();
+    titleController.dispose();
+    signtureController.dispose();
+    accessController.dispose();
+    contactController.dispose();
+    emailController.dispose();
+    _focusNode.dispose();
+    super.dispose();
+  }
+
   @override
   void initState() {
     setState(() {

Frontend/patient_manager/lib/pages/profileBusinessUpdate.dart

@@ -265,6 +265,23 @@ class _ProfileBusinessUpdateState extends State<ProfileBusinessUpdate> {
     return regex.hasMatch(text);
   }
 
+  @override
+  void dispose() {
+    nameController.dispose();
+    typeController.dispose();
+    regController.dispose();
+    logonameController.dispose();
+    fnameController.dispose();
+    lnameController.dispose();
+    titleController.dispose();
+    signtureController.dispose();
+    accessController.dispose();
+    contactController.dispose();
+    emailController.dispose();
+    _focusNode.dispose();
+    super.dispose();
+  }
+
   @override
   void initState() {
     setState(() {

Frontend/patient_manager/lib/pages/profileUserUpdate.dart

@@ -142,6 +142,15 @@ class _ProfileUserUpdateState extends State<ProfileUserUpdate> {
     }
   }
 
+  @override
+  void dispose() {
+    usernameController.dispose();
+    fnameController.dispose();
+    lnameController.dispose();
+    _focusNode.dispose();
+    super.dispose();
+  }
+
   @override
   void initState() {
     setState(() {

Frontend/patient_manager/lib/pages/register.dart

@@ -225,6 +225,15 @@ class _RegisterState extends State<Register> {
     });
   }
 
+  @override
+  void dispose() {
+    emailController.dispose();
+    passwordController.dispose();
+    officeID.dispose();
+    _focusNode.dispose();
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     return KeyboardListener(

Frontend/patient_manager/lib/pages/signin.dart

@@ -100,6 +100,14 @@ class _SignInState extends State<SignIn> {
     }
   }
 
+  @override
+  void dispose() {
+    emailController.dispose();
+    passwordController.dispose();
+    _focusNode.dispose();
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     return KeyboardListener(