fixes #2345 create piwigo standard pages

create new theme standard pages with tpl, css, js and images
update backend to handle pages
add config use_standard_pages
on update set config to false, on install set config to true
add standard pages to no be ingored in git

themes/standard_pages/js/identification_register.js

@@ -0,0 +1,115 @@
+let modeCookie = getCookie("mode"); 
+if("" != modeCookie)
+{
+  toggle_mode(modeCookie);
+}
+
+jQuery( document ).ready(function() {
+  jQuery("#selected-language").textContent = selected_language;
+
+  //Override empty input message
+    jQuery("form").on("submit", function (e) {
+      let isValid = true;
+  
+      jQuery(".column-flex").each(function () {
+        let input = jQuery(this).find("input");
+        let errorMessage = jQuery(this).find(".error-message");
+        if (!input.val().trim()) {
+          
+          e.preventDefault(); 
+          input[0].setCustomValidity(""); // Override browser tooltip (empty space hides it)
+          errorMessage.show(); 
+          isValid = false;
+        } else {
+          input[0].setCustomValidity("");
+          errorMessage.hide();
+        }
+      });
+  
+      return isValid;
+    });
+  
+    // Hide error message and reset validation on input
+    jQuery(".column-flex input").on("input", function () {
+      let errorMessage = jQuery(this).closest(".column-flex").find(".error-message");
+      jQuery(this)[0].setCustomValidity(""); // Reset browser tooltip
+      errorMessage.hide();
+    });
+  
+
+  // Hide error message when user starts typing
+  jQuery(".column-flex input").on("input", function () {
+    jQuery(this).closest(".column-flex").find(".error-message").hide();
+  });
+
+});
+
+function toggle_mode(mode) {
+  setCookie("mode",mode,30);
+  if ("dark" == mode)
+  {
+    //Dark mode
+    jQuery( "#toggle_mode_light" ).hide(); 
+    jQuery( "#toggle_mode_dark" ).show(); 
+    jQuery( "#mode" ).addClass("dark");
+    jQuery( "#mode" ).removeClass("light"); 
+    jQuery( "#piwigo-logo" ).attr("src", url_logo_dark);
+  }
+  else
+  {
+    //Light mode
+    jQuery( "#toggle_mode_dark" ).hide();
+    jQuery( "#toggle_mode_light" ).show();
+    jQuery( "#mode" ).addClass("light");
+    jQuery( "#mode" ).removeClass("dark"); 
+    jQuery( "#piwigo-logo" ).attr("src", url_logo_light);
+  }
+}
+
+function setCookie(cname, cvalue, exdays) {
+  const d = new Date();
+  d.setTime(d.getTime() + (exdays*24*60*60*1000));
+  let expires = "expires="+ d.toUTCString();
+  document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
+  if (cname == "lang")
+  {
+    location.reload();
+  }
+}
+
+function getCookie(cname) {
+  let name = cname + "=";
+  let decodedCookie = decodeURIComponent(document.cookie);
+  let ca = decodedCookie.split(';');
+  for(let i = 0; i <ca.length; i++) {
+    let c = ca[i];
+    while (c.charAt(0) == ' ') {
+      c = c.substring(1);
+    }
+    if (c.indexOf(name) == 0) {
+      return c.substring(name.length, c.length);
+    }
+  }
+  return "";
+}
+
+jQuery(".togglePassword").click(function(e){
+  var toggle = jQuery(e.target);
+  var input = (jQuery(toggle).siblings('input'))[0];
+  if (input.type === "password") {
+    input.type = "text";
+    jQuery(toggle).css("color", "#ff7700");
+  } else {
+    input.type = "password";
+    jQuery(toggle).css("color","#898989");
+  }
+});
+
+jQuery("#other-languages a").click(function(e){
+  let clickedUrl = new URL(jQuery(e.target).attr('href'));
+  let selectedLang = clickedUrl.searchParams.get("lang");
+
+  if (selectedLang) {
+    setCookie('lang',selectedLang,1);
+  }
+});