Bootstrap 5 & remove jQuery (#661)

* build: move frontend assets to Bootstrap 5.3 and Tom Select

* feat: migrate templates and scripts to Bootstrap 5, dropping jQuery

Templates
- Rename Bootstrap 4 classes and data attributes (data-bs-*, ms-/me-/ps-/pe-,
  text-start/end, form-group -> mb-3, input-group wrappers removed, badges,
  custom controls -> form-check/form-select, media -> d-flex, btn-close, ...)
- Dark mode now uses Bootstrap 5.3 colour modes (data-bs-theme on <html>),
  set from <head> to avoid a flash of the light theme
- Remove the Bootstrap 4 /bootstrap/ demo page
- Contextual table classes (table-success etc.) still work as plain
  backgrounds for the rigboard key

JavaScript
- Remove jQuery: src.js/interaction.js and every inline template script are
  rewritten in plain JS on top of small helpers (helpers.js, bundled with
  Bootstrap into jpop.js so inline scripts can use them)
- Replace bootstrap-select/ajax-bootstrap-select with Tom Select. The remote
  search now sends the `q` parameter and reads `text`, which is what the
  API actually uses (the old picker sent `term` and read `label`)
- HTML fragments are fetched with an X-Requested-With header so views keep
  rendering their modal variants, and fetched scripts are re-executed
- Remove the Bootstrap 4 plugin script includes

* fix: stop rigboard header buttons stretching to full width under Bootstrap 5

* fix: restore dark-mode brand colours and contextual table colours under Bootstrap 5

* fix: brighten dark-mode links and make coloured card outlines visible

* fix: calendar layout and grid borders, navbar search button width, guard missing modal links

* fix: readable text in dark-mode Tom Select inputs and placeholders, restore form-control column widths

* build: split the Dockerfile into cached stages with prod and dev targets

* deploy: make compose.yml development-only with live reload, and document it

* fix: keep badge text colour for links inside badges

* fix: restore table-bordered grid lines in dark mode

* fix: include Bootstrap's progress styles and keep progress labels readable

pipeline/source_assets/js/src.js

@@ -4,19 +4,30 @@ Date.prototype.getISOString = function () {
         var dd = this.getDate().toString();
         return yyyy + '-' + (mm[1] ? mm : "0" + mm[0]) + '-' + (dd[1] ? dd : "0" + dd[0]); // padding
 };
-jQuery(document).ready(function () {
-    jQuery(document).on('click', '.modal-href', function (e) {
-        $link = jQuery(this);
+
+ready(function () {
+    // Links that load their target into the shared modal
+    on(document, 'click', '.modal-href', function (e) {
         // Anti modal inception
-        if ($link.parents('#modal').length == 0) {
+        if (!this.closest('#modal')) {
             e.preventDefault();
-            modaltarget = $link.data('target');
+            modaltarget = this.dataset.selectTarget;
             modalobject = "";
-            jQuery('#modal').load($link.attr('href'), function (e) {
-                jQuery('#modal').modal();
-            });
+            loadModal(this.getAttribute('href'));
         }
     });
+
+    // Forms inside the modal are submitted over AJAX and the response replaces the modal contents
+    on(document, 'submit', '#modal form', function (e) {
+        e.preventDefault();
+        var form = this;
+        ajaxFetch(form.getAttribute('action') || window.location.href, {
+            method: 'POST',
+            body: new FormData(form)
+        }).then(function (response) { return response.text(); })
+          .then(function (html) { setHtml(document.getElementById('modal'), html); });
+    });
+
     var easter_egg = new Konami(function () {
         var s = document.createElement('script');
         s.type = 'text/javascript';
@@ -24,7 +35,12 @@ jQuery(document).ready(function () {
         s.src = '/static/js/asteroids.min.js';
     });
     easter_egg.load();
+
+    initTooltips();
+    initPopovers();
+    document.querySelectorAll('.navbar-collapse').forEach(function (el) { el.classList.add('collapse'); });
 });
+
 //CTRL-Enter form submission
 document.body.addEventListener('keydown', function(e) {
     if(e.keyCode == 13 && (e.metaKey || e.ctrlKey)) {
@@ -34,4 +50,3 @@ document.body.addEventListener('keydown', function(e) {
         }
     }
 });
-$('.navbar-collapse').addClass('collapse');