Добавление нового функционала

src/diagram.css

@@ -11,7 +11,9 @@
 
 .diagram-toolbar {
   display: flex;
+  flex-wrap: wrap;
   gap: 8px;
+  max-width: 280px;
 }
 
 .diagram-toolbar button {
@@ -28,6 +30,26 @@
   background: color-mix(in srgb, canvastext 8%, canvas);
 }
 
+.diagram-flow--view-mode .react-flow__handle {
+  display: none;
+}
+
+/*
+ * React Flow's built-in disabled styling only dims <svg> children (for the
+ * zoom/fit/lock icon buttons) — our undo/redo controls use plain text glyphs,
+ * so they need their own dimming or they'd look clickable while inert.
+ */
+.react-flow__controls-button:disabled {
+  opacity: 0.4;
+}
+
+.diagram-alignment-guide {
+  position: absolute;
+  background: #ff0072;
+  pointer-events: none;
+  z-index: 1000;
+}
+
 .diagram-mode-toggle {
   display: flex;
   border: 1px solid #999;
@@ -80,14 +102,24 @@
 
 .diagram-node {
   position: relative;
-  min-width: 120px;
-  padding: 10px 16px;
+  width: 100%;
+  height: 100%;
+  padding: 6px 10px;
   border: 1px solid #555;
   border-radius: 6px;
   background: canvas;
   color: canvastext;
   font-size: 12px;
   text-align: center;
+  box-sizing: border-box;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.diagram-node__label {
+  white-space: pre-wrap;
+  overflow-wrap: break-word;
 }
 
 .diagram-node__badge {
@@ -104,35 +136,74 @@
   display: flex;
   align-items: center;
   justify-content: center;
+  z-index: 1;
 }
 
-.diagram-node--gateway {
-  width: 64px;
-  height: 64px;
-  min-width: 0;
+.diagram-node__caption {
+  position: absolute;
+  top: 100%;
+  left: 50%;
+  transform: translateX(-50%);
+  margin-top: 4px;
+  max-width: 120px;
+  font-size: 11px;
+  text-align: center;
+  color: canvastext;
+  white-space: pre-wrap;
+}
+
+.diagram-node--circle {
   padding: 0;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  border-radius: 4px;
-  transform: rotate(45deg);
+  border-radius: 50%;
 }
 
-.diagram-node--gateway span {
+.diagram-node--startEvent {
+  border-width: 1px;
+}
+
+.diagram-node--endEvent {
+  border-width: 3px;
+}
+
+.diagram-node--intermediateEvent {
+  border-width: 1px;
+}
+
+.diagram-node--intermediateEvent::after {
+  content: '';
+  position: absolute;
+  inset: 3px;
+  border: 1px solid #555;
+  border-radius: 50%;
+}
+
+.diagram-node--gateway-outer {
+  position: relative;
+  width: 100%;
+  height: 100%;
+}
+
+/*
+ * Inset to 1/sqrt(2) of the outer box and rotated 45deg: the diamond's tips
+ * exactly reach the outer box's edges without the corners clipping outside it.
+ */
+.diagram-node--diamond {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  width: 70.71%;
+  height: 70.71%;
+  padding: 0;
+  border-radius: 4px;
+  transform: translate(-50%, -50%) rotate(45deg);
+}
+
+.diagram-node__icon {
   display: inline-block;
   transform: rotate(-45deg);
-  font-size: 11px;
-}
-
-.diagram-node--event {
-  width: 64px;
-  height: 64px;
-  min-width: 0;
-  padding: 0;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  border-radius: 50%;
+  font-size: 18px;
+  font-weight: 700;
+  line-height: 1;
 }
 
 .diagram-aside {
@@ -177,6 +248,25 @@
   justify-content: space-between;
 }
 
+.node-inspector__toolbar {
+  display: flex;
+  gap: 8px;
+}
+
+.node-inspector__toolbar button {
+  font: inherit;
+  padding: 6px 10px;
+  border: 1px solid #999;
+  border-radius: 4px;
+  background: canvas;
+  color: canvastext;
+  cursor: pointer;
+}
+
+.node-inspector__toolbar button:hover {
+  background: color-mix(in srgb, canvastext 8%, canvas);
+}
+
 .node-inspector__type {
   font-weight: 600;
 }
@@ -204,6 +294,19 @@
   color: canvastext;
 }
 
+.node-inspector__field--color {
+  flex-direction: row;
+  align-items: center;
+  gap: 8px;
+}
+
+.node-inspector__field--color input[type='color'] {
+  width: 36px;
+  height: 28px;
+  padding: 2px;
+  cursor: pointer;
+}
+
 .node-inspector__action {
   font: inherit;
   padding: 8px 10px;
@@ -227,6 +330,7 @@
 .node-inspector__label {
   margin: 0;
   font-size: 15px;
+  white-space: pre-wrap;
 }
 
 .node-inspector__description {