fix(wysiwyg): Implement programmatic rendering to eliminate focus loss during typing

- Convert parent component to use static rendering with programmatic DOM manipulation
- Remove all reactive state that could trigger re-renders during editing
- Delay content sync to avoid interference with typing (2s auto-save)
- Update all block operations to use manual DOM updates instead of Lit re-renders
- Fix specific issue where typing + arrow keys caused focus loss
- Add comprehensive focus management documentation

ts_web/elements/wysiwyg/dees-wysiwyg-block.ts

@@ -41,6 +41,9 @@ export class DeesWysiwygBlock extends DeesElement {
 
   @query('.block')
   private blockElement: HTMLDivElement;
+  
+  // Track if we've initialized the content
+  private contentInitialized: boolean = false;
 
   public static styles = [
     cssManager.defaultStyles,
@@ -250,11 +253,30 @@ export class DeesWysiwygBlock extends DeesElement {
     `,
   ];
 
-  protected shouldUpdate(): boolean {
+  protected shouldUpdate(changedProperties: Map<string, any>): boolean {
+    // Never update if only the block content changed
+    if (changedProperties.has('block') && this.block) {
+      const oldBlock = changedProperties.get('block');
+      if (oldBlock && oldBlock.id === this.block.id && oldBlock.type === this.block.type) {
+        // Only content or metadata changed, don't re-render
+        return false;
+      }
+    }
+    
     // Only update if the block type or id changes
-    // Content changes are handled directly in the DOM
     return !this.blockElement || this.block?.type !== this.blockElement.dataset.blockType;
   }
+  
+  public firstUpdated(): void {
+    // Mark that content has been initialized
+    this.contentInitialized = true;
+    
+    // Ensure the block element maintains its content
+    if (this.blockElement) {
+      this.blockElement.setAttribute('data-block-id', this.block.id);
+      this.blockElement.setAttribute('data-block-type', this.block.type);
+    }
+  }
 
   render(): TemplateResult {
     if (!this.block) return html``;