fix(exports): add missing #| export directives across 10 modules

Systematic audit of all 20 modules against module-developer agent rules
found 9 standalone helper functions missing #| export — these are called
by exported code at runtime but were excluded from the generated package,
causing NameError/AttributeError in CI.

Modules fixed:
- 05_dataloader: _pad_image, _random_crop_region (used by RandomCrop)
- 06_autograd: _stable_softmax, _one_hot_encode (prior session)
- 07_optimizers: 5 mixin classes + monkey-patches (prior session)
- 08_training: 7 monkey-patched Trainer methods (prior session)
- 10_tokenization: _count_byte_pairs, _merge_pair (used by BPETokenizer)
- 11_embeddings: _compute_sinusoidal_table (prior session)
- 12_attention: _compute_attention_scores, _scale_scores, _apply_mask (prior)
- 15_quantization: _collect_layer_inputs, _quantize_single_layer (used by quantize_model)
- 18_memoization: _cached_generation_step, _create_cache_storage, _cached_attention_forward (used by enable_kv_cache)
- 19_benchmarking: rename TinyMLPerf→MLPerf, fix monkey-patch naming (prior)

Also includes: vscode-ext icon refactor (ThemeIcon migration).

All 789 tests pass (unit, integration, e2e, CLI).

tinytorch/vscode-ext/src/models/treeItems.ts

@@ -4,13 +4,14 @@ import { ModuleInfo, CommandRunRecord } from '../types';
 /** A module entry in the Modules tree */
 export class ModuleTreeItem extends vscode.TreeItem {
   constructor(public readonly module: ModuleInfo) {
-    const icon = module.status === 'completed' ? '$(pass-filled)'
-               : module.status === 'started'   ? '$(edit)'
-               : '$(circle-outline)';
+    const iconId = module.status === 'completed' ? 'pass-filled'
+                 : module.status === 'started'   ? 'edit'
+                 : 'circle-outline';
     super(
-      `${icon}  ${module.number} — ${module.title ?? module.displayName}`,
+      `${module.number} — ${module.title ?? module.displayName}`,
       vscode.TreeItemCollapsibleState.Collapsed,
     );
+    this.iconPath = new vscode.ThemeIcon(iconId);
     this.contextValue = 'module';
     this.tooltip = `Module ${module.number}: ${module.title ?? module.displayName}\nStatus: ${module.status.replace('_', ' ')}`;
     this.description = module.status === 'not_started' ? '' : module.status.replace('_', ' ');
@@ -25,12 +26,11 @@ export class ActionTreeItem extends vscode.TreeItem {
     args: unknown[] = [],
     icon?: string,
   ) {
-    // Visually offset leaf actions under expanded categories in sidebars.
-    super(`  ${label}`, vscode.TreeItemCollapsibleState.None);
-    this.command = { command: commandId, title: label, arguments: args };
+    super(label, vscode.TreeItemCollapsibleState.None);
     if (icon) {
       this.iconPath = new vscode.ThemeIcon(icon);
     }
+    this.command = { command: commandId, title: label, arguments: args };
     this.contextValue = 'action';
   }
 }
@@ -40,8 +40,10 @@ export class CategoryTreeItem extends vscode.TreeItem {
   constructor(
     label: string,
     public readonly categoryId: string,
+    icon?: string,
   ) {
     super(label, vscode.TreeItemCollapsibleState.Expanded);
+    this.iconPath = new vscode.ThemeIcon(icon ?? 'symbol-folder');
     this.contextValue = 'category';
   }
 }
@@ -49,11 +51,12 @@ export class CategoryTreeItem extends vscode.TreeItem {
 /** An entry in the Run History tree */
 export class RunHistoryTreeItem extends vscode.TreeItem {
   constructor(public readonly record: CommandRunRecord) {
-    const icon = record.status === 'succeeded' ? '$(pass)'
-               : record.status === 'failed'    ? '$(error)'
-               : '$(loading~spin)';
+    const iconId = record.status === 'succeeded' ? 'pass'
+                 : record.status === 'failed'    ? 'error'
+                 : 'loading~spin';
     const time = new Date(record.timestamp).toLocaleTimeString();
-    super(`${icon}  ${record.label}`, vscode.TreeItemCollapsibleState.None);
+    super(record.label, vscode.TreeItemCollapsibleState.None);
+    this.iconPath = new vscode.ThemeIcon(iconId);
     this.description = time;
     this.tooltip = `${record.label}\n${record.command}\n${time}`;
     this.command = {

tinytorch/vscode-ext/src/providers/buildTreeProvider.ts

@@ -14,10 +14,10 @@ export class BuildTreeProvider implements vscode.TreeDataProvider<TreeNode> {
   getChildren(element?: TreeNode): TreeNode[] {
     if (!element) {
       return [
-        new CategoryTreeItem('Site (HTML)', 'site'),
-        new CategoryTreeItem('PDF Course Guide', 'pdf'),
-        new CategoryTreeItem('Research Paper', 'paper'),
-        new CategoryTreeItem('Utilities', 'utilities'),
+        new CategoryTreeItem('Site (HTML)', 'site', 'globe'),
+        new CategoryTreeItem('PDF Course Guide', 'pdf', 'file-pdf'),
+        new CategoryTreeItem('Research Paper', 'paper', 'book'),
+        new CategoryTreeItem('Utilities', 'utilities', 'tools'),
       ];
     }
 

tinytorch/vscode-ext/src/providers/testTreeProvider.ts

@@ -40,9 +40,9 @@ export class TestTreeProvider implements vscode.TreeDataProvider<TreeNode> {
   getChildren(element?: TreeNode): TreeNode[] {
     if (!element) {
       return [
-        new CategoryTreeItem('Run All', 'all'),
-        new CategoryTreeItem('By Stage (CI Pipeline)', 'stages'),
-        new CategoryTreeItem('Single Module', 'module'),
+        new CategoryTreeItem('Run All', 'all', 'run-all'),
+        new CategoryTreeItem('By Stage (CI Pipeline)', 'stages', 'layers'),
+        new CategoryTreeItem('Single Module', 'module', 'symbol-method'),
       ];
     }