fix(classifier): drop vestigial Save-All delays that masked a fixed await bug

saveAllFiles() carried a 200ms inter-operation sleep "to prevent race
conditions" plus a 300ms post-error "settle" sleep. But saveFile() is fully
awaited and each iteration renames a distinct file, so the saves are already
serialized — the sleeps were the band-aid for an earlier missing-await bug
(the "ensure properly awaited" comment marks where that got fixed). Remove
both: correctness comes from the awaits, the operations are independent, and
Save All no longer pays 200ms per file (≈10s on a 50-file batch).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

classifier/js/spreadsheet.js

@@ -755,10 +755,10 @@
             const { file, index } = modifiedFiles[i];
             
             try {
-                // Add small delay between operations to prevent race conditions
-                if (i > 0) {
-                    await new Promise(resolve => setTimeout(resolve, 200));
-                }
+                // No inter-operation delay: saveFile() is fully awaited and
+                // each iteration renames a distinct file, so the saves are
+                // already serialized. (The old 200ms sleep papered over an
+                // earlier missing-await bug, since fixed.)
                 
                 // Validate before saving
                 const newFilename = computeNewFilename(file, index);
@@ -801,8 +801,8 @@
                     errorCount++;
                     errors.push(`${zddc.joinExtension(file.originalFilename, file.extension)}: ${saveErr.message}`);
                     
-                    // Add delay after errors to let filesystem stabilize
-                    await new Promise(resolve => setTimeout(resolve, 300));
+                    // No post-error delay: each file is independent, so an
+                    // error on one doesn't require "settling" before the next.
                 }
             } catch (err) {
                 console.error(`Error processing file ${index}:`, err);

playwright.config.js

@@ -43,6 +43,10 @@ export default defineConfig({
       name: 'transmittal-drag-drop',
       testMatch: 'transmittal-drag-drop.spec.js',
     },
+    {
+      name: 'transmittal-validation',
+      testMatch: 'transmittal-validation.spec.js',
+    },
     {
       name: 'classifier',
       testMatch: 'classifier.spec.js',

tests/transmittal-validation.spec.js

@@ -0,0 +1,82 @@
+import { test, expect } from '@playwright/test';
+import { MOCK_FS_INIT_SCRIPT } from './fixtures/mock-fs-api.js';
+import * as path from 'path';
+
+const HTML_PATH = path.resolve('transmittal/dist/transmittal.html');
+
+// Covers the transmittal validation module (transmittal/js/validation.js),
+// which had no in-browser coverage:
+//   - the live #tracking-number aria-invalid binding (whitespace / underscore)
+//   - validateBeforePublish(): the publish-time gate that rejects a tracking
+//     number or a per-file tracking number / revision containing spaces or
+//     underscores.
+test.describe('Transmittal – validation', () => {
+    test.beforeEach(async ({ page }) => {
+        await page.addInitScript(MOCK_FS_INIT_SCRIPT);
+        await page.goto(`file://${HTML_PATH}`, { waitUntil: 'networkidle' });
+        await page.waitForSelector('#tracking-number');
+    });
+
+    test('tracking-number field flags whitespace and underscores live', async ({ page }) => {
+        const input = page.locator('#tracking-number');
+
+        await input.fill('123456-EL-TRX-0001');
+        await expect(input).toHaveAttribute('aria-invalid', 'false');
+
+        await input.fill('123456 EL TRX'); // space
+        await expect(input).toHaveAttribute('aria-invalid', 'true');
+        await expect(input).toHaveClass(/border-red-500/);
+
+        await input.fill('123456_EL_TRX'); // underscore
+        await expect(input).toHaveAttribute('aria-invalid', 'true');
+
+        await input.fill('123456-EL-TRX-0002'); // clean again — clears the flag
+        await expect(input).toHaveAttribute('aria-invalid', 'false');
+        await expect(input).not.toHaveClass(/border-red-500/);
+    });
+
+    test('validateBeforePublish passes for a clean transmittal', async ({ page }) => {
+        const result = await page.evaluate(() => {
+            const app = window.transmittalApp;
+            app.dom.qs('#tracking-number').value = '123456-EL-TRX-0001';
+            app.data.files = [{
+                trackingNumber: '123456-EL-SPC-2623', revision: 'A',
+                status: 'IFC', extension: 'pdf', title: 'Spec',
+                name: 'x', path: '', size: 0, fileSize: 0, sha256: '',
+            }];
+            return app.modules.validation.validateBeforePublish();
+        });
+        expect(result.ok).toBe(true);
+        expect(result.message).toBe('');
+    });
+
+    test('validateBeforePublish rejects a tracking number with spaces/underscores and focuses it', async ({ page }) => {
+        const result = await page.evaluate(() => {
+            const app = window.transmittalApp;
+            app.dom.qs('#tracking-number').value = 'BAD NUMBER_01';
+            app.data.files = [];
+            const r = app.modules.validation.validateBeforePublish();
+            return { ok: r.ok, message: r.message, focusId: r.focusEl ? r.focusEl.id : null };
+        });
+        expect(result.ok).toBe(false);
+        expect(result.message).toContain('spaces or underscores');
+        expect(result.focusId).toBe('tracking-number'); // gate points the user at the bad field
+    });
+
+    test('validateBeforePublish flags per-file bad tracking numbers and revisions by row', async ({ page }) => {
+        const result = await page.evaluate(() => {
+            const app = window.transmittalApp;
+            app.dom.qs('#tracking-number').value = '123456-EL-TRX-0001'; // header is clean
+            app.data.files = [
+                { trackingNumber: '123456 EL SPC', revision: 'A' },  // row 1: space in tracking
+                { trackingNumber: '123456-EL-DRW', revision: 'B 1' }, // row 2: space in revision
+            ];
+            return app.modules.validation.validateBeforePublish();
+        });
+        expect(result.ok).toBe(false);
+        expect(result.message).toContain('Row 1');
+        expect(result.message).toContain('Row 2');
+        expect(result.message).toMatch(/tracking number must not contain spaces or underscores/i);
+        expect(result.message).toMatch(/revision must not contain spaces/i);
+    });
+});