fix(web-test): fillFields date/time fields — paste instead of selectValue

Date fields have a CB (Choose Button) that opens a calendar, not a selection
form. fillFields detected hasPick → delegated to selectValue → error
"DLB click did not open a popup or selection form".

Fix: detect date fields by `iCalendB` CSS class on CB button (dom.mjs),
propagate `isDate` flag through field mapping, and use clipboard paste
for date fields instead of selectValue. Reference fields with CB (without
iCalendB) continue using selectValue as before.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude/skills/web-test/scripts/browser.mjs

@@ -1805,8 +1805,19 @@ export async function fillFields(fields) {
         // Combobox/reference with DLB: DLB-first, then paste fallback
         const refResult = await fillReferenceField(selector, r.field, fields[r.field], formNum);
         results.push(refResult);
+      } else if (r.hasPick && r.isDate) {
+        // Date/time field with calendar CB — use paste (calendar is not a selection form)
+        await page.click(selector);
+        await page.waitForTimeout(200);
+        await page.keyboard.press('Control+A');
+        await page.evaluate(`navigator.clipboard.writeText(${JSON.stringify(String(fields[r.field]))})`);
+        await page.keyboard.press('Control+V');
+        await page.waitForTimeout(300);
+        await page.keyboard.press('Tab');
+        await waitForStable();
+        results.push({ field: r.field, ok: true, value: String(fields[r.field]), method: 'paste' });
       } else if (r.hasPick) {
-        // Reference field without DLB (non-editable): delegate to selectValue (F4 → selection form)
+        // Reference field with CB (non-editable or editable ref): delegate to selectValue (F4 → selection form)
         const svResult = await selectValue(r.field, String(fields[r.field]));
         if (svResult?.error) {
           results.push({ field: r.field, error: svResult.error, message: svResult.message });

.claude/skills/web-test/scripts/dom.mjs

@@ -1189,7 +1189,11 @@ export function resolveFieldsScript(formNum, fields) {
       const label = (titleEl?.innerText?.trim() || '').replace(/\\n/g, ' ').replace(/:$/, '');
       const last = { inputId: el.id, name, label };
       if (document.getElementById(p + name + '_DLB')?.offsetWidth > 0) last.hasSelect = true;
-      if (document.getElementById(p + name + '_CB')?.offsetWidth > 0) last.hasPick = true;
+      const cbEl = document.getElementById(p + name + '_CB');
+      if (cbEl?.offsetWidth > 0) {
+        last.hasPick = true;
+        if (cbEl.classList.contains('iCalendB')) last.isDate = true;
+      }
       allFields.push(last);
     });
     // Checkboxes
@@ -1268,6 +1272,7 @@ export function resolveFieldsScript(formNum, fields) {
         if (found.isRadio) { entry.isRadio = true; entry.options = found.options; }
         if (found.hasSelect) entry.hasSelect = true;
         if (found.hasPick) entry.hasPick = true;
+        if (found.isDate) entry.isDate = true;
         if (found._dcsCheckbox) {
           entry.dcsCheckbox = { inputId: found._dcsCheckbox.inputId, checked: found._dcsCheckbox.checked };
           delete found._dcsCheckbox;