refactor(web-test): извлечены detect-new-form и edit-state из inline в dom/

Дедуплицированы 15 копий detect-new-form (13 в row-fill + 2 локальные
обёртки в select-value), 6 копий INPUT-focused, 4 проверки calendar/
calculator popup, 1 INPUT-focused-inside-grid.

Новое:
- dom/forms.mjs: detectNewFormScript(prev, {strict}) — объединяет broad
  и strict варианты
- dom/edit-state.mjs: isInputFocusedScript({allowTextarea}),
  isInputFocusedInGridScript, findOpenPopupScript
- helpers.mjs: переписан detectNewForm на dom-script; добавлены тонкие
  обёртки isInputFocused, isInputFocusedInGrid, findOpenPopup

Метрики row-fill: 1235 → 1065 LOC (−170), inline page.evaluate 47 → 20.
Поведение идентично; точечный регресс зелёный (02/03/05/06/10/16).
04-selectvalue auto-history шаг — pre-existing baseline issue (state-
driven, не связан с S1, воспроизводится на HEAD).

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

.claude/skills/web-test/scripts/engine/forms/select-value.mjs

@@ -14,8 +14,8 @@ import { highlight, unhighlight } from '../recording/highlight.mjs';
 import {
   safeClick, findFieldInputId, readEdd,
   detectNewForm as helperDetectNewForm,
-} from '../core/helpers.mjs';␍
-import { pasteText } from '../core/clipboard.mjs';
+} from '../core/helpers.mjs';
+import { pasteText } from '../core/clipboard.mjs';
 import { getFormState } from './state.mjs';
 
 /**
@@ -757,18 +757,9 @@ export async function selectValue(fieldName, searchText, { type } = {}) {
     if (!isChecked) { await page.click(cbSel); await waitForStable(); }
   }
 
-  // Helper: detect selection form (form number > formNum)
+  // Helper: detect selection form (form number > formNum, strict mode)
   async function detectSelectionForm() {
-    return page.evaluate(`(() => {
-      const forms = {};
-      document.querySelectorAll('input.editInput[id], a.press[id]').forEach(el => {
-        if (el.offsetWidth === 0) return;
-        const m = el.id.match(/^form(\\d+)_/);
-        if (m) forms[m[1]] = true;
-      });
-      const nums = Object.keys(forms).map(Number).filter(n => n > ${formNum});
-      return nums.length > 0 ? Math.max(...nums) : null;
-    })()`);
+    return helperDetectNewForm(formNum, { strict: true });
   }
 
   // detectNewForm is hoisted at the top of selectValue (see above).