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/dom/forms.mjs

@@ -1,4 +1,4 @@
-// web-test dom/forms v1.0 — form detection, content read, click-target/field-button resolution
+// web-test dom/forms v1.1 — form detection, content read, click-target/field-button resolution
 // Source: https://github.com/Nikolay-Shirokov/cc-1c-skills
 import { DETECT_FORM_FN, READ_FORM_FN } from './_shared.mjs';
 
@@ -396,3 +396,29 @@ export function resolveFieldsScript(formNum, fields) {
     return results;
   })()`;
 }
+
+/**
+ * Detect a new form opened above `prevFormNum`. Two modes:
+ *   default (broad) — counts any visible `[id]` element; finds dialogs whose
+ *     `a.press` buttons have empty IDs. Used by selectValue / fillTableRow.
+ *   `{ strict: true }` — only counts visible interactive elements
+ *     (`input.editInput[id], a.press[id]`); used by fillReferenceField.
+ *
+ * Returns the highest new form number or `null`.
+ */
+export function detectNewFormScript(prevFormNum, { strict = false } = {}) {
+  const selector = strict ? 'input.editInput[id], a.press[id]' : '[id]';
+  const visibleCheck = strict
+    ? 'el.offsetWidth === 0'
+    : 'el.offsetWidth === 0 && el.offsetHeight === 0';
+  return `(() => {
+    const forms = {};
+    document.querySelectorAll(${JSON.stringify(selector)}).forEach(el => {
+      if (${visibleCheck}) return;
+      const m = el.id.match(/^form(\\d+)_/);
+      if (m) forms[m[1]] = true;
+    });
+    const nums = Object.keys(forms).map(Number).filter(n => n > ${prevFormNum});
+    return nums.length > 0 ? Math.max(...nums) : null;
+  })()`;
+}