refactor(web): модуляризация модальных окон index.html и синхронизация диагностических слепков

modules/web_api/static/modals/admin_modal.html

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+<div id="admin-modal" class="fixed inset-0 bg-slate-900/60 backdrop-blur-sm z-50 flex items-center justify-center p-4 hidden">
+    <div class="bg-white rounded-2xl shadow-2xl border border-slate-200 max-w-lg w-full p-6 flex flex-col gap-4 max-h-[85vh]">
+        <div class="flex items-center justify-between">
+            <h3 class="text-sm font-bold text-slate-800 flex items-center gap-1.5">
+                <i class="fa-solid fa-users-gear text-indigo-600"></i> Управление учетными записями
+            </h3>
+            <button onclick="closeAdminModal()" class="text-slate-400 hover:text-slate-600"><i class="fa-solid fa-xmark"></i></button>
+        </div>
+
+        <form onsubmit="handleCreateUser(event)" class="p-3 bg-slate-50 border border-slate-200 rounded-xl flex flex-col gap-2">
+            <span class="text-xs font-bold text-slate-700">Создать нового пользователя:</span>
+            <div class="grid grid-cols-2 gap-2">
+                <input type="text" id="new-user-username" placeholder="Логин" required class="text-xs px-2.5 py-1.5 border border-slate-300 rounded-lg bg-white" />
+                <input type="password" id="new-user-password" placeholder="Пароль" required class="text-xs px-2.5 py-1.5 border border-slate-300 rounded-lg bg-white" />
+            </div>
+            <input type="text" id="new-user-fullname" placeholder="ФИО" class="text-xs px-2.5 py-1.5 border border-slate-300 rounded-lg bg-white" />
+            <div class="flex items-center justify-between">
+                <label class="flex items-center gap-1.5 text-xs text-slate-600 cursor-pointer">
+                    <input type="checkbox" id="new-user-admin" class="rounded border-slate-300 text-indigo-600" />
+                    <span>Права администратора</span>
+                </label>
+                <button type="submit" class="px-3 py-1 bg-indigo-600 hover:bg-indigo-700 text-white rounded-lg text-xs font-bold shadow">
+                    Создать
+                </button>
+            </div>
+        </form>
+
+        <div class="flex-1 overflow-y-auto flex flex-col gap-1.5" id="admin-users-list">
+            <div class="text-center py-4 text-xs text-slate-400">Загрузка пользователей...</div>
+        </div>
+    </div>
+</div>