TC4 [Functional] Verify that admin can search streetcodes by name, number, and author using the search field.

[caroline1212]

Priority: high

Preconditions

1. Admin user is logged in.
2. Admin panel at https://historycode.online/admin-panel is open.
3. The “Каталог стріткодів” section is open and fully loaded.
4. The search field is visible and active.

Steps to reproduce

1. In the search field, type the name of an existing streetcode (e.g., “Сергій Жадан”).
2. Click on the “X” to clear the search and check that all streetcodes reappear.
3. Repeat steps 1–2 using a valid streetcode number (e.g., “534”).
4. Repeat steps 1–2 using the author name (e.g., “blackonblackua”).

Expected result

• After each entry, the text is displayed in the search field.
• The entered value is searched, and the result is displayed on the page.
• After clicking "X" button, the search field is cleared, and a list of all streetcodes is displayed on the page.

Postconditions

1. Admin remains in the “Каталог стріткодів” section.
2. The list of all streetcodes sorted by the last modification date.

User story: #1160

Related bug: