STUDIO CORRECTION — authored CAPA JavaScript labels (prepared, NOT applied)

Course: course-v1:rg+SEN001+2026
Station/unit: Station 4, «Чому соціально-емоційні навички в освітньому процесі?»
Exercise: «Який це стрес?»
Problem block: block-v1:rg+SEN001+2026+type@problem+block@3dde186fdb784efbb521e3a7fd46d915

Confirmed defect
The problem's authored translateSubmitBtn() writes numeric HTML entities into button.textContent/input.value. JavaScript does not decode HTML entities in strings. Learners see the entity sequence instead of «Надіслати»; its width creates horizontal overflow on phones. The select placeholder has the same issue and should read «Оберіть варіант». The script runs immediately and again after300/900ms, so this is not a short loading state.

Important serialization detail
The current platform source (edx-platform HEAD d746405b96, common/lib/capa/capa/capa_problem.py:784) calls etree.tostring(...).decode('utf-8') without an encoding argument. Default ASCII XML serialization converts non-ASCII characters inside JavaScript to numeric entities. Replacing the authored string with literal Ukrainian alone can therefore recreate the bug. Use ASCII JavaScript Unicode escapes, which become readable Ukrainian only when JavaScript runs. Do not use innerHTML or decode arbitrary HTML.

Precise Studio edit
Open the problem block above in Studio's advanced XML editor. Preserve all questions, answer keys, grading settings, and existing unrelated content. Within its existing <script type="text/javascript"> block only, replace the two submit assignments and the placeholder assignment with the lines below. If Studio already shows readable Ukrainian in those strings, replace those string literals with the Unicode escapes anyway.

Readable expected labels: Надіслати, Оберіть варіант

      if (firstOption) firstOption.textContent = '\u041e\u0431\u0435\u0440\u0456\u0442\u044c \u0432\u0430\u0440\u0456\u0430\u043d\u0442';
          if (btn.tagName === 'INPUT') btn.value = '\u041d\u0430\u0434\u0456\u0441\u043b\u0430\u0442\u0438';
          else btn.textContent = '\u041d\u0430\u0434\u0456\u0441\u043b\u0430\u0442\u0438';

The complete existing script with only those three string replacements is in unit4-studio-script-corrected.js. Its original rendered counterpart is in unit4-studio-script-original.js.

Captured visible button HTML
<button type="button" class="submit btn-brand" data-submitting="Submitting" data-value="Submit" data-should-enable-submit-button="True" aria-describedby="submission_feedback_3dde186fdb784efbb521e3a7fd46d915">&amp;#1053;&amp;#1072;&amp;#1076;&amp;#1110;&amp;#1089;&amp;#1083;&amp;#1072;&amp;#1090;&amp;#1080;</button>

Expected validation after editing/publishing this individual block
1. Reload the learner page and wait at least1second; verify the button text is exactly «Надіслати» and the empty select option is «Оберіть варіант», without ampersand/entity text.
2. At320/360/390/430px, measure the button bounds and page scrollWidth; this button should no longer cause horizontal page overflow. Confirm its action remains available.
3. With a dedicated test learner, select answers and submit; after CAPA redraw and900ms, labels remain readable and grading/feedback still works. Confirm Show Answer/Reset labels are unchanged.
4. Check desktop rendering and the original answer-choice values.

Status: source cause confirmed; correction prepared for review. No course data, grading state, repository code, or live page was changed by this artifact preparation. The theme MR does not contain this correction.

Learner source URL: https://lms.vector-stage.prozori.in.ua/courses/course-v1:rg+SEN001+2026/courseware/f3c6468315b44bd2bf85438355ec1126/c186a3fb28e745b19ef70373891675fd/4?activate_block_id=block-v1%3Arg%2BSEN001%2B2026%2Btype%40vertical%2Bblock%40f3ebfd24bb664d1f824346eda2d0d573