[Web] Translate CreateFixRequestPanel

[mustafa-5493]

📝 [Web] Translate CreateFixRequestPanel

Description

Follow-up to #292. The "Submit a fix" flow off ReportPanel (frontend/src/components/CreateFixRequestPanel.jsx) is untouched , header, helper text, photo-upload labels, validation errors, action buttons, and success/failure toasts all still render in English regardless of the active language.

Feature / Task Details

• Sweep visible strings in CreateFixRequestPanel.jsx and replace with t() calls.
• Add a createFix.* namespace to en.json and tr.json (or extend report.* since the panel is launched from ReportPanel , either grouping is fine).
• File-validation messages ("Only JPEG/PNG…", "File too large…") need keys too.
• Skip Nominatim/backend-generated content; only translate strings authored client-side.

Deliverables

• Updated frontend/src/components/CreateFixRequestPanel.jsx
• Updated frontend/src/i18n/locales/en.json and tr.json
• Existing tests should keep passing (assertions on EN literals continue to match via the JSON values).

Acceptance Criteria

• In TR mode every visible string in the fix-request panel renders in Turkish
• EN mode is identical to before
• Validation errors (oversize / wrong MIME) follow the active language
• All existing tests pass