🔄 chore: Enforce 18next Language Keys

[rubentalstra]

Summary

This PR updates and refines the project’s translation and localization system to enforce stricter type safety and consistency across the codebase. The key changes include:

• i18next Type Improvements:

  • Added a module augmentation in client/src/@types/i18next.d.ts to define the CustomTypeOptions with defaultNS, resources, and enabling strictKeyChecks.
  • This change ensures that only valid translation keys (typed as TranslationKeys) are used in the project.

• Refactoring Translation Key Usages:

  • Updated various components (such as in Chat, Settings, dynamic UI elements, and more) to replace plain strings with the new TranslationKeys type.
  • Adjusted calls to the localization hook (e.g., useLocalize) so that translation keys are now strongly typed and validated at compile time.

• Workflow and ESLint Updates:

  • Modified the i18n unused keys workflow (in .github/workflows/i18n-unused-keys.yml) to format the output as checkboxes, making it easier for manual checks.
  • Updated ESLint configuration (in eslint.config.mjs) to reflect the new i18next rules and ensure that literal strings are not used where translation keys are expected.

• Additional Minor Changes:

  • Tweaks in .gitignore, package configuration files, and various UI components (e.g., dynamic inputs, dropdowns, switches, and textareas) to support the new translation typing.
  • Updated tests and startup components to handle errors and headers using the new TranslationKeys types.

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Change Type

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Translation update

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Testing

To verify these changes:

1. Local Testing:

   • Run the application locally and navigate through areas where text is rendered (chat, settings, dynamic form inputs, etc.) to ensure all translations display correctly.
   • Confirm that components which use dynamic inputs (e.g., dropdowns, checkboxes, textareas) render with the proper localized labels and placeholders.

2. Linting & Type Checking:

   • Run the linter to ensure that there are no violations regarding literal strings in localized components.
   • Run the TypeScript compiler to verify that all translation keys adhere to the new TranslationKeys type.

3. CI/CD Verification:

   • Check the GitHub Actions workflow (especially the i18n unused keys workflow) to ensure that it reports unused translation keys in the expected checkbox format.

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Checklist

• My code adheres to this project's style guidelines.
• I have performed a self-review of my own code.
• I have commented in any complex areas of my code where necessary.
• My changes do not introduce new warnings or errors.
• I have written tests or performed manual testing demonstrating that my changes work as expected.
• Any changes that depend on these updates have been merged or will be updated accordingly.

[github-actions]

🚨 Unused i18next Keys Detected

The following translation keys are defined in translation.json but are not used in the codebase:

• com_auth_email_verification_rate_limited
• com_auth_reset_password_email_sent
• com_auth_username_required
• com_endpoint_anthropic_custom_name_placeholder
• com_endpoint_bing_context_placeholder
• com_endpoint_bing_enable_sydney
• com_endpoint_bing_jailbreak
• com_endpoint_bing_system_message_placeholder
• com_endpoint_bing_to_enable_sydney
• com_endpoint_config_key_chatgpt
• com_endpoint_config_key_chatgpt_copy_token
• com_endpoint_config_key_chatgpt_then_visit
• com_endpoint_config_key_edge_full_key_string
• com_endpoint_config_key_edge_instructions
• com_endpoint_config_key_expiry
• com_endpoint_config_key_get_edge_key
• com_endpoint_config_key_get_edge_key_dev_tool
• com_endpoint_config_key_name_placeholder
• com_endpoint_default_creative
• com_endpoint_default_false
• com_endpoint_disabled_with_tools
• com_endpoint_disabled_with_tools_placeholder
• com_endpoint_hide
• com_endpoint_new_topic
• com_endpoint_not_available
• com_endpoint_not_implemented
• com_endpoint_plug_resend_images
• com_endpoint_preset_clear_all_confirm
• com_endpoint_save_convo_as_preset
• com_endpoint_show
• com_endpoint_show_what_settings
• com_endpoint_system_message
• com_endpoint_token_count
• com_endpoint_tone_style
• com_endpoint_view_options
• com_error_invalid_action_error
• com_error_invalid_request_error
• com_error_no_system_messages
• com_nav_archive_all
• com_nav_archive_all_chats
• com_nav_command_settings
• com_nav_command_settings_description
• com_nav_commands_tab
• com_nav_delete_account_confirm_placeholder
• com_nav_info_delete_cache_storage
• com_nav_info_revoke
• com_nav_media_source_init_error
• com_nav_shared_links_date_shared
• com_nav_shared_links_empty
• com_nav_shared_links_name
• com_nav_source_chat
• com_ui_agent_already_shared_to_all
• com_ui_bulk_delete_partial_error
• com_ui_categories
• com_ui_chats
• com_ui_connect
• com_ui_drag_drop_file
• com_ui_duplicate_agent_confirm
• com_ui_entries
• com_ui_experimental
• com_ui_finance
• com_ui_idea
• com_ui_loading
• com_ui_misc
• com_ui_model_save_success
• com_ui_more_options
• com_ui_new_footer
• com_ui_no_conversation_id
• com_ui_no_prompt_description
• com_ui_pay_per_call
• com_ui_prompt_shared_to_all
• com_ui_renaming_var
• com_ui_roleplay
• com_ui_search_categories
• com_ui_select_a_category
• com_ui_service_http
• com_ui_share_created_message
• com_ui_share_retrieve_error
• com_ui_share_updated_message
• com_ui_shop
• com_ui_showing
• com_ui_success
• com_ui_teach_or_explain
• com_ui_title
• com_ui_travel
• com_ui_write

⚠️ Please remove these unused keys to keep the translation files clean.