feat: agent app support upload video

[fatelei]

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Summary

fix #30570

agent app support upload video

Screenshots

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after

Screen.Recording.2026-01-06.at.09.35.07.mov

Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran make lint and make type-check (backend) and cd web && npx lint-staged (frontend) to appease the lint gods

[gemini-code-assist]

Summary of Changes

Hello @fatelei, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the agent application by adding comprehensive support for video uploads. It integrates new UI components, manages feature visibility through configuration flags, and provides multilingual support for the new functionality, allowing models to leverage video content for advanced processing.

Highlights

• Video Upload Feature: Introduces the capability for the agent application to support video uploads, enabling models to process video files for transcription and analysis.
• UI Integration: A new ConfigVideo component has been integrated into the application's configuration UI, allowing users to manage video-related settings.
• Feature Flag Management: Adds isShowVideoConfig to control the visibility of video configuration options based on the model's supported features.
• Internationalization: New localization strings for the video upload feature have been added across multiple languages, ensuring a consistent user experience globally.

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[gemini-code-assist]

Code Review

This pull request adds support for video uploads in the agent app. The changes include adding a new configuration component for video, updating the context to handle video feature flags, and adding a new video icon. I've found a point of code duplication that could be refactored for better maintainability. Additionally, many internationalization files have been updated with placeholder English text instead of the proper translations. Please address these points.