Add missing image_handler.py and image_verification.html for snapshot camera verification

[rquidute]

What Changed

• Add th_cli/test_run/camera/image_handler.py — implements ImageVerificationHandler, which starts a local HTTP server to serve the captured snapshot image and waits for a user PASS/FAIL response via the web UI
  • Add th_cli/test_run/camera/image_verification.html — HTML template rendered by the server, showing the snapshot and radio-button options for the user to submit a response
  • Export ImageVerificationHandler from th_cli/test_run/camera/init.py so it is importable by prompt_manager.py

Related Issue

project-chip/certification-tool#908

Testing

CLI is able to run TC-AVSM-2.10.
In order to reproduce the issue, I performed the command bellow since I don't have a proper DUT to perform the test run execution: gst-launch-1.0 v4l2src device=/dev/video0 num-buffers=1 ! videoconvert ! jpegenc ! filesink location=./capture_snapshot.jpg and rm -rf /tmp/chip_*;./chip-camera-app

[gemini-code-assist]

Summary of Changes

Hello, 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 introduces a new mechanism for visual verification of camera snapshots within the Matter Certification Tool's CLI. It establishes a local HTTP server to display captured images to the user and gather their pass/fail feedback through a dedicated web interface, streamlining the manual verification step in camera-related test cases.

Highlights

• New Image Verification Handler: Added image_handler.py which implements ImageVerificationHandler to serve snapshot images and collect user responses via a local HTTP server.
• Web User Interface for Verification: Added image_verification.html which provides the web UI for displaying the snapshot and allowing user input for verification.

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Changelog

• th_cli/test_run/camera/image_handler.py
  • Implemented a new Python module that sets up and manages a local HTTP server to display camera snapshots and process user verification responses.
• th_cli/test_run/camera/image_verification.html
  • Created a new HTML template that defines the user interface for the snapshot image verification process, including image display and interactive response options.

Activity

• The author tested the changes by running TC-AVSM-2.10 and provided specific commands to reproduce the issue and test the functionality.
• A screenshot of the new web interface was included to demonstrate the feature.

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[gemini-code-assist]

Code Review

This pull request introduces an ImageVerificationHandler for manual verification of snapshot images through a web UI, including a Python-based HTTP server and an HTML template. While the functionality is correctly implemented, there are several security concerns regarding the local HTTP server. Specifically, the server binds to all network interfaces (0.0.0.0) without authentication, uses a permissive CORS policy (*), and is vulnerable to Cross-Site Scripting (XSS) due to unescaped user-controlled values in the generated HTML. These issues could allow unauthorized users on the network or malicious websites to view snapshots and manipulate test results. Additionally, the review identifies a significant security vulnerability (CSRF) and offers suggestions to improve code quality by removing an unused parameter and refining exception handling for better robustness and maintainability.