[New] LLM corrupted image detection

[douglasdotc]

Description

This PR adds a new keyword to detect corrupted images.

Resolved issues

ZAP-1424

Documentation

Added automatically

Tests

1. Start Ollama Qwen model following: https://canonical-yarf.readthedocs-hosted.com/latest/how-to/using-the-llm-client/
2. Start Mir server.
3. Start YARF Interactive:

$ yarf --platform Mir


INFO: *** Welcome to the YARF interactive console. ***
INFO: You can use this console to execute Robot Framework keywords interactively.
INFO: The value of ${CURDIR} is CWD, you can change it using the `Set Variable` keyword.
INFO: You can press RIGHT_ARROW to auto-complete the keyword.
INFO: You can press CRTL + SPACE to view supported keywords on a prefix.
>>>>> Enter interactive shell
iRobot can interpret single or multiple keyword calls,
as well as FOR, IF, WHILE, TRY
and resource file syntax like *** Keywords*** or *** Variables ***.

Type "help" for more information.
> Configure Llm Client   model=qwen3-vl:2b-instruct
> Check For Visual Corruption                                                                                                                                   # ΔT: 0.001s
< {'corrupted': True, 'description': 'The image is entirely black, which is a typical indication of a corrupted or missing image.'}
> Check For Visual Corruption                                                                                                                               # ΔT: 171.163s
< {'corrupted': False, 'description': 'The image shows a file manager window displaying various folders and files on a dark theme, with a proper layout and no signs of corruption or noise.'}

[Copilot]

Pull request overview

Adds a new Robot Framework keyword to use the configured multimodal LLM to assess whether the current screenshot (or a provided image) appears corrupted, and updates the generated library reference docs accordingly.

Changes:

• Add Detect Corrupted Image keyword to LlmClient (screenshot capture + LLM prompt + JSON parsing).
• Add helper to fetch other RF library instances via BuiltIn().get_library_instance.
• Regenerate reference docs for the new keyword.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 7 comments.

File	Description
yarf/rf_libraries/libraries/llm_client/LlmClient.py	Adds the new corrupted-image detection keyword and related helper/validation logic.
docs/reference/rf_libraries/libraries/llm_client/library-LlmClient.md	Documents the newly added keyword in the generated RF library reference.

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[p-gentili]

Cool stuff! Some comments below, mostly to focus more on UX and stability.

[p-gentili]

Found some issues in the code itself

LGTM - leaving the testing to Fernando

[fernando79513]

LGTM +1!

[p-gentili]

Tested with this beauty (a problem with mesa apparently) running Qwen3.5 4B