[None][docs] fix visual_gen README cosmos3 and qwen-edit example paths

[imitater-dou]

Summary

• Retarget deleted examples/visual_gen/models/cosmos3_ti2v.py references to models/cosmos3/cosmos3.py (Cosmos3 example lives under models/cosmos3/).
• Correct qwen-image-edit --visual_gen_args config from nonexistent configs/qwen-image-edit-2511-fp4-1gpu.yaml to configs/qwen-image-edit-2511-fp8-1gpu.yaml.

Verification

• Confirmed at 96a25c48b258: tree has examples/visual_gen/models/cosmos3/cosmos3.py and configs/qwen-image-edit-2511-fp8-1gpu.yaml; no cosmos3_ti2v.py and no fp4 edit YAML.
• cosmos3.py accepts --prompt and defaults --model to nvidia/Cosmos3-Nano.

Signed-off-by: ADou ikun3.1415927@gmail.com

Dev Engineer Review

Updated README commands to reference examples/visual_gen/models/cosmos3/cosmos3.py and the existing FP8 Qwen configuration. Removed references to deleted or nonexistent paths. No runtime code changed.

QA Engineer Review

No test changes.

Per-File QA Perspective

• examples/visual_gen/README.md: Verify the commands from the examples/visual_gen directory. Confirm Cosmos3 generation, Qwen image editing with the FP8 configuration, and PNG, MP4, and AVI output formats.

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• examples/visual_gen/README.md

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Walkthrough

The VisualGen README now uses the current Cosmos3 script, the FP8 Qwen image-edit configuration, and updated PNG, MP4, and AVI output-format guidance.

Changes

VisualGen README updates

Layer / File(s)	Summary
Update VisualGen examples examples/visual_gen/README.md	Cosmos3 commands now use models/cosmos3/cosmos3.py. The Qwen image-edit example uses the FP8 configuration. Output formats now specify PNG for images and MP4 or AVI for videos.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to 55635

VisualGen documentation now points users to the current Cosmos3 script and supported FP8 Qwen image-edit configuration; no actionable current-head merge risk remains.

Suggested reviewers: bowenfu

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies a documentation fix for the VisualGen Cosmos3 and Qwen image-edit example paths. It is concise and directly related to the changes.
Description check	✅ Passed	The description explains the problem, the documentation changes, and the verification performed. It omits the template's exact Description, Test Coverage, and PR Checklist sections, but the required c…
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Automatically added "ci: full pre-merge approved" because this PR has satisfied the required GitHub review approvals. Unresolved review conversations and other required checks remain independent merge requirements.