Update app.py

Make identical to wan777: base Wan2.2-I2V-A14B + wan777 code/deps/gradio

Revert model to WAMU-Merge-VisualEffects lightning (user: base+lightx2v anatomy bad)

wan555: revert model to base Wan2.2-I2V-A14B + lightx2v 4-step LoRA

Raise GPU duration cap 140 -> 145 (~290s reported, still under 300 cap)

Cap GPU duration reservation at 140s to clear free-tier per-call limit

Increase BASE_STEP_DURATION 5->15 (reserve enough ZeroGPU time to finish 10s), matching wan222/wan444

Upgrade to WAMU_v3 + default 4 steps (faster)

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test

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