fix(zenmux:minimax): remove duplicated prefix & feat(zenmux:openai): add GPT-5.2-Pro model

[Phoen1xCode]

Changes

1. Fix MiniMax M2.5 Lightning model name (zenmux provider) to maintain consistency

• Removed the duplicated provider prefix MiniMax: from the model display name
• "MiniMax: MiniMax M2.5 highspeed" → "MiniMax M2.5 highspeed"

2. Add GPT-5.2-Pro model (zenmux provider)

• Added OpenAI GPT-5.2-Pro model definition
• Key specs:
  • 400K context / 128K output
  • Supports: attachments, reasoning, tool calls
  • Input modalities: text, image, pdf
  • Cost: $21.00 input / $168.00 output per 1M tokens
  • Knowledge cutoff: 2025-08-31

[Copilot]

Pull request overview

Updates Zenmux provider model metadata to keep display names consistent and to expand the OpenAI catalog.

Changes:

• Removed duplicated MiniMax: prefix from the MiniMax M2.5 Lightning model display name.
• Added a new Zenmux OpenAI model definition for GPT-5.2-Pro (limits, modalities, pricing, capabilities metadata).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
providers/zenmux/models/openai/gpt-5.2-pro.toml	Adds the GPT-5.2-Pro model metadata (capabilities, limits, modalities, cost).
providers/zenmux/models/minimax/minimax-m2.5-lightning.toml	Normalizes the MiniMax Lightning model display name by removing a duplicated provider prefix.

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