fix(opencode): MiniMax models missing [provider] override and incorrectly have [interleaved] - #1

Problem

The minimax-m2.5.toml and minimax-m2.1.toml files in providers/opencode/models/ have two inconsistencies compared to their -free counterparts and compared to the pattern established in PR anomalyco#1254 for the ZenMux provider:

1. Missing [provider] override — The -free variants correctly define:

   [provider]
   npm = "@ai-sdk/anthropic"

   The non-free variants have no [provider] section.

2. Incorrectly has [interleaved] — The -free variants do NOT have an [interleaved] section. The non-free variants incorrectly include:

   [interleaved]
   field = "reasoning_content"

   PR feat(zenmux): route models through protocol-specific SDKs anomalyco/models.dev#1254 explicitly removed [interleaved] from all ZenMux MiniMax models when adding the [provider] override, because the @ai-sdk/anthropic route handles this differently.

Expected

Both minimax-m2.5 and minimax-m2.1 (non-free) should match their -free variants:

• Remove [interleaved] section entirely
• Add [provider] npm = "@ai-sdk/anthropic" section

This aligns with the design decision in PR anomalyco#1254: MiniMax models should route through @ai-sdk/anthropic with per-model provider overrides, not rely on [interleaved] for reasoning content handling.

Files affected

• providers/opencode/models/minimax-m2.5.toml
• providers/opencode/models/minimax-m2.1.toml