fix: add glm-5.1 to model catalog

[bluzername]

Problem

When using glm-5.1 model via claudish, the status line shows wrong context usage (always 100%) because glm-5.1 is not in the model catalog. It falls through to the generic glm- fallback which has 131k context window - probably not matching the real context window of the model.

The claudish-bot comment on #90 already identified this: "glm-5.1 isn't in the model catalog yet — only glm-5 and glm-4.7 are listed."

Fix

Added glm-5.1 entry to the model catalog in model-catalog.ts:

{ pattern: "glm-5.1", contextWindow: 128_000, supportsVision: true },

Placed before glm-5-turbo and glm-5 entries (catalog is ordered by specificity, first match wins) so glm-5.1 matches exactly instead of falling through to the shorter glm-5 pattern.

Set supportsVision: true same as glm-5 since the 5.x series supports vision.

Also added a test case in e2e-model-catalog.test.ts verifying the new entry returns correct context window and vision support.

Note

This addresses only part of #90 (the model catalog gap). The other parts (model name display from token file, and usage tracking for Z.AI provider) are separate issues that need investigation with --debug logs as the bot suggested.

Ref #90

[kenan-xin]

@bluzername , the context window for glm5.1 is 204800

source: https://docs.z.ai/devpack/using5.1

[builderpepc]

I think you meant to tag @bluzername