Remove model picker category

[lramos15]

No description provided.

[Copilot]

Pull request overview

This PR removes the “model picker category” concept from VS Code’s chat/language model plumbing, including the proposed chatProvider API surface and the internal metadata used for model selection and sorting. This simplifies model ordering (now name-based) and removes now-obsolete test expectations.

Changes:

• Removed LanguageModelChatInformation.category from the proposed vscode.proposed.chatProvider API.
• Removed internal modelPickerCategory handling (including default category constant) and switched sorting to name.localeCompare(...).
• Updated unit tests and fixtures to no longer provide/expect category fields.

Show a summary per file

File	Description
src/vscode-dts/vscode.proposed.chatProvider.d.ts	Removes proposed API category field (breaking change; version bump needed).
src/vs/workbench/contrib/chat/common/languageModels.ts	Drops modelPickerCategory from internal model metadata interface.
src/vs/workbench/contrib/chat/browser/defaultModelContribution.ts	Simplifies model sorting to name-only.
src/vs/workbench/api/common/extHostLanguageModels.ts	Removes mapping from proposed category into internal metadata.
src/vs/workbench/contrib/chat/browser/agentSessions/agentHost/agentHostLanguageModelProvider.ts	Stops emitting modelPickerCategory in provided model metadata.
src/vs/workbench/contrib/chat/common/widget/input/modelPickerWidget.ts	Removes default category constant; file is now empty.
src/vs/workbench/contrib/chat/test/common/tools/builtinTools/runSubagentTool.test.ts	Updates test fixtures to drop modelPickerCategory.
src/vs/workbench/contrib/chat/test/common/languageModels.test.ts	Removes default category constant usage and category-related metadata fields.
src/vs/workbench/contrib/chat/test/browser/widget/input/chatModelSelectionLogic.test.ts	Updates test model factory to omit modelPickerCategory.
src/vs/workbench/contrib/chat/test/browser/widget/input/chatModelPicker.test.ts	Updates test model factory to omit modelPickerCategory.
src/vs/workbench/contrib/chat/test/browser/promptSyntax/languageProviders/promptValidator.test.ts	Updates inline model metadata fixtures to omit modelPickerCategory.
src/vs/workbench/contrib/chat/test/browser/promptSyntax/languageProviders/promptHovers.test.ts	Updates inline model metadata fixtures to omit modelPickerCategory.
src/vs/workbench/contrib/chat/test/browser/promptSyntax/languageProviders/promptHeaderAutocompletion.test.ts	Updates inline model metadata fixtures to omit modelPickerCategory.
src/vs/workbench/contrib/chat/test/browser/chatManagement/chatModelsViewModel.test.ts	Removes category fields from model fixtures.
src/vs/sessions/contrib/providers/agentHost/test/browser/agentHostModelPicker.test.ts	Updates agent host model fixture to omit modelPickerCategory.

Copilot's findings

Comments suppressed due to low confidence (1)

src/vs/workbench/contrib/chat/common/widget/input/modelPickerWidget.ts:7

• This file no longer exports anything and appears to be unused (no remaining references to modelPickerWidget or DEFAULT_MODEL_PICKER_CATEGORY). Consider deleting the file entirely to avoid carrying an empty/dead module forward.

/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

• Files reviewed: 14/15 changed files
• Comments generated: 0