Fix Ollama model and preset command help text formatting

[Copilot]

Summary

This PR fixes the issue where /model and /preset command help text displayed all available models/presets in an unreadable single line format, making the output cluttered when multiple options are available.

Problem

When users ran /model or /preset commands without arguments, the help text would show all available models/presets concatenated on a single line:

Commands:
  list    List a specific model, or all available models. [model1, model2, model3, very-long-model-name, another-model, ...]
  use     Specify a model to use, or choose one from the available models. [model1, model2, model3, very-long-model-name, another-model, ...]

This became unreadable with multiple models/presets installed.

Solution

Removed the AddCompletions() calls from command arguments that were causing completion values to appear in help text. Users can still access properly formatted model/preset lists using:

• /model list - shows all available models in a clean table format
• /preset list - shows all available presets in a clean table format

Changes Made

• Removed AddCompletions calls: Removed 4 .AddCompletions() calls from ModelCommand and PresetCommand arguments
• Cleaned up unused code: Removed ModelNameCompleter method (15 lines) as it was no longer referenced
• Preserved error messages: Kept PresetNameCompleter method since it's still used for error message functionality

After the Fix

Help text is now clean and readable:

Commands:
  list    List a specific model, or all available models.
  use     Specify a model to use, or choose one from the available models.

Impact

• ✅ Clean, readable help text for /model and /preset commands
• ✅ All existing functionality preserved (/model list, /preset list, /model use, /preset use)
• ✅ Error messages still show available options when needed
• ⚠️ Tab completion no longer works for model/preset names (acceptable trade-off for clean help)

Total changes: 4 lines added, 19 lines removed - minimal and surgical fix.

Fixes #376.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• 7tjvsblobprodcus341.vsblob.vsassets.io
  • Triggering command: dotnet build AIShell.Abstraction/AIShell.Abstraction.csproj (dns block)
• c78vsblobprodcus322.vsblob.vsassets.io
  • Triggering command: dotnet build AIShell.Abstraction/AIShell.Abstraction.csproj (dns block)
• d0svsblobprodcus381.vsblob.vsassets.io
  • Triggering command: dotnet build AIShell.Abstraction/AIShell.Abstraction.csproj (dns block)
• h6tvsblobprodcus346.vsblob.vsassets.io
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• jd4vsblobprodcus366.vsblob.vsassets.io
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• l49vsblobprodcus358.vsblob.vsassets.io
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• u3hvsblobprodcus371.vsblob.vsassets.io
  • Triggering command: dotnet restore agents/AIShell.Ollama.Agent/AIShell.Ollama.Agent.csproj (dns block)
• uy6vsblobprodcus34.vsblob.vsassets.io
  • Triggering command: dotnet build AIShell.Abstraction/AIShell.Abstraction.csproj (dns block)
• vb4vsblobprodcus33.vsblob.vsassets.io
  • Triggering command: dotnet build AIShell.Abstraction/AIShell.Abstraction.csproj (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
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[StevenBucher98]

@daxian-dbw I'd need your expertise to determine if this is even close to right or not but wanted to try out the Copilot creation of PRs 😄

[cnupy]

@daxian-dbw I'd need your expertise to determine if this is even close to right or not but wanted to try out the Copilot creation of PRs 😄

It did exactly what it said - removed tab completions for /model and /preset commands 😆.
I couldn’t find a way to visually truncate the completion list when it gets too long, so this is a possible solution, though it does come at the cost of convenience.