#1667: fix ide env triggering unintended tool installations

[maybeec]

Summary

Fixes #1667 - Running ide without arguments was triggering unexpected downloads and installations.

Root Cause

The issue occurred because EnvironmentCommandlet.setEnvironmentVariablesInLocalTools() iterates through all local tools and calls isInstalled() on each. For package-manager-based tools (pip, npm, yarn, etc.), the inherited isInstalled() implementation was calling getInstalledVersion() → computeInstalledVersion() → runPackageManager() without skipInstallation=true, which triggered installation cascades.

See detailed analysis in issue comment.

Solution

Override isInstalled() in PackageManagerBasedLocalToolCommandlet to use file existence check with SystemPath.findBinary() instead of version computation. This prevents triggering the package manager during environment setup while still correctly detecting installed tools.

Changes

• ✅ Override isInstalled() in PackageManagerBasedLocalToolCommandlet using platform-specific binary resolution
• ✅ Add @implNote warning to computeInstalledVersion() JavaDoc
• ✅ Remove redundant isInstalled() from NodeBasedCommandlet (now inherited)
• ✅ Add test testRunWithoutArgumentsDoesNotTriggerInstallation() in IdeasyTest
• ✅ Update CHANGELOG.adoc

Testing

• All existing tests pass (2/2 in IdeasyTest, 2/2 in EnvironmentCommandletTest)
• New test verifies running ide without arguments doesn't create new tool directories

Checklist

• Changes comply with coding conventions
• All tests pass locally
• Test added to verify fix
• CHANGELOG.adoc updated
• Commit message follows format: #«issue-id»: «describe your change»

[coveralls]

Pull Request Test Coverage Report for Build 21099077048

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 13 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.009%) to 70.346%

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Files with Coverage Reduction	New Missed Lines	%
com/devonfw/tools/ide/tool/node/NodeBasedCommandlet.java	3	78.26%
com/devonfw/tools/ide/tool/PackageManagerBasedLocalToolCommandlet.java	10	81.61%

Totals
Change from base Build 21013786095:	-0.009%
Covered Lines:	10444
Relevant Lines:	14259

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💛 - Coveralls

[hohwille]

@maybeec thanks for your PR. Awesome that you did the analysis and fix of this issue.
I definitely want to get this merged and included in the upcoming release. 👍
Since I need some more time to review, I will postpone the release by 1-2 days to get all your great work into it...

[hohwille]

@maybeec thanks again for this great PR. 👍
So scanning vor env variables iterating the commandlets, we ran every package manager based commandlet triggering an installation that checked for updates and installed them if available.
I now understand why I only saw the download and extract progress bar but no info what tool this is about:
When we run ide env we disable our regular logging and suppress all messages except the environment variables. However, the progress-bar component we are using is not using our logging infrastructure and directly writes to the console bypassing this (see #627).
So this was actually the tool uv (for python/pip) that ships updates very frequently.

I left a small suggestion for improvement. Apart from that we can merge this and finally fix the bug.