feat(vscode): add multi-root analysis workflows

[ben-ranford]

Summary

Adds multi-root VS Code analysis workflows for #495, #496, #609, #610, #611, #612, and #613.

Changes

• add multi-root workspace tracking, per-folder refresh handling, and active-folder resolution
• add dependency explorer and dependency detail workflows
• thread baseline, runtime trace, threshold, and policy settings through the VS Code runner
• add single-dependency analysis and export commands for JSON, CSV, SARIF, and PR-comment output
• expand extension report typings and add a deterministic smoke CLI fixture for e2e coverage

Validation

Commands run locally by the worker:

npm --prefix extensions/vscode-lopper install
npm --prefix extensions/vscode-lopper run compile
npm --prefix extensions/vscode-lopper run test:e2e

CI was otherwise green except for repository metadata/feature-flag enforcement.

Risk and compatibility

• Breaking changes: none intended for existing extension commands.
• Migration required: none.
• Performance impact: additional commands and explorer refreshes are scoped to the active workspace folder.
• Memory benchmark impact: none expected.

Closes #495
Closes #496
Closes #609
Closes #610
Closes #611
Closes #612
Closes #613

Checklist

• Tests added/updated for behavior changes
• Docs updated (README/docs/schema) if needed
• memory-approved requested/applied if intentional memory benchmark regressions exceed CI thresholds
• No unrelated changes included
• Ready for review

[github-actions]

Feature flag enforcement

• Feature PR: yes (feat PR title)
• Check: passed
• Rule: feature PRs must add a feature flag, new flags must start as preview, and feature flag ids and names must be unique.

New feature flags in this PR

• LOP-FEAT-0007 vscode-multi-root-workflows-preview (preview) - Enable multi-root VS Code analysis workflows, dependency explorer detail views, baseline commands, and export commands.

Result

Passed. This feature PR adds at least one new preview feature flag.

[github-actions]

Memory Benchmarks

Thresholds: bytes/op <= +15.0%, allocs/op <= +10.0%

Benchmark	Base B/op	Head B/op	Delta B/op	Base allocs/op	Head allocs/op	Delta allocs/op	Status
github.com/ben-ranford/lopper/internal/lang/shared/BenchmarkCountUsage	25632.0	25632.3	+0.0%	375.0	375.0	+0.0%	ok
github.com/ben-ranford/lopper/internal/lang/shared/BenchmarkCountUsageRegexPerIdentifier	415222.0	415010.0	-0.1%	3067.0	3067.0	+0.0%	ok
github.com/ben-ranford/lopper/internal/report/BenchmarkFormatLargeTable	256165.7	256169.7	+0.0%	3064.0	3064.0	+0.0%	ok

Result: memory benchmark gate passed.

Approval: not required.

[github-actions]

Lopper (Delta)

Metric delta	Value
Dependency count	+0
Used percent	+0.0%
Waste percent	+0.0%
Estimated unused bytes	+0 B
Known licenses	+0
Unknown licenses	+0
Denied licenses	+0

Changed	Regressions	Progressions	Added	Removed	Unchanged
0	0	0	0	0	9

No dependency-surface deltas detected.

[github-actions]

SonarQube (PR)

Open issues: 0
Actionable issues shown (excluding mock/fixture files): 0

Duplication

• Overall duplicated lines: 619
• Overall duplication density: 0.50%
• New duplicated lines: n/a
• New duplication density: n/a

Issues

Open Sonar issues (0)

#	Severity	Rule	Location	Message
-	-	-	-	No open Sonar issues for this PR.

Source: SonarCloud PR view

[Copilot]

Pull request overview

This PR significantly expands the VS Code extension surface to support multi-root workspaces and a richer set of analysis workflows (dependency explorer + detail drilldown, baseline save/compare, runtime-trace runs, export formats), and updates the e2e harness with a deterministic CLI fixture.

Changes:

• Add multi-root aware refresh routing plus a new “Lopper” explorer view and dependency detail webview.
• Thread baseline, runtime trace, thresholds/policy settings, single-dependency analysis, and export formats through the runner and command surface.
• Update report typings and e2e fixtures/tests to cover the expanded workflows.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
extensions/vscode-lopper/test-fixtures/lopper-smoke-binary.mjs	Adds deterministic CLI fixture output for extension smoke/e2e flows.
extensions/vscode-lopper/src/types.ts	Extends report typings to include baseline/runtime/policy/cache and richer dependency metadata.
extensions/vscode-lopper/src/test/suite/smoke.test.ts	Updates smoke test to exercise multi-root behavior and new command surface.
extensions/vscode-lopper/src/test/suite/refreshLifecycle.test.ts	Updates harness stubs to match new runner interface (export support).
extensions/vscode-lopper/src/test/suite/lopperRunner.test.ts	Adds coverage for runtime/baseline/export flag threading and new executor API.
extensions/vscode-lopper/src/test/runTest.mjs	Switches e2e to multi-root workspace launch and uses the deterministic fixture binary.
extensions/vscode-lopper/src/lopperRunner.ts	Adds export support and threads runtime/baseline/threshold/policy flags into CLI invocations.
extensions/vscode-lopper/src/extension.ts	Adds multi-root controller logic, explorer tree, dependency detail webview, baseline/runtime/export/dependency commands.
extensions/vscode-lopper/README.md	Documents new sidebar, multi-root support, settings, and commands.
extensions/vscode-lopper/package.json	Contributes new commands, view, and configuration settings; expands activation events.

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