fix(vscode): preserve active editor pane

[lambertjosh]

Summary

• Open new Kilo chats in the currently selected editor group instead of creating and locking a group to the right.
• Open and reveal Kilo Settings and Profile in the selected editor group rather than forcing column one.
• Guard against reintroducing explicit group creation, locking, or text-editor-based column selection.

Why

The previous Open in Tab implementation inferred placement from visibleTextEditors, which excludes webview-only groups. In multi-pane layouts it could create one group, place the fresh Kilo chat in another, and leave the new group empty. Locking that group also caused later file opens to split around it. Settings separately forced column one, unexpectedly focusing and resizing an unrelated pane.

Using ViewColumn.Active preserves the user-selected pane and lets VS Code add each surface as a normal tab without rearranging the workspace.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (4 files)

• .changeset/steady-editor-tabs.md
• packages/kilo-vscode/src/SettingsEditorProvider.ts
• packages/kilo-vscode/src/extension.ts
• packages/kilo-vscode/tests/unit/extension-arch.test.ts

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_{Reviewed by claude-sonnet-5 · Input: 20 · Output: 4K · Cached: 411.2K}

_{Review guidance: REVIEW.md from base branch main}