chore: v0.5.11 — cross-platform fix, utility hoists, git-cliff

[jgs-jeeves]

v0.5.11

Changes

• chore: migrate changelog from auto-changelog to git-cliff #95 — Migrate changelog from auto-changelog to git-cliff
• seedContent() creates literal j:/config/ directory on Linux #100 — Fix Linux/macOS path leak in seedContent() — reject Windows drive-letter paths on non-Windows platforms
• Hoist substituteEnvVars to @karmaniverous/jeeves core #90 — Hoist substituteEnvVars to core (server variant with stricter prototype guard)
• Hoist Slack file download fallback pattern to jeeves-core #93 — Hoist Slack file download fallback pattern to managed TOOLS.md Platform section

Quality

• Lint: ✅ zero errors, zero warnings
• Typecheck: ✅ clean
• Build: ✅ clean (5 bundles)
• Tests: ✅ 443 passing across 51 test files
• Knip: ✅ clean
• Dependencies: updated (all patch/minor)

Downstream

• jeeves-watcher#202 — consume hoisted substituteEnvVars
• jeeves-server#144 — consume hoisted substituteEnvVars

Closes #95, closes #100, closes #90, closes #93

[gemini-code-assist]

Code Review

This pull request introduces a new substituteEnvVars utility to deep-walk config objects and resolve environment variables, adds a platform check to reject Windows drive-letter paths on non-Windows platforms, updates the changelog generation tool from auto-changelog to git-cliff, and adds documentation for Slack file downloads. Feedback on the changes suggests improving the object prototype check in substituteEnvVars to also support objects created with Object.create(null) by allowing a null prototype.

[gemini-code-assist]

The current check for plain objects (Object.getPrototypeOf(value) === Object.prototype) will skip objects created with Object.create(null), which have a null prototype. In JavaScript/TypeScript, Object.create(null) is a common pattern for creating clean dictionary/map objects.

To ensure environment variables are also substituted in these objects, we should allow a null prototype as well.

Suggested change

	if (
	value !== null &&
	typeof value === 'object' &&
	Object.getPrototypeOf(value) === Object.prototype
	) {
	if (
	value !== null &&
	typeof value === 'object' &&
	(Object.getPrototypeOf(value) === Object.prototype || Object.getPrototypeOf(value) === null)
	) {