docs: sync /docs with main — Grafana Cloud catalog, lean TUI banner, memory path sanitization

[aheritier]

Documentation updates

This PR brings /docs in sync with three code changes merged to main in the last 36 hours.

Changes

Source PR	File	Doc change
#3139 feat(mcpcatalog): add Grafana Cloud remote MCP server	docs/tools/mcp-catalog/index.md	Added "grafana" to the keyword examples in the Workflow section, so users discover the new monitoring/observability server when browsing the catalog docs
#3147 Add a banner in the lean TUI	docs/features/cli/index.md	Updated the --lean flag table row and the callout tip to note that the lean TUI displays an ASCII art banner on startup
#3146 fix(memory): sanitise reserved characters in default-path config segment	docs/tools/memory/index.md	Added a sentence to the Overview noting that when an agent is loaded from an OCI reference, reserved characters in the config name are sanitised in the storage path segment

PRs reviewed and found up to date

Source PR	Reason
#3131 feat: warn on unpinned external agent refs and document digest pinning	Docs updated within the PR
#3133 Disable old tool-call truncation by default	Docs updated within the PR
#3136 docs: update docs for --lean TUI, --session new-id, and hook agent_name	Was itself a docs PR
#3143 docs: update CHANGELOG.md for v1.81.2	Was itself a docs PR (automated release)
#3120 Better worktree handling	Docs (--worktree-base, --worktree-pr) updated within the PR
#3124 Improve the TUI control API	Docs updated within the PR
#3127 Secondary, non-alternate screen UI	--lean docs covered by #3136
#3135 fix(acp): respect workspace roots for Zed paths	Internal path-resolution fix; no user-facing config or API change
#3141 Use lipgloss and x/term for window size changes events	Internal TUI library change; no behavioral delta for users
#3149 chore: bump Go dependencies	Dependency bump only

[docker-agent]

Assessment: 🟢 APPROVE

This is a documentation-only PR syncing three doc files with recent code changes. The added content is accurate and consistent with the PR description.

Reviewed changes:

• docs/tools/mcp-catalog/index.md — Added "grafana" keyword example ✅
• docs/features/cli/index.md — Added ASCII art banner note to --lean flag description ✅
• docs/tools/memory/index.md — Added OCI reserved-character sanitisation note ✅

No bugs or high/medium severity issues found in the changed lines.