Recent projects list (multi-project mode)

[Oaklight]

Problem

tinyleaf can launch in two modes:

• Multi-project: tinyleaf with no folder arg — root view lets you pick a project
• Single-project: tinyleaf /path/to/project — pinned to one folder

In multi-project mode, jumping between recently used projects requires re-navigating the tree.

Proposed

• Track recently opened projects (timestamp + path) in ~/.config/tinyleaf/recent.json or similar
• In multi-project mode: show a 'Recent' list on the landing page
• Top-bar dropdown for quick switching between recent projects
• Cap list (e.g. last 10), allow pinning

Notes

Single-project mode: feature is a no-op (or list is just the one pinned project).

Priority: P2