feat: publish HoloLake model-native living system source

product-source/hololake-platform/site/start/first-launch.md

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+# First Launch
+
+The first launch flow is designed to get you into a real vault quickly without hiding the local-first model.
+
+## What You Choose
+
+HoloLake Era asks whether you want to:
+
+- Create or clone the Getting Started vault.
+- Open an existing local vault.
+- Create a new empty vault.
+
+The Getting Started vault is cloned locally and then disconnected from its remote. That keeps the sample safe to edit without accidentally pushing tutorial changes.
+
+## What HoloLake Era Creates
+
+HoloLake Era stores app-level settings on the local machine. Your notes stay in the vault folder you choose.
+
+| Data | Stored in |
+| --- | --- |
+| Notes and attachments | Your vault folder |
+| Type definitions and saved views | Your vault folder |
+| Window size, zoom, recent vaults | Local app settings |
+| Cache data | Rebuildable local cache |
+
+## First Commands To Try
+
+- `Cmd+K` / `Ctrl+K`: open the command palette.
+- `New Note`: create a note in the current vault.
+- `Open Getting Started Vault`: clone the public sample vault.
+- `Reload Vault`: rescan files after external edits.
+
+## AI Setup Prompt
+
+HoloLake Era can show an optional AI agents prompt after a vault is open. It checks common local install locations for supported coding agents and gives you setup paths, but you can dismiss it and use HoloLake Era without AI.