feat: publish HoloLake model-native living system source

product-source/hololake-platform/site/concepts/properties.md

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+# Properties
+
+Properties are frontmatter fields that HoloLake Era can display, filter, and edit.
+
+## Suggested Properties
+
+Suggested properties are the fields HoloLake Era knows how to create quickly from the Properties panel. When a suggested property is missing, the panel shows a shortcut to add it with the right editor.
+
+| Field | Purpose |
+| --- | --- |
+| `type` | Groups the note into a type such as Project, Person, or Topic. |
+| `status` | Tracks lifecycle state such as Active, Done, or Blocked. |
+| `url` | Stores a canonical external link. |
+| `date` | Represents a single date. |
+
+## System Properties
+
+Fields that start with `_` are system properties. They remain in plain text but are hidden from normal property editing.
+
+Examples include `_icon`, `_color`, `_order`, `_sidebar_label`, `_width`, and `_pinned_properties` on type documents or notes.
+
+## Property Editing
+
+The Properties panel is the safest place to edit structured properties. Toggle it with `Cmd+Shift+I` on macOS or `Ctrl+Shift+I` on Windows and Linux.
+
+Date fields use HoloLake Era's picker, relationship fields can use wikilinks, and raw Markdown mode is available when you need direct control over YAML.