feat: publish HoloLake model-native living system source

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

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+# Notes
+
+A note is a Markdown file with optional YAML frontmatter. HoloLake Era reads the first H1 as the primary title and keeps the file on disk as the durable representation.
+
+## Anatomy
+
+```md
+---
+type: Project
+status: Active
+belongs_to:
+  - "[[workspace]]"
+---
+
+# Launch Documentation
+
+Draft the public HoloLake Era docs and keep them close to code changes.
+```
+
+## Titles
+
+The first H1 is the note title. HoloLake Era uses that title wherever the note is displayed: note lists, search results, wikilink suggestions, relationship pickers, tabs, and window titles.
+
+The title is separate from the filename. The filename stays visible in the breadcrumb so you can see the file on disk, and you can rename it independently when needed.
+
+Use the breadcrumb action to rename the file to match the title. New untitled notes can also auto-rename from the first H1 the first time they get a real title. Turn this behavior off in Settings > Vault Content > Titles & Filenames if you prefer filenames to stay unchanged until you rename them manually.
+
+## Body Links
+
+Use `[[wikilinks]]` to connect notes from the body. HoloLake Era shows autocomplete suggestions while you type, and links can resolve by filename or title.
+
+## Frontmatter
+
+Use frontmatter for structured fields such as type, status, date, URL, and relationships. Keep free-form thinking in the body.
+
+Some notes can be displayed with specialized editors while keeping the same file-first model. A note with `_display: sheet` opens as a spreadsheet and stores its cells in a CSV-like body, while `type` remains available for organization. See [Spreadsheets](/concepts/spreadsheets).