Port vault section (5 pages) and docs section (11 pages)

- content/vault/: _index.md, diff.md, session.md, status.md, tasks.md, wikilinks.md
- content/docs/: _index.md, introduction, tokens, reset, semantic-html,
  components, data-attributes, navigation, layouts, charts, chroma, accordion-dialog

96 pages build clean (was 36). Docs use sidebar nav + TOC layout.
Vault uses sidebar with section fallback (no vault menu configured yet).
URLs fixed: playground refs → asw.trentuna.com.

Closes: asw#12, asw#9

content/vault/tasks.md

@@ -0,0 +1,38 @@
+---
+title: "Tasks"
+description: "Render task lists with semantic state: done, wip, blocked, todo."
+section: vault
+prev-url: ""
+prev-title: ""
+next-url: "wikilinks/"
+next-title: "Wikilinks"
+type: vault
+date: 2026-04-09
+tags: ["vault", "tasks", "reference"]
+ai-disclosure: "generated"
+ai-model: "claude-sonnet-4-5"
+ai-provider: "Anthropic"
+
+---
+
+## Overview
+
+Use `data-task` on list items to convey task state without CSS classes.
+
+```html
+<ul>
+  <li data-task="done">Completed item</li>
+  <li data-task="wip">Work in progress</li>
+  <li data-task="blocked">Blocked item</li>
+  <li data-task="todo">Not started</li>
+</ul>
+```
+
+## States
+
+| Value | Meaning |
+|-------|---------|
+| `done` | Completed — green check |
+| `wip` | In progress — amber |
+| `blocked` | Blocked — red |
+| `todo` | Not started — muted |