feat: CMS-editable nav, categories taxonomy, site settings

- Move top nav from hugo.toml menus to data/nav.yml (CMS-editable)
- Add categories taxonomy alongside tags
- Add Decap CMS settings collection for nav management
- Add categories field to articles and essays in CMS config

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

site/data/nav.yml

@@ -0,0 +1,23 @@
+- name: Home
+  url: /
+  weight: 1
+
+- name: Docs
+  url: /docs/
+  weight: 2
+
+- name: Notes
+  url: /notes/
+  weight: 3
+
+- name: Essays
+  url: /essays/
+  weight: 4
+
+- name: Articles
+  url: /articles/
+  weight: 5
+
+- name: Tags
+  url: /tags/
+  weight: 6

site/hugo.toml

@@ -7,37 +7,11 @@ title = 'ASW — Agentic Semantic Web'
 
 [taxonomies]
   tag = "tags"
+  category = "categories"
 
-# ── Navigation menus ──────────────────────────────────────────────────
-[[menus.main]]
-  name = "Home"
-  url  = "/"
-  weight = 1
-
-[[menus.main]]
-  name = "Docs"
-  url  = "/docs/"
-  weight = 2
-
-[[menus.main]]
-  name = "Notes"
-  url  = "/notes/"
-  weight = 3
-
-[[menus.main]]
-  name = "Essays"
-  url  = "/essays/"
-  weight = 4
-
-[[menus.main]]
-  name = "Articles"
-  url  = "/articles/"
-  weight = 5
-
-[[menus.main]]
-  name = "Tags"
-  url  = "/tags/"
-  weight = 6
+# ── Navigation ──────────────────────────────────────────────────────
+# Top nav is driven by data/nav.yml (editable via Decap CMS).
+# Docs sidebar is auto-generated from content/docs/ subdirectories.
 
 # ── Docs sidebar ─────────────────────────────────────────────────────
 # Auto-generated from content/docs/ subdirectories.

site/layouts/partials/nav.html

@@ -1,8 +1,8 @@
 <nav>
   <ul><li><a href="/"><strong>{{ .Site.Title }}</strong></a></li></ul>
   <ul>
-    {{- range .Site.Menus.main }}
-    <li><a href="{{ .URL }}"{{ if $.IsMenuCurrent "main" . }} aria-current="page"{{ end }}>{{ .Name }}</a></li>
+    {{- range sort .Site.Data.nav "weight" }}
+    <li><a href="{{ .url }}"{{ if eq (relURL .url) $.RelPermalink }} aria-current="page"{{ end }}>{{ .name }}</a></li>
     {{- end }}
   </ul>
 </nav>

site/static/admin/config.yml

@@ -17,7 +17,26 @@ slug:
   encoding: ascii
   clean_accents: true
 
+# ── Site settings (file-based collections) ───────────────────────────
+
 collections:
+  - name: settings
+    label: Settings
+    files:
+      - name: nav
+        label: Navigation
+        file: data/nav.yml
+        fields:
+          - label: Navigation Links
+            name: items
+            widget: list
+            fields:
+              - { label: Name, name: name, widget: string }
+              - { label: URL, name: url, widget: string }
+              - { label: Weight, name: weight, widget: number, hint: "Sort order (lower = first)" }
+
+# ── Content collections ──────────────────────────────────────────────
+
   - name: docs-getting-started
     label: "Docs: Getting Started"
     folder: content/docs/getting-started
@@ -66,6 +85,7 @@ collections:
       - { label: Title, name: title, widget: string }
       - { label: Description, name: description, widget: string, required: false }
       - { label: Date, name: date, widget: datetime, format: "YYYY-MM-DD" }
+      - { label: Categories, name: categories, widget: list, required: false, hint: "e.g. framework, tutorial, deep-dive" }
       - { label: Tags, name: tags, widget: list, required: false }
       - { label: AI Disclosure, name: ai-disclosure, widget: select, options: ["generated", "assisted", "none"], default: "assisted" }
       - { label: AI Model, name: ai-model, widget: string, required: false }
@@ -88,6 +108,7 @@ collections:
       - { label: Date, name: date, widget: datetime, format: "YYYY-MM-DD" }
       - { label: Tags, name: tags, widget: list, required: false }
       - { label: Draft, name: draft, widget: boolean, default: true }
+      - { label: Categories, name: categories, widget: list, required: false }
       - { label: AI Disclosure, name: ai-disclosure, widget: select, options: ["generated", "assisted", "none"], default: "assisted" }
       - { label: AI Model, name: ai-model, widget: string, required: false }
       - { label: AI Provider, name: ai-provider, widget: string, required: false, default: "Anthropic" }