feat(config): add global nav.toc setting with frontmatter override

- Add toc: bool to [nav] config section (default: false)
- Frontmatter toc: true/false overrides global config
- If frontmatter toc is not specified, falls back to config.nav.toc
- Enable nav.toc = true in docs/site.toml for global TOC

docs/content/features/templates.md

@@ -2,7 +2,6 @@
 title: Tera Templates
 description: Customizable templates without recompilation
 weight: 1
-toc: true
 ---
 
 sukr uses [Tera](https://tera.netlify.app/), a Jinja2-like templating engine. Templates are loaded at runtime, so you can modify them without recompiling sukr.

docs/site.toml

@@ -10,3 +10,4 @@ templates = "templates"
 
 [nav]
 nested = true
+toc    = true

src/config.rs

@@ -28,6 +28,9 @@ pub struct SiteConfig {
 pub struct NavConfig {
     /// Whether to display nested navigation (default: false).
     pub nested: bool,
+    /// Enable table of contents (anchor nav) globally (default: false).
+    /// Can be overridden per-page via frontmatter toc field.
+    pub toc: bool,
 }
 
 /// Path configuration with sensible defaults.

src/main.rs

@@ -159,7 +159,7 @@ fn run(config_path: &Path) -> Result<()> {
         let page_path = format!("/{}/index.html", section.name);
         let item_contexts: Vec<_> = items
             .iter()
-            .map(|c| ContentContext::from_content(c, &content_dir))
+            .map(|c| ContentContext::from_content(c, &content_dir, &config))
             .collect();
         let html = engine.render_section(
             &section.index,

src/template_engine.rs

@@ -45,7 +45,10 @@ impl TemplateEngine {
     ) -> Result<String> {
         let mut ctx = self.base_context(page_path, config, nav);
         ctx.insert("title", &content.frontmatter.title);
-        ctx.insert("page", &FrontmatterContext::from(&content.frontmatter));
+        ctx.insert(
+            "page",
+            &FrontmatterContext::new(&content.frontmatter, config),
+        );
         ctx.insert("content", html_body);
         ctx.insert("anchors", anchors);
         self.render("page.html", &ctx)
@@ -68,7 +71,10 @@ impl TemplateEngine {
             .unwrap_or("content/default.html");
         let mut ctx = self.base_context(page_path, config, nav);
         ctx.insert("title", &content.frontmatter.title);
-        ctx.insert("page", &FrontmatterContext::from(&content.frontmatter));
+        ctx.insert(
+            "page",
+            &FrontmatterContext::new(&content.frontmatter, config),
+        );
         ctx.insert("content", html_body);
         ctx.insert("anchors", anchors);
         self.render(template, &ctx)
@@ -88,7 +94,10 @@ impl TemplateEngine {
 
         let mut ctx = self.base_context(page_path, config, nav);
         ctx.insert("title", &section.frontmatter.title);
-        ctx.insert("section", &FrontmatterContext::from(&section.frontmatter));
+        ctx.insert(
+            "section",
+            &FrontmatterContext::new(&section.frontmatter, config),
+        );
         ctx.insert("items", items);
         self.render(&template, &ctx)
     }
@@ -154,8 +163,9 @@ pub struct FrontmatterContext {
     pub toc: bool,
 }
 
-impl From<&crate::content::Frontmatter> for FrontmatterContext {
-    fn from(fm: &crate::content::Frontmatter) -> Self {
+impl FrontmatterContext {
+    /// Create context from frontmatter with config fallback for toc.
+    pub fn new(fm: &crate::content::Frontmatter, config: &SiteConfig) -> Self {
         Self {
             title: fm.title.clone(),
             description: fm.description.clone(),
@@ -163,7 +173,7 @@ impl From<&crate::content::Frontmatter> for FrontmatterContext {
             tags: fm.tags.clone(),
             weight: fm.weight,
             link_to: fm.link_to.clone(),
-            toc: fm.toc.unwrap_or(false),
+            toc: fm.toc.unwrap_or(config.nav.toc),
         }
     }
 }
@@ -178,9 +188,9 @@ pub struct ContentContext {
 }
 
 impl ContentContext {
-    pub fn from_content(content: &Content, content_dir: &Path) -> Self {
+    pub fn from_content(content: &Content, content_dir: &Path, config: &SiteConfig) -> Self {
         Self {
-            frontmatter: FrontmatterContext::from(&content.frontmatter),
+            frontmatter: FrontmatterContext::new(&content.frontmatter, config),
             body: content.body.clone(),
             slug: content.slug.clone(),
             path: format!("/{}", content.output_path(content_dir).display()),