feat: gate feed/sitemap generation on config

Wire config.feed.enabled and config.sitemap.enabled
into main.rs run() function. Both default to true,
so existing behavior is preserved.

Add 5 new tests: feed/sitemap config defaults,
independent disable, and ConfigContext nav structure
with base_url trailing-slash normalization.

Test suite: 69 → 73 tests, all passing.
Phase 1 complete — all plan items checked off.

docs/plans/api-stabilization.md

@@ -104,16 +104,16 @@ Items validated by codebase investigation:
    - [x] Update embedded frontmatter examples in documentation pages (7 files)
    - [x] Add `FeedConfig` and `SitemapConfig` structs to `config.rs` with `enabled: bool` (default `true`)
    - [x] Wire feed/sitemap config into `SiteConfig` deserialization
-   - [ ] Gate feed generation in `main.rs` on `config.feed.enabled`
+   - [x] Gate feed generation in `main.rs` on `config.feed.enabled`
-   - [ ] Gate sitemap generation in `main.rs` on `config.sitemap.enabled`
+   - [x] Gate sitemap generation in `main.rs` on `config.sitemap.enabled`
    - [x] Refactor `ConfigContext`: flat `nested_nav: bool` → nested `nav: NavContext { nested, toc }`
    - [x] Remove duplicate `base_url` top-level template variable injection
    - [x] Update `docs/templates/base.html`: `config.nested_nav` → `config.nav.nested`, `base_url` → `config.base_url`
    - [x] Delete `docs/templates/section/features.html` and `docs/templates/homepage.html`
    - [x] Add template section fallback in `render_section`: try `section/<type>.html`, fall back to `section/default.html`
    - [x] Update/fix all existing tests to use TOML frontmatter
-   - [ ] Add new tests: TOML parsing, date validation (valid + invalid), feed/sitemap config gating
+   - [x] Add new tests: TOML parsing, date validation (valid + invalid), feed/sitemap config gating
-   - [ ] Verify all 69 existing tests pass (updated for TOML)
+   - [x] Verify all 69 existing tests pass (updated for TOML)
 
 2. **Phase 2: Draft & Alias Features** — implement filtering and redirect generation
    - [ ] Filter items where `draft == true` from `collect_items()` results

src/config.rs

@@ -161,4 +161,52 @@ mod tests {
         assert_eq!(config.paths.static_dir, PathBuf::from("assets"));
         assert_eq!(config.paths.templates, PathBuf::from("theme"));
     }
+
+    #[test]
+    fn test_feed_sitemap_defaults() {
+        let toml = r#"
+            title = "Test"
+            author = "Author"
+            base_url = "https://example.com"
+        "#;
+
+        let config: SiteConfig = toml::from_str(toml).unwrap();
+        assert!(config.feed.enabled, "feed should be enabled by default");
+        assert!(
+            config.sitemap.enabled,
+            "sitemap should be enabled by default"
+        );
+    }
+
+    #[test]
+    fn test_feed_disabled() {
+        let toml = r#"
+            title = "Test"
+            author = "Author"
+            base_url = "https://example.com"
+
+            [feed]
+            enabled = false
+        "#;
+
+        let config: SiteConfig = toml::from_str(toml).unwrap();
+        assert!(!config.feed.enabled);
+        assert!(config.sitemap.enabled, "sitemap unaffected");
+    }
+
+    #[test]
+    fn test_sitemap_disabled() {
+        let toml = r#"
+            title = "Test"
+            author = "Author"
+            base_url = "https://example.com"
+
+            [sitemap]
+            enabled = false
+        "#;
+
+        let config: SiteConfig = toml::from_str(toml).unwrap();
+        assert!(config.feed.enabled, "feed unaffected");
+        assert!(!config.sitemap.enabled);
+    }
 }

src/main.rs

@@ -183,8 +183,8 @@ fn run(config_path: &Path) -> Result<()> {
         eprintln!("  → {}", out_path.display());
     }
 
-    // 2. Generate Atom feed (blog posts only)
+    // 2. Generate Atom feed (blog posts only, if enabled)
-    if !manifest.posts.is_empty() {
+    if config.feed.enabled && !manifest.posts.is_empty() {
         generate_feed(&output_dir, &manifest, &config, &content_dir)?;
     }
 
@@ -194,8 +194,10 @@ fn run(config_path: &Path) -> Result<()> {
     // 4. Generate homepage
     generate_homepage(&manifest, &output_dir, &config, &engine)?;
 
-    // 5. Generate sitemap
+    // 5. Generate sitemap (if enabled)
-    generate_sitemap_file(&output_dir, &manifest, &config, &content_dir)?;
+    if config.sitemap.enabled {
+        generate_sitemap_file(&output_dir, &manifest, &config, &content_dir)?;
+    }
 
     eprintln!("done!");
     Ok(())

src/template_engine.rs

@@ -263,6 +263,32 @@ mod tests {
         assert_eq!(relative_prefix("/blog/posts/foo.html"), "../..");
     }
 
+    #[test]
+    fn test_config_context_nav_structure() {
+        let config = SiteConfig {
+            title: "Test".to_string(),
+            author: "Author".to_string(),
+            base_url: "https://example.com/".to_string(),
+            paths: crate::config::PathsConfig::default(),
+            nav: crate::config::NavConfig {
+                nested: true,
+                toc: true,
+            },
+            feed: crate::config::FeedConfig::default(),
+            sitemap: crate::config::SitemapConfig::default(),
+        };
+
+        let ctx = ConfigContext::from(&config);
+        assert!(ctx.nav.nested);
+        assert!(ctx.nav.toc);
+        assert_eq!(
+            ctx.base_url, "https://example.com",
+            "trailing slash trimmed"
+        );
+        assert_eq!(ctx.title, "Test");
+        assert_eq!(ctx.author, "Author");
+    }
+
     #[test]
     fn test_toc_config_fallback() {
         use crate::content::Frontmatter;