Fix dead links in documentation

Update relative links to use correct paths after VitePress migration:
- extensions.md -> /extensions/
- cookbook.md -> /cookbook/
- profiles.md -> /guide/profiles
- Remove reference to deleted profile-filter-examples.md
- Fix cookbook-*.md -> ./plaintext, ./markdown, ./ansi

Author: dereuromark

docs/cookbook/index.md

@@ -29,7 +29,7 @@ Common recipes and customizations for djot-php.
 
 ## External Links
 
-> **Tip:** Use the built-in [ExternalLinksExtension](extensions.md#externallinksextension) for common cases.
+> **Tip:** Use the built-in [ExternalLinksExtension](/extensions/#externallinksextension) for common cases.
 
 Open external links in a new tab with security attributes:
 
@@ -361,7 +361,7 @@ $converter->on('render.code_block', function (RenderEvent $event): void {
 
 ## Table of Contents Generation
 
-> **Tip:** Use the built-in [TableOfContentsExtension](extensions.md#tableofcontentsextension) for common cases.
+> **Tip:** Use the built-in [TableOfContentsExtension](/extensions/#tableofcontentsextension) for common cases.
 
 Generate a table of contents from headings:
 
@@ -502,7 +502,7 @@ echo $converter->convert($djot);
 
 ## Heading Anchors
 
-> **Tip:** Use the built-in [HeadingPermalinksExtension](extensions.md#headingpermalinksextension) for clickable permalink anchors.
+> **Tip:** Use the built-in [HeadingPermalinksExtension](/extensions/#headingpermalinksextension) for clickable permalink anchors.
 
 Add anchor links to headings:
 
@@ -622,7 +622,7 @@ $converter->on('render.raw_inline', function (RenderEvent $event) use ($allowedT
 
 ## Lazy Loading Images
 
-> **Tip:** Use the built-in [DefaultAttributesExtension](extensions.md#defaultattributesextension) for this.
+> **Tip:** Use the built-in [DefaultAttributesExtension](/extensions/#defaultattributesextension) for this.
 
 Add native lazy loading to all images:
 
@@ -1277,7 +1277,7 @@ Extend Djot with custom inline syntax by registering patterns on the InlineParse
 
 ### @Mentions
 
-> **Tip:** Use the built-in [MentionsExtension](extensions.md#mentionsextension) for common cases.
+> **Tip:** Use the built-in [MentionsExtension](/extensions/#mentionsextension) for common cases.
 
 Convert `@username` to profile links:
 
@@ -1801,9 +1801,9 @@ Useful boolean attributes for djot elements:
 ## Alternative Output Formats
 
 For detailed customization of alternative renderers, see:
-- [PlainText Cookbook](cookbook-plaintext.md) - PlainTextRenderer customizations
-- [Markdown Cookbook](cookbook-markdown.md) - MarkdownRenderer customizations
-- [ANSI Cookbook](cookbook-ansi.md) - AnsiRenderer customizations
+- [PlainText Cookbook](./plaintext) - PlainTextRenderer customizations
+- [Markdown Cookbook](./markdown) - MarkdownRenderer customizations
+- [ANSI Cookbook](./ansi) - AnsiRenderer customizations
 
 ### Plain Text Extraction
 

docs/guide/profiles.md

@@ -160,8 +160,6 @@ $html = $converter->convert('Check [this link](https://example.com)!');
 // Link converted to text, URL removed
 ```
 
-See [Profile Filter Examples](profile-filter-examples.md) for a complete list of how each element type is converted.
-
 ## Link Policies
 
 Control how links are rendered:

docs/guide/syntax.md

@@ -785,7 +785,7 @@ I :heart: Djot
 <p>I <span class="symbol">heart</span> Djot</p>
 ```
 
-Note: Symbol rendering can be customized via events. See the [Cookbook](cookbook.md) for examples.
+Note: Symbol rendering can be customized via events. See the [Cookbook](/cookbook/) for examples.
 
 ### Footnotes
 
@@ -937,7 +937,7 @@ Definitions can span multiple lines if continuation lines are indented:
   designed to be displayed in a web browser
 ```
 
-**Note:** This feature works alongside the inline span approach documented in the [cookbook](cookbook.md#abbreviations). The definition-based approach automatically applies to all matching text, while the inline `[HTML]{abbr="..."}` approach allows overriding specific occurrences.
+**Note:** This feature works alongside the inline span approach documented in the [cookbook](/cookbook/#abbreviations). The definition-based approach automatically applies to all matching text, while the inline `[HTML]{abbr="..."}` approach allows overriding specific occurrences.
 
 ## Escaping
 

docs/guide/why-djot.md

@@ -293,5 +293,5 @@ Djot is the better choice when:
 
 - [Official Djot Syntax Reference](https://djot.net/)
 - [Djot Playground](https://djot.net/playground/)
-- [Syntax Guide](syntax.md) - This library's syntax documentation
-- [Converters](converters.md) - Migration tools
+- [Syntax Guide](./syntax) - This library's syntax documentation
+- [Converters](./converters) - Migration tools

docs/reference/api.md

@@ -28,7 +28,7 @@ public function __construct(
 - `$warnings`: When `true`, collects warnings during parsing (see [Error Handling](#error-handling)).
 - `$strict`: When `true`, throws `ParseException` on parse errors (see [Error Handling](#error-handling)).
 - `$safeMode`: When `true` or a `SafeMode` instance, enables XSS protection (see [Safe Mode](#safe-mode)).
-- `$profile`: A `Profile` instance for feature restriction (see [Profiles](profiles.md)).
+- `$profile`: A `Profile` instance for feature restriction (see [Profiles](/guide/profiles)).
 - `$significantNewlines`: When `true`, enables markdown-like parsing where block elements can interrupt paragraphs (see [Significant Newlines Mode](#significant-newlines-mode)).
 
 ### Factory Methods
@@ -875,4 +875,4 @@ $converter = DjotConverter::withSignificantNewlines();
 $converter->getRenderer()->setSoftBreakMode(SoftBreakMode::Space);
 ```
 
-See [enhancements.md](enhancements.md#significant-newlines-mode) for upstream tracking.
+See [enhancements.md](./enhancements#significant-newlines-mode) for upstream tracking.

docs/reference/architecture.md

@@ -189,7 +189,7 @@ Events are fired for each node type using the pattern `render.{node_type}`:
 - `render.paragraph`, `render.heading`, `render.code_block`, etc.
 - `render.link`, `render.image`, `render.emphasis`, `render.symbol`, etc.
 
-See the [Cookbook](cookbook.md) for common customization recipes.
+See the [Cookbook](/cookbook/) for common customization recipes.
 
 ### Adding New Syntax
 

docs/reference/enhancements.md

@@ -890,7 +890,7 @@ is maintained by the <abbr title="World Wide Web Consortium">W3C</abbr>.</p>
 - Case-sensitive matching (HTML ≠ html)
 - Word-boundary aware (HTML won't match HTMLElement or XHTML)
 - Multi-line definitions supported with indentation
-- Works alongside the inline span approach (`[HTML]{abbr="..."}`) from the [cookbook](cookbook.md#abbreviations)
+- Works alongside the inline span approach (`[HTML]{abbr="..."}`) from the [cookbook](/cookbook/#abbreviations)
 
 **Multi-line definition example:**
 ```djot