fix: convert [[wikilinks]] to Gitea-compatible markdown links

SCHEMA.md

@@ -8,7 +8,7 @@ and other platforms.
 ## Conventions
 - File names: lowercase, hyphens, no spaces (e.g., `nyxara-waechterin-der-schwelle.md`)
 - Every wiki page starts with YAML frontmatter (see below)
-- Use `[[wikilinks]]` to link between pages (minimum 2 outbound links per page)
+- Use `[display text](relative/path/to/file.md)` standard markdown links to link between pages (minimum 2 outbound links per page)
 - When updating a page, always bump the `updated` date
 - Every new page must be added to `index.md` under the correct section
 - Every action must be appended to `log.md`
@@ -66,7 +66,7 @@ add it here first, then use it. This prevents tag sprawl.
 One page per notable entity (character, realm, artifact, etc.). Include:
 - Overview / description
 - Key facts, traits, backstory
-- Relationships to other entities ([[wikilinks]])
+- Relationships to other entities (standard markdown links)
 - Artwork references and appearances
 - Source references
 
@@ -75,7 +75,7 @@ One page per concept or topic. Include:
 - Definition / explanation
 - Current state of knowledge
 - Open questions or debates
-- Related concepts ([[wikilinks]])
+- Related concepts (standard markdown links)
 
 ## Comparison Pages
 Side-by-side analyses. Include: