fix: remove theme dependency and add test page

- Remove theme configuration to use pure custom layout
- Add test page to verify dark theme and sidebar
- Force GitHub Pages to use our custom layout
- Test if sidebar navigation works properly

Author: rainmana

_config.yml

@@ -7,8 +7,7 @@ description: Security-focused LLM memory storage with intelligence gathering, re
 url: "https://rainmana.github.io"
 baseurl: "/tinybrain"
 
-# Custom Theme - No external theme
-# theme: minima
+# No theme - completely custom
 
 # Override theme layout
 layout: default

test-layout.md

@@ -0,0 +1,26 @@
+---
+layout: default
+title: Test Layout
+---
+
+# Test Page
+
+This is a test page to verify our custom dark theme layout is working.
+
+## Features to Test
+
+- Dark background
+- Sidebar navigation
+- Typography
+- Code blocks
+
+```bash
+echo "Testing code block styling"
+```
+
+### Expected Results
+
+- Dark theme should be visible
+- Sidebar should be on the left
+- Text should be properly styled
+- Code blocks should have dark styling