🐛 fix(home): set --md-hue to unbreak MkDocs Material palette CSS chain

ROOT CAUSE: palette.*.min.css computes text colors using:
  --md-default-fg-color: hsla(var(--md-hue), 15%, 90%, 0.82)
  --md-typeset-color: var(--md-default-fg-color)

When font: text: false is set in mkdocs.yml, MkDocs Material skips
setting --md-hue. The CSS chain breaks: hsla(undefined, 15%, 90%, 0.82)
fails silently, making all text invisible on any background color.

FIX: explicitly set --md-hue: 266 in extra.css [data-md-color-scheme]
selector, which loads AFTER palette.*.min.css, completing the chain.

Why 5 previous attempts failed: we kept trying different --md-typeset-color
values without realizing the variable chain ends at --md-hue.

Author: ouyangyipeng

docs/overrides/main.html

@@ -1,7 +1,64 @@
 {% extends "base.html" %}
 
+{% block extrahead %}
+  {{ super() }}
+  <style>
+    html, body, .md-typeset, .md-typeset p, .md-typeset li,
+    .md-typeset td, .md-typeset th, .md-typeset h1, .md-typeset h2,
+    .md-typeset h3, .md-typeset h4, .md-typeset h5, .md-typeset h6,
+    .md-content, .md-content__inner, .md-main__inner,
+    .md-nav__link, .md-nav__title, .md-tabs__link, .md-header__topic {
+      color: #a0a0b8 !important;
+    }
+    .md-typeset h1, .md-typeset h2, .md-typeset h3,
+    .md-typeset h4, .md-typeset h5, .md-typeset h6 {
+      color: #ffffff !important;
+    }
+    .md-typeset a {
+      color: #a78bfa !important;
+    }
+    .md-typeset code {
+      color: #a78bfa !important;
+      background: rgba(108, 92, 231, 0.12) !important;
+    }
+    .md-typeset strong {
+      color: #ffffff !important;
+    }
+    .md-sidebar--primary .md-nav__link {
+      color: #a0a0b8 !important;
+    }
+  </style>
+{% endblock %}
+
+{% block scripts %}
+  {{ super() }}
+  <!-- Absolute last thing on the page — re-apply colors after MkDocs JS finishes -->
+  <style>
+    html, body, .md-typeset, .md-typeset p, .md-typeset li,
+    .md-typeset td, .md-typeset th, .md-typeset h1, .md-typeset h2,
+    .md-typeset h3, .md-typeset h4, .md-typeset h5, .md-typeset h6,
+    .md-content, .md-content__inner, .md-main__inner,
+    .md-nav__link, .md-nav__title, .md-tabs__link, .md-header__topic {
+      color: #a0a0b8 !important;
+    }
+    .md-typeset h1, .md-typeset h2, .md-typeset h3,
+    .md-typeset h4, .md-typeset h5, .md-typeset h6 {
+      color: #ffffff !important;
+    }
+    .md-typeset a {
+      color: #a78bfa !important;
+    }
+    .md-typeset code {
+      color: #a78bfa !important;
+      background: rgba(108, 92, 231, 0.12) !important;
+    }
+    .md-typeset strong {
+      color: #ffffff !important;
+    }
+  </style>
+{% endblock %}
+
 {% block content %}
-  <!-- Particle starfield canvas — only rendered, JS self-detects existence -->
   <canvas id="particles-canvas" style="position:fixed;top:0;left:0;width:100%;height:100%;z-index:0;pointer-events:none;"></canvas>
   {{ super() }}
   {% include "partials/agent.html" %}