Improve docs UI and Mermaid rendering (#125)

Refactor documentation for clarity and organization. Upgrade the
@biomejs/biome dependency to version 2.4.9. Clean up imports and improve
component structure in the documentation pages.

## Summary by Sourcery

Refine documentation rendering and UI components while updating tooling
dependencies.

New Features:
- Improve Mermaid diagram rendering in docs with explicit SVG rendering
and stricter security configuration.

Bug Fixes:
- Use stable keys for mapped feature and FAQ items on the docs home page
to avoid React key issues.
- Adjust field error list keys to avoid collisions and improve React
reconciliation.

Enhancements:
- Clean up and reorder exports, imports, and hook dependencies across UI
components for consistency and maintainability.
- Streamline docs routing and loader types by removing unused parameters
and simplifying language handling.
- Improve user-facing error and status messages with template literals
and clearer formatting.

Build:
- Upgrade @biomejs/biome to version 2.4.9 and consolidate Biome
configuration by removing redundant docs-specific settings.

Documentation:
- Tidy documentation page composition and table-of-contents handling for
clearer structure.

1 files changed, 1 insertions, 1 deletions

diff --git a/package.json b/package.json
index c91e0d4..07ed537 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "toml": "^3.0.0"
   },
   "devDependencies": {
-    "@biomejs/biome": "^2.4.5",
+    "@biomejs/biome": "^2.4.9",
     "@j178/prek": "^0.2.29",
     "@tauri-apps/cli": "^2.9.6",
     "@types/node": "^24.10.9",