Fix rtl text rendering (#21382)

* Fix Arabic RTL text rendering in web UI

- Add dir='auto' attributes to markdown containers and blocks
- Implement post-processing to add dir='auto' to all text elements
- Replace directional CSS properties with logical properties for proper RTL list alignment
- Ensure bidirectional text support for mixed Arabic/English content

* Clean up commented duplicate function

Remove the commented-out duplicate transformMdastNode function
that was left over from refactoring.

* Fix Arabic RTL text rendering in web UI

- Add dir='auto' attributes to markdown containers and blocks
- Implement post-processing to add dir='auto' to all text elements
- Replace directional CSS properties with logical properties for proper RTL list alignment
- Minor code formatting improvements

This ensures bidirectional text support for mixed Arabic/English content in the llama.cpp web UI.

* Implement rehype plugin for comprehensive RTL text support

- Add rehypeRtlSupport plugin that applies dir='auto' to all elements with children
- Replace DOMParser-based approach with efficient HAST tree processing
- Remove hardcoded element lists for better maintainability
- Ensure proper bidirectional text rendering for mixed RTL/LTR content

* Fix RTL text rendering with rehype plugin and cleanup

* fix: prettier formatting

tools/server/webui/package-lock.json

@@ -51,7 +51,6 @@
 				"eslint-config-prettier": "^10.0.1",
 				"eslint-plugin-storybook": "^10.2.4",
 				"eslint-plugin-svelte": "^3.0.0",
-				"fflate": "^0.8.2",
 				"globals": "^16.0.0",
 				"http-server": "^14.1.1",
 				"mdast": "^3.0.0",
@@ -5051,13 +5050,6 @@
 				}
 			}
 		},
-		"node_modules/fflate": {
-			"version": "0.8.2",
-			"resolved": "https://registry.npmjs.org/fflate/-/fflate-0.8.2.tgz",
-			"integrity": "sha512-cPJU47OaAoCbg0pBvzsgpTPhmhqI5eJjh/JIu8tPj5q+T7iLvW/JAYUqmE7KOB4R1ZyEhzBaIQpQpardBF5z8A==",
-			"dev": true,
-			"license": "MIT"
-		},
 		"node_modules/file-entry-cache": {
 			"version": "8.0.0",
 			"resolved": "https://registry.npmjs.org/file-entry-cache/-/file-entry-cache-8.0.0.tgz",