Add Znakopis feature with document and sentence management

- Implemented Znakopis page with document and sentence CRUD operations
- Added backend routes for documents and sentences
- Created UI components for sentence editing and display
- Added sentence store for state management
- Integrated select component for document selection
- Updated README with Phase 3 completion status
- Removed obsolete fix-colors.md file

pnpm-lock.yaml

@@ -117,6 +117,9 @@ importers:
       '@dnd-kit/sortable':
         specifier: ^8.0.0
         version: 8.0.0(@dnd-kit/core@6.3.1(react-dom@18.3.1(react@18.3.1))(react@18.3.1))(react@18.3.1)
+      '@dnd-kit/utilities':
+        specifier: ^3.2.2
+        version: 3.2.2(react@18.3.1)
       '@radix-ui/react-dialog':
         specifier: ^1.0.5
         version: 1.1.15(@types/react-dom@18.3.7(@types/react@18.3.27))(@types/react@18.3.27)(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
@@ -159,6 +162,9 @@ importers:
       react-router-dom:
         specifier: ^6.21.1
         version: 6.30.3(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      sonner:
+        specifier: ^2.0.7
+        version: 2.0.7(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
       tailwind-merge:
         specifier: ^2.2.0
         version: 2.6.0
@@ -2702,6 +2708,12 @@ packages:
     resolution: {integrity: sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==}
     engines: {node: '>=8'}
 
+  sonner@2.0.7:
+    resolution: {integrity: sha512-W6ZN4p58k8aDKA4XPcx2hpIQXBRAgyiWVkYhT7CvK6D3iAu7xjvVyhQHg2/iaKJZ1XVJ4r7XuwGL+WGEK37i9w==}
+    peerDependencies:
+      react: ^18.0.0 || ^19.0.0 || ^19.0.0-rc
+      react-dom: ^18.0.0 || ^19.0.0 || ^19.0.0-rc
+
   source-map-js@1.2.1:
     resolution: {integrity: sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA==}
     engines: {node: '>=0.10.0'}
@@ -5438,6 +5450,11 @@ snapshots:
 
   slash@3.0.0: {}
 
+  sonner@2.0.7(react-dom@18.3.1(react@18.3.1))(react@18.3.1):
+    dependencies:
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
+
   source-map-js@1.2.1: {}
 
   spawn-command@0.0.2: {}