diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 320bc81..bb23587 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -13,7 +13,6 @@
         "@codemirror/lang-sql": "^6.10.0",
         "@codemirror/language": "^6.12.3",
         "@codemirror/lint": "^6.9.6",
-        "@codemirror/rectangular-selection": "^0.19.2",
         "@codemirror/search": "^6.7.0",
         "@codemirror/state": "^6.6.0",
         "@codemirror/theme-one-dark": "^6.1.3",
@@ -51,7 +50,6 @@
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
         "cmdk": "^1.1.1",
-        "codemirror": "^6.0.2",
         "date-fns": "^4.1.0",
         "echarts": "^6.0.0",
         "embla-carousel-react": "^8.6.0",
@@ -1937,59 +1935,6 @@
         "crelt": "^1.0.5"
       }
     },
-    "node_modules/@codemirror/rangeset": {
-      "version": "0.19.9",
-      "resolved": "https://registry.npmmirror.com/@codemirror/rangeset/-/rangeset-0.19.9.tgz",
-      "integrity": "sha512-V8YUuOvK+ew87Xem+71nKcqu1SXd5QROMRLMS/ljT5/3MCxtgrRie1Cvild0G/Z2f1fpWxzX78V0U4jjXBorBQ==",
-      "deprecated": "As of 0.20.0, this package has been merged into @codemirror/state",
-      "license": "MIT",
-      "dependencies": {
-        "@codemirror/state": "^0.19.0"
-      }
-    },
-    "node_modules/@codemirror/rangeset/node_modules/@codemirror/state": {
-      "version": "0.19.9",
-      "resolved": "https://registry.npmmirror.com/@codemirror/state/-/state-0.19.9.tgz",
-      "integrity": "sha512-psOzDolKTZkx4CgUqhBQ8T8gBc0xN5z4gzed109aF6x7D7umpDRoimacI/O6d9UGuyl4eYuDCZmDFr2Rq7aGOw==",
-      "license": "MIT",
-      "dependencies": {
-        "@codemirror/text": "^0.19.0"
-      }
-    },
-    "node_modules/@codemirror/rectangular-selection": {
-      "version": "0.19.2",
-      "resolved": "https://registry.npmmirror.com/@codemirror/rectangular-selection/-/rectangular-selection-0.19.2.tgz",
-      "integrity": "sha512-AXK/p5eGwFJ9GJcLfntqN4dgY+XiIF7eHfXNQJX5HhQLSped2wJE6WuC1rMEaOlcpOqlb9mrNi/ZdUjSIj9mbA==",
-      "deprecated": "As of 0.20.0, this package has been merged into @codemirror/view",
-      "license": "MIT",
-      "dependencies": {
-        "@codemirror/state": "^0.19.0",
-        "@codemirror/text": "^0.19.4",
-        "@codemirror/view": "^0.19.48"
-      }
-    },
-    "node_modules/@codemirror/rectangular-selection/node_modules/@codemirror/state": {
-      "version": "0.19.9",
-      "resolved": "https://registry.npmmirror.com/@codemirror/state/-/state-0.19.9.tgz",
-      "integrity": "sha512-psOzDolKTZkx4CgUqhBQ8T8gBc0xN5z4gzed109aF6x7D7umpDRoimacI/O6d9UGuyl4eYuDCZmDFr2Rq7aGOw==",
-      "license": "MIT",
-      "dependencies": {
-        "@codemirror/text": "^0.19.0"
-      }
-    },
-    "node_modules/@codemirror/rectangular-selection/node_modules/@codemirror/view": {
-      "version": "0.19.48",
-      "resolved": "https://registry.npmmirror.com/@codemirror/view/-/view-0.19.48.tgz",
-      "integrity": "sha512-0eg7D2Nz4S8/caetCTz61rK0tkHI17V/d15Jy0kLOT8dTLGGNJUponDnW28h2B6bERmPlVHKh8MJIr5OCp1nGw==",
-      "license": "MIT",
-      "dependencies": {
-        "@codemirror/rangeset": "^0.19.5",
-        "@codemirror/state": "^0.19.3",
-        "@codemirror/text": "^0.19.0",
-        "style-mod": "^4.0.0",
-        "w3c-keyname": "^2.2.4"
-      }
-    },
     "node_modules/@codemirror/search": {
       "version": "6.7.0",
       "resolved": "https://registry.npmmirror.com/@codemirror/search/-/search-6.7.0.tgz",
@@ -2010,13 +1955,6 @@
         "@marijn/find-cluster-break": "^1.0.0"
       }
     },
-    "node_modules/@codemirror/text": {
-      "version": "0.19.6",
-      "resolved": "https://registry.npmmirror.com/@codemirror/text/-/text-0.19.6.tgz",
-      "integrity": "sha512-T9jnREMIygx+TPC1bOuepz18maGq/92q2a+n4qTqObKwvNMg+8cMTslb8yxeEDEq7S3kpgGWxgO1UWbQRij0dA==",
-      "deprecated": "As of 0.20.0, this package has been merged into @codemirror/state",
-      "license": "MIT"
-    },
     "node_modules/@codemirror/theme-one-dark": {
       "version": "6.1.3",
       "resolved": "https://registry.npmmirror.com/@codemirror/theme-one-dark/-/theme-one-dark-6.1.3.tgz",
@@ -5763,21 +5701,6 @@
         "react-dom": "^18 || ^19 || ^19.0.0-rc"
       }
     },
-    "node_modules/codemirror": {
-      "version": "6.0.2",
-      "resolved": "https://registry.npmmirror.com/codemirror/-/codemirror-6.0.2.tgz",
-      "integrity": "sha512-VhydHotNW5w1UGK0Qj96BwSk/Zqbp9WbnyK2W/eVMv4QyF41INRGpjUhFJY7/uDNuudSc33a/PKr4iDqRduvHw==",
-      "license": "MIT",
-      "dependencies": {
-        "@codemirror/autocomplete": "^6.0.0",
-        "@codemirror/commands": "^6.0.0",
-        "@codemirror/language": "^6.0.0",
-        "@codemirror/lint": "^6.0.0",
-        "@codemirror/search": "^6.0.0",
-        "@codemirror/state": "^6.0.0",
-        "@codemirror/view": "^6.0.0"
-      }
-    },
     "node_modules/color-convert": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
diff --git a/frontend/package.json b/frontend/package.json
index cfa5649..e741a51 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -15,7 +15,6 @@
     "@codemirror/lang-sql": "^6.10.0",
     "@codemirror/language": "^6.12.3",
     "@codemirror/lint": "^6.9.6",
-    "@codemirror/rectangular-selection": "^0.19.2",
     "@codemirror/search": "^6.7.0",
     "@codemirror/state": "^6.6.0",
     "@codemirror/theme-one-dark": "^6.1.3",
@@ -53,7 +52,6 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "cmdk": "^1.1.1",
-    "codemirror": "^6.0.2",
     "date-fns": "^4.1.0",
     "echarts": "^6.0.0",
     "embla-carousel-react": "^8.6.0",
diff --git a/frontend/src/components/SqlEditor.tsx b/frontend/src/components/SqlEditor.tsx
index 9a271c8..b7eab5b 100644
--- a/frontend/src/components/SqlEditor.tsx
+++ b/frontend/src/components/SqlEditor.tsx
@@ -13,7 +13,7 @@ import {
 } from '@codemirror/language';
 import { closeBrackets, closeBracketsKeymap } from '@codemirror/autocomplete';
 import { searchKeymap, highlightSelectionMatches } from '@codemirror/search';
-import { rectangularSelection } from '@codemirror/rectangular-selection';
+
 
 // ---------------------------------------------------------------------------
 // Types
@@ -296,7 +296,6 @@ const SqlEditor: React.FC<SqlEditorProps> = ({
         bracketMatching(),
         closeBrackets(),
         highlightSelectionMatches(),
-        rectangularSelection(),
         syntaxHighlighting(defaultHighlightStyle, { fallback: true }),
         appTheme,
         oneDark,