feat: add column sort, SQL formatter, table stats, insert dialog, saved queries & sessions monitor

- Column sort by header click in table view (ASC/DESC/none cycle, server-side)
- SQL formatter with Format button and Shift+Alt+F keybinding (sql-formatter)
- Table size and row count display in schema tree via pg_class
- Insert row dialog with column type hints and auto-skip for identity columns
- Saved queries (bookmarks) with CRUD backend, sidebar panel, and save dialog
- Active sessions monitor (pg_stat_activity) with auto-refresh, cancel & terminate

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package-lock.json

@@ -26,6 +26,7 @@
         "react-dom": "^19.2.0",
         "react-resizable-panels": "^4.6.2",
         "sonner": "^2.0.7",
+        "sql-formatter": "^15.7.0",
         "tailwind-merge": "^3.4.0",
         "zustand": "^5.0.11"
       },
@@ -5023,7 +5024,6 @@
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
       "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==",
-      "dev": true,
       "license": "Python-2.0"
     },
     "node_modules/aria-hidden": {
@@ -5746,6 +5746,12 @@
         "node": ">=0.3.1"
       }
     },
+    "node_modules/discontinuous-range": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/discontinuous-range/-/discontinuous-range-1.0.0.tgz",
+      "integrity": "sha512-c68LpLbO+7kP/b1Hr1qs8/BJ09F5khZGTxqxZuhzxpmwJKOgRFHJWIb9/KmqnqHhLdO55aOxFH/EGBvUQbL/RQ==",
+      "license": "MIT"
+    },
     "node_modules/dotenv": {
       "version": "17.2.4",
       "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-17.2.4.tgz",
@@ -7832,6 +7838,12 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/moo": {
+      "version": "0.5.2",
+      "resolved": "https://registry.npmjs.org/moo/-/moo-0.5.2.tgz",
+      "integrity": "sha512-iSAJLHYKnX41mKcJKjqvnAN9sf0LMDTXDEvFv+ffuRR9a1MIuXLjMNL6EsnDHSkKLTWNqQQ5uo61P4EbU4NU+Q==",
+      "license": "BSD-3-Clause"
+    },
     "node_modules/ms": {
       "version": "2.1.3",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
@@ -7934,6 +7946,34 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/nearley": {
+      "version": "2.20.1",
+      "resolved": "https://registry.npmjs.org/nearley/-/nearley-2.20.1.tgz",
+      "integrity": "sha512-+Mc8UaAebFzgV+KpI5n7DasuuQCHA89dmwm7JXw3TV43ukfNQ9DnBH3Mdb2g/I4Fdxc26pwimBWvjIw0UAILSQ==",
+      "license": "MIT",
+      "dependencies": {
+        "commander": "^2.19.0",
+        "moo": "^0.5.0",
+        "railroad-diagrams": "^1.0.0",
+        "randexp": "0.4.6"
+      },
+      "bin": {
+        "nearley-railroad": "bin/nearley-railroad.js",
+        "nearley-test": "bin/nearley-test.js",
+        "nearley-unparse": "bin/nearley-unparse.js",
+        "nearleyc": "bin/nearleyc.js"
+      },
+      "funding": {
+        "type": "individual",
+        "url": "https://nearley.js.org/#give-to-nearley"
+      }
+    },
+    "node_modules/nearley/node_modules/commander": {
+      "version": "2.20.3",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
+      "integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==",
+      "license": "MIT"
+    },
     "node_modules/negotiator": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-1.0.0.tgz",
@@ -8588,6 +8628,25 @@
         }
       }
     },
+    "node_modules/railroad-diagrams": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/railroad-diagrams/-/railroad-diagrams-1.0.0.tgz",
+      "integrity": "sha512-cz93DjNeLY0idrCNOH6PviZGRN9GJhsdm9hpn1YCS879fj4W+x5IFJhhkRZcwVgMmFF7R82UA/7Oh+R8lLZg6A==",
+      "license": "CC0-1.0"
+    },
+    "node_modules/randexp": {
+      "version": "0.4.6",
+      "resolved": "https://registry.npmjs.org/randexp/-/randexp-0.4.6.tgz",
+      "integrity": "sha512-80WNmd9DA0tmZrw9qQa62GPPWfuXJknrmVmLcxvq4uZBdYqb1wYoKTmnlGUchvVWe0XiLupYkBoXVOxz3C8DYQ==",
+      "license": "MIT",
+      "dependencies": {
+        "discontinuous-range": "1.0.0",
+        "ret": "~0.1.10"
+      },
+      "engines": {
+        "node": ">=0.12"
+      }
+    },
     "node_modules/range-parser": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
@@ -8790,6 +8849,15 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/ret": {
+      "version": "0.1.15",
+      "resolved": "https://registry.npmjs.org/ret/-/ret-0.1.15.tgz",
+      "integrity": "sha512-TTlYpa+OL+vMMNG24xSlQGEJ3B/RzEfUlLct7b5G/ytav+wPrplCpVMFuwzXbkecJrb6IYo1iFb0S9v37754mg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.12"
+      }
+    },
     "node_modules/rettime": {
       "version": "0.10.1",
       "resolved": "https://registry.npmjs.org/rettime/-/rettime-0.10.1.tgz",
@@ -9201,6 +9269,19 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/sql-formatter": {
+      "version": "15.7.0",
+      "resolved": "https://registry.npmjs.org/sql-formatter/-/sql-formatter-15.7.0.tgz",
+      "integrity": "sha512-o2yiy7fYXK1HvzA8P6wwj8QSuwG3e/XcpWht/jIxkQX99c0SVPw0OXdLSV9fHASPiYB09HLA0uq8hokGydi/QA==",
+      "license": "MIT",
+      "dependencies": {
+        "argparse": "^2.0.1",
+        "nearley": "^2.20.1"
+      },
+      "bin": {
+        "sql-formatter": "bin/sql-formatter-cli.cjs"
+      }
+    },
     "node_modules/statuses": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.2.tgz",