ui: Sidebar Conversations Bulk Action + Improved Settings logic/UI (#25815)

* feat: WIP

* feat: Replace conversation rename flow with unified AlertDialog component

* feat: Add radio group component and consolidate title generation settings

* refactor: Remove JS Sandbox global toggle and migrate legacy user state

* chore: Formatting

* refactor: Cleanup

Co-authored-by: Aleksander Grygier <aleksander.grygier@gmail.com>

* refactor: Cleanup

* refactor: Marquee selection hook

* feat: UI improvements

* refactor: Bulk db operations

* fix: optimize bulk conversation deletion to handle ancestor chains

* refactor: remove pairedKey mechanism from settings system

* fix: remove redundant onclick handler from dialog cancel button

* chore: pin @lucide/svelte to exact version

* feat: Run JavaScript tool disabled by default

* fix: correct active conversation deletion tracking in bulk delete

* feat: improve shift-key multi-selection support in sidebar via keyboard

* refactor: Retrieve JS Tool enabling via Developer Settings

* nits: sync, dialog wording, cycle guard, and lockfile follow-ups

- Restore titleGenerationUseLLM registry entry so it syncs across devices again
- Mention fork cascade in the bulk delete confirmation dialog
- Clear newParent on cycle guard break so children never point at a deleted conversation
- Align @lucide/svelte in package-lock.json with the exact pin in package.json

---------

Co-authored-by: Pascal <admin@serveurperso.com>

tools/ui/package-lock.json

@@ -12,7 +12,7 @@
 				"@eslint/compat": "1.4.1",
 				"@eslint/js": "9.39.2",
 				"@internationalized/date": "3.12.2",
-				"@lucide/svelte": "0.515.0",
+				"@lucide/svelte": "1.25.0",
 				"@modelcontextprotocol/sdk": "1.26.0",
 				"@playwright/test": "1.56.1",
 				"@storybook/addon-a11y": "10.2.4",
@@ -3065,9 +3065,9 @@
 			}
 		},
 		"node_modules/@lucide/svelte": {
-			"version": "0.515.0",
-			"resolved": "https://registry.npmjs.org/@lucide/svelte/-/svelte-0.515.0.tgz",
-			"integrity": "sha512-CEAyqcZmNBfYzVgaRmK2RFJP5tnbXxekRyDk0XX/eZQRfsJmkDvmQwXNX8C869BgNeryzmrRyjHhUL6g9ZOHNA==",
+			"version": "1.25.0",
+			"resolved": "https://registry.npmjs.org/@lucide/svelte/-/svelte-1.25.0.tgz",
+			"integrity": "sha512-v9m+dD68jxVnqkU3K59mG/RSRFlPGzmKCGSyMfnXcaGv9jODDQMyQkcp1CGvk3Y/cUj9v7f8rw1n//K0B53xGQ==",
 			"dev": true,
 			"license": "ISC",
 			"peerDependencies": {