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/src/lib/stores/chat.svelte.ts

@@ -1596,7 +1596,7 @@ class ChatStore {
 			conversationsStore.updateMessageAtIndex(messageIndex, { content: newContent });
 			await DatabaseService.updateMessage(messageId, { content: newContent });
 			if (isFirstUserMessage && newContent.trim())
-				await conversationsStore.updateConversationTitleWithConfirmation(
+				await conversationsStore.updateConversationName(
 					activeConv.id,
 					generateConversationTitle(newContent, Boolean(config().titleGenerationUseFirstLine))
 				);
@@ -2113,7 +2113,7 @@ class ChatStore {
 			const rootMessage = allMessages.find((m) => m.type === 'root' && m.parent === null);
 
 			if (rootMessage && msg.parent === rootMessage.id && newContent.trim()) {
-				await conversationsStore.updateConversationTitleWithConfirmation(
+				await conversationsStore.updateConversationName(
 					activeConv.id,
 					generateConversationTitle(newContent, Boolean(config().titleGenerationUseFirstLine))
 				);
@@ -2187,7 +2187,7 @@ class ChatStore {
 
 			conversationsStore.updateConversationTimestamp();
 			if (isFirstUserMessage && newContent.trim())
-				await conversationsStore.updateConversationTitleWithConfirmation(
+				await conversationsStore.updateConversationName(
 					activeConv.id,
 					generateConversationTitle(newContent, Boolean(config().titleGenerationUseFirstLine))
 				);