fix: conversation tab state sync across browser tabs

[naaa760]

Summary of PR

• Fixed bug where switching conversation tabs (editor/browser/terminal) in one browser tab would affect all other browser tabs globally. The issue was caused by shared localStorage keys across conversations.

fix: #11607

Changes:

• Made localStorage keys conversation-specific by appending conversation ID (conversation-selected-tab-${conversationId})
• Removed global localStorage initialization from conversation store
• Each conversation now maintains independent tab state per browser tab

Checklist

• [x] I have read and reviewed the code and I understand what the code is doing.
• [x] I have tested the code to the best of my ability and ensured it works as expected.

[mamoodi]

@naaa760 any interest in looking at the feedback here?

[naaa760]

@naaa760 any interest in looking at the feedback here?

I will resolve it in few hours.

[naaa760]

@amanape please review it! sorry for being a little late. thankss

[mamoodi]

amanape will be available next week. I'll get him to take a look. Thank you!