LB-1969: Add tooltip to Similar Artists header on artist page

[meekhumor]

Problem

Ticket: LB-1969

Currently, the Similar Artists graph on artist pages only shows when there is enough data to generate it. Right now when there is no data, the entire section is hidden. This can be confusing for users browsing lesser known artists, they may not realize the feature exists.

Solution

• Always show the Similar Artists header on artist pages regardless of data availability
• Added a tooltip icon (?) next to the title explaining: "This graph will be displayed when more users have listened to this artist."
• When data is available, the graph renders as before with no tooltip icon

• I have run the code and manually tested the changes

AI usage

• I did not use any AI

Action

No further action needed.

[Aerozol]

Thank you for picking this up!

Looks like a big gap under 'Similar Artists'? Can we make this smaller, when nothing is displayed? (not tested, based off screenshot only)

[meekhumor]

@Aerozol

Does this look fine?

[Aerozol]

If it looks like this then that's still a lot of empty:

[meekhumor]

@Aerozol among these which one will u prefer

[Aerozol]

Thank you @meekhumor! Option 1 please.
(Since the tooltip is only displayed on hover/click we don't have to worry about it covering elements)

[meekhumor]

Alright @Aerozol , I have updated the code accordingly, Thanks!