feat: add linear graph view with ideal usage pace indicator

[yenpvn]

Summary

Add configurable graph display modes (circular/linear) with pace guidance to help users optimize their Claude usage rate and stay within session limits.

Changes

• Add new GraphDisplayType enum with circular and linear options for usage graph display
• Add graphDisplayType setting to UserSettings with persistence support
• Add localization strings for graph type options in all supported languages (EN, JA, KO, ZH-Hans, ZH-Hant)

Test plan

• Verify the setting persists across app restarts
• Verify localized strings display correctly in all supported languages
• Verify reset to defaults sets graph type to circular
• Verify the graph display correctly during all the sessions

[ArthurD]

+1, this would be useful to me!

Having it be optional is great for users who aren't pushing the limits of their plan and/or who don't want the extra info.

I also quite like the UI choice -- it's a clean display that adds quite a bit of new useful info (pace/trajectory plus current actual % value), and does so without adding clutter or ambiguity.

I'd definitely really like to see this merged!

[f-is-h]

Hi, thanks for working on this! The linear graph idea is interesting.

A few things to clean up:

1. The .serena/ directory and its contents shouldn't be included. That looks like local tooling config.

2. The .gitignore changes (adding .claude and CLAUDE.md) should be reverted. Those are unrelated to this feature.

3. Please don't modify the signing config (CODE_SIGN_STYLE, CODE_SIGN_IDENTITY) in project.pbxproj.

4. The graph component and settings are added, but I don't see where the linear view is actually wired into UsageDetailView. Could you add the UI integration so users can switch between circular and linear?

Also, since it's been a while, you may need to rebase onto the latest main to resolve any conflicts.

Thanks!

[quangyendn]

Hi @f-is-h
Apologies for the long period of inactivity.
Given the complexity of updating this PR, I’ve opened #39 instead, which will replace this one — it also cleans up unnecessary .serena/ configuration files and fork-specific .gitignore entries.

Thanks!