fix(ui): avoid duplicate Claude working indicators

[Ehtasham-Yasin]

Summary

Closes #74.

When Termic's opt-in working indicator is visible, Claude's raw leading status glyph is now hidden from the displayed tab title. This avoids showing two separate working indicators for the same state.

Changes

• Added a small title-formatting helper for Claude live terminal titles
• Hide Claude's leading idle/spinner glyph only when Termic's own working badge is actually visible
• Applied the behavior consistently in the sidebar and top tab bar
• Preserved raw titles, custom titles, and behavior when the working indicator is disabled
• Added focused unit tests for idle and Braille spinner title prefixes

Validation

• npm test — 220 tests passed
• npm run build — passed
• git diff --cached --check — passed

[simion]

Thanks! will manually test and verify tonight. Trying to remember what issues i had with this cleanup the last time i implemented it and ended up reverting it.

I think i kept those glyphs for more reliable work done detection. If we do the detection on the original non formatted title, all good.

[simion]

Thanks @Ehtasham-Yasin, this is a clean fix. Verified the raw title is still stored verbatim (setTabLiveTitle) and the working-state detection reads the unmodified title, so the activity indicator is untouched, the formatting is display-only. Tests (220) and build pass. Merging now; it'll ship in the next release. Appreciate the well-scoped PR and the unit tests.