fix: format cost display with 6 decimal precision in log details

[Radheshg04]

Summary

Fixed cost display formatting in the log details sheet to show costs with proper decimal precision and remove trailing zeros.

Changes

• Modified the cost display logic to format costs using parseFloat(log.cost.toFixed(6)) instead of directly displaying the raw cost value
• This ensures costs are displayed with up to 6 decimal places while removing unnecessary trailing zeros

Type of change

• Bug fix
• Feature
• Refactor
• Documentation
• Chore/CI

Affected areas

• Core (Go)
• Transports (HTTP)
• Providers/Integrations
• Plugins
• UI (Next.js)
• Docs

How to test

1. Navigate to the workspace logs section
2. Open a log entry that has cost information
3. Verify that the cost is displayed with proper decimal formatting (no unnecessary trailing zeros)
4. Test with various cost values to ensure formatting works correctly

# UI
cd ui
pnpm i || npm i
pnpm test || npm test
pnpm build || npm run build

Screenshots/Recordings

Before: Cost might display with excessive decimal places or formatting issues
After: Cost displays cleanly with appropriate precision

Breaking changes

• Yes
• No

Related issues

Security considerations

None - this is a display formatting change only.

Checklist

• I read docs/contributing/README.md and followed the guidelines
• I added/updated tests where appropriate
• I updated documentation where needed
• I verified builds succeed (Go and UI)
• I verified the CI pipeline passes locally if applicable

[coderabbitai]

📝 Walkthrough

Summary by CodeRabbit

• Bug Fixes
  • Improved cost value formatting in the Tokens section of log details. Cost amounts now display with precision up to 6 decimal places, with trailing zeros removed for cleaner presentation and better readability.

Walkthrough

A single line in the log details sheet has been modified to format cost values using parseFloat(log.cost.toFixed(6)), which limits the display to 6 decimal places and removes trailing zeros while preserving the dollar sign prefix.

Changes

Cohort / File(s)	Summary
Cost Formatting ui/app/workspace/logs/sheets/logDetailsSheet.tsx	Modified cost value display in Tokens section to parse float with 6 decimal precision, removing trailing zeros while maintaining currency formatting.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

A penny appears, all precise and neat,
Six decimals dancing, a decimal treat! 🐰
No trailing zeros to clutter the view,
Currency cleaner, formatted anew! ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: formatting cost display with 6 decimal precision in log details.
Description check	✅ Passed	The PR description is comprehensive and follows the template well, covering summary, changes, type of change, affected areas, testing instructions, and other required sections.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch 03-12-fix_round_off_cost_to_6_decimals_in_ui

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[Radheshg04]

• fix: format cost display with 6 decimal precision in log details #2037 👈 (View in Graphite)
• feat: refactor model catalog pricing engine with unified cost calculation #1800 : 2 other dependent PRs (#1825 , #2041 )
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

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_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@ui/app/workspace/logs/sheets/logDetailsSheet.tsx`:
- Line 341: The LogEntryDetailsView in logDetailsSheet.tsx currently formats
cost with .toFixed(6) and a manual `$` prefix causing inconsistent precision;
update the cost formatting to use the shared formatCost utility from
ui/app/workspace/dashboard/utils/chartUtils.ts (or change to .toFixed(4) to
match columns.tsx and page.tsx) for consistency, and ensure the `$` prefix is
applied uniformly (fix columns.tsx to include `$` if you choose .toFixed(4)).
Locate the cost usage in LogEntryDetailsView (value={log.cost ...}), the table
in columns.tsx, and the stats card in page.tsx and replace their ad-hoc
formatting with formatCost(log.cost) (or standardize to .toFixed(4) + `$`) so
all views match.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: d3a43f9b-76c4-4acb-a684-488dbbe8d118

📥 Commits

Reviewing files that changed from the base of the PR and between 1e98928 and 58006c9.

📒 Files selected for processing (1)

• ui/app/workspace/logs/sheets/logDetailsSheet.tsx