fix: resolve TypeScript type mismatch in SessionStats component

[github-actions]

Summary

• Fixed TypeScript type error where SessionStats component expected string | null for firstRequestAt/lastRequestAt but received Date | null from the aggregateSessionStats repository function
• Changed the interface to accept Date | string | null which is compatible with both the data source and the existing TimeRow component behavior

Root Cause

The aggregateSessionStats function in src/repository/message.ts returns firstRequestAt: Date | null and lastRequestAt: Date | null, but the SessionStats component's interface expected string | null. The TimeRow helper function already handles both types correctly via new Date(date).

Changes Made

File	Change	Type
session-stats.tsx	Changed firstRequestAt and lastRequestAt types from string | null to Date | string | null	Type fix
session-stats.tsx	Updated TimeRow function parameter type to match	Type fix

Test Plan

• bun run typecheck passes
• No behavior changes - new Date() accepts both Date and string inputs

Related

• Original PR: release v0.3.42 #561
• Failed CI Run: PR Build Check

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Greptile Summary

This PR resolves a TypeScript type mismatch between the database layer and UI component. The aggregateSessionStats function in src/repository/message.ts:289-290 returns firstRequestAt: Date | null and lastRequestAt: Date | null from SQL queries, but the SessionStats component interface was typed as string | null. The fix correctly updates the interface to accept Date | string | null, which is compatible with both the data source and the existing TimeRow component that already handles both types via new Date(date).

Key Changes:

• Updated SessionStatsProps interface to accept Date | string | null for timestamp fields
• Updated TimeRow function parameter type to match the interface
• Minor import reordering (no functional impact)

Verification:

• Type flow confirmed: Database → aggregateSessionStats() → getSessionDetails() → SessionStats component
• TimeRow already handles both Date and string correctly via new Date() constructor
• No runtime behavior changes, purely a type safety fix

Confidence Score: 5/5

• This PR is safe to merge with no risk - it's a straightforward type fix that aligns interface definitions with actual data types
• The type change is minimal, correct, and backward compatible. The TimeRow component's use of new Date(date) handles both Date objects and date strings identically, so there are no runtime behavior changes. The fix resolves the TypeScript compilation error and accurately reflects the actual data flow from database to UI.
• No files require special attention

Important Files Changed

Filename	Overview
src/app/[locale]/dashboard/sessions/[sessionId]/messages/_components/session-stats.tsx	Fixed TypeScript type mismatch by changing firstRequestAt and lastRequestAt from `string

Sequence Diagram

sequenceDiagram
    participant Client as SessionMessagesClient
    participant Action as getSessionDetails()
    participant Repo as aggregateSessionStats()
    participant DB as Database
    participant UI as SessionStats Component

    Client->>Action: getSessionDetails(sessionId)
    Action->>Repo: aggregateSessionStats(sessionId)
    Repo->>DB: SQL Query (min/max createdAt)
    DB-->>Repo: Returns Date | null
    Note over DB,Repo: firstRequestAt: Date | null<br/>lastRequestAt: Date | null
    Repo-->>Action: Stats with Date types
    Action-->>Client: sessionStats data
    Client->>UI: Render with stats prop
    Note over UI: Interface now accepts<br/>Date | string | null
    UI->>UI: TimeRow: new Date(date)
    Note over UI: new Date() handles<br/>both Date and string

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