Add 8h dashboard time range

Author: kmg0308

README.md

@@ -12,7 +12,7 @@ By default, it does not send prompts, code, messages, or token records to any se
 
 - Main macOS dashboard app with Dock and Cmd+Tab support.
 - Dashboard sections: All, Codex, Claude Code.
-- Time ranges: 30 minutes, 1/3/6/12/24 hours, today, yesterday, 7 days, 30 days, 3/6/12 months, and all history.
+- Time ranges: 30 minutes, 1/3/6/8/12/24 hours, today, yesterday, 7 days, 30 days, 3/6/12 months, and all history.
 - Token views: 1/5/10/20/30 minutes, hourly, daily, weekly, and monthly.
 - Breakdowns by app, token kind, model, project, and session.
 - Local parsing for:

Sources/TokenMeter/ChartViews.swift

@@ -721,7 +721,7 @@ struct TokenBarChart: View {
             return "HH:mm"
         case .day:
             switch range {
-            case .today, .yesterday, .last30Minutes, .last1Hour, .last3Hours, .last6Hours, .last12Hours, .last24Hours:
+            case .today, .yesterday, .last30Minutes, .last1Hour, .last3Hours, .last6Hours, .last8Hours, .last12Hours, .last24Hours:
                 return "HH:mm"
             case .last7Days:
                 return "EEE d"

Sources/TokenMeter/DashboardModel.swift

@@ -86,7 +86,7 @@ enum DashboardBucketSelection: Hashable, Identifiable {
             .minute
         case .last3Hours:
             .fiveMinutes
-        case .last6Hours:
+        case .last6Hours, .last8Hours:
             .tenMinutes
         case .last12Hours:
             .twentyMinutes
@@ -717,7 +717,7 @@ final class DashboardModel: ObservableObject {
 
     private func scanWindowStart(for range: TimeRangePreset) -> Date? {
         switch range {
-        case .today, .yesterday, .last30Minutes, .last1Hour, .last3Hours, .last6Hours, .last12Hours, .last24Hours, .last7Days, .last30Days:
+        case .today, .yesterday, .last30Minutes, .last1Hour, .last3Hours, .last6Hours, .last8Hours, .last12Hours, .last24Hours, .last7Days, .last30Days:
             return range.previousInterval().start
         case .last3Months, .last6Months, .last12Months:
             return range.previousInterval().start

Sources/TokenMeter/DashboardView.swift

@@ -16,6 +16,7 @@ struct DashboardView: View {
         .last1Hour,
         .last3Hours,
         .last6Hours,
+        .last8Hours,
         .last12Hours,
         .last24Hours
     ]

Sources/TokenMeterCore/Aggregation.swift

@@ -7,6 +7,7 @@ public enum TimeRangePreset: String, CaseIterable, Identifiable, Sendable {
     case last1Hour = "1h"
     case last3Hours = "3h"
     case last6Hours = "6h"
+    case last8Hours = "8h"
     case last12Hours = "12h"
     case last24Hours = "24h"
     case last7Days = "7d"
@@ -23,6 +24,7 @@ public enum TimeRangePreset: String, CaseIterable, Identifiable, Sendable {
         .last1Hour,
         .last3Hours,
         .last6Hours,
+        .last8Hours,
         .last12Hours,
         .last24Hours,
         .today,
@@ -57,6 +59,8 @@ public enum TimeRangePreset: String, CaseIterable, Identifiable, Sendable {
             return DateInterval(start: now.addingTimeInterval(-3 * 60 * 60), end: now)
         case .last6Hours:
             return DateInterval(start: now.addingTimeInterval(-6 * 60 * 60), end: now)
+        case .last8Hours:
+            return DateInterval(start: now.addingTimeInterval(-8 * 60 * 60), end: now)
         case .last12Hours:
             return DateInterval(start: now.addingTimeInterval(-12 * 60 * 60), end: now)
         case .last24Hours:

Sources/TokenMeterSelfTestSupport/AggregationTests.swift

@@ -182,6 +182,10 @@ extension TokenMeterSelfTest {
         let sixHours = TimeRangePreset.last6Hours.interval(now: now, calendar: calendar)
         try expect(sixHours.start == date(year: 2026, month: 5, day: 11, hour: 11, minute: 37, calendar: calendar), "6h start")
         try expect(sixHours.end == now, "6h end")
+
+        let eightHours = TimeRangePreset.last8Hours.interval(now: now, calendar: calendar)
+        try expect(eightHours.start == date(year: 2026, month: 5, day: 11, hour: 9, minute: 37, calendar: calendar), "8h start")
+        try expect(eightHours.end == now, "8h end")
     }
 
     static func previousRangesMatchCurrentDuration() throws {
@@ -290,6 +294,7 @@ extension TokenMeterSelfTest {
             .last1Hour,
             .last3Hours,
             .last6Hours,
+            .last8Hours,
             .last12Hours,
             .last24Hours,
             .today,