feat: add Pomodoro session celebration with trophy animation

ios/ChronoMindTests/CascadeTests.swift

@@ -52,7 +52,7 @@ final class CascadeTests: XCTestCase {
 
     func testWarningsInPastAreFired() {
         let now = Date()
-        let targetTime = now.addingTimeInterval(600) // 10 min from now
+        let targetTime = now.addingTimeInterval(1800) // 30 min from now
         let intervals = [120, 60, 15, 5] // 2h and 1h are in the past
 
         let warnings = calculateCascadeWarnings(targetTime: targetTime, intervals: intervals, now: now)
@@ -60,8 +60,8 @@ final class CascadeTests: XCTestCase {
         // 120min and 60min warnings should be marked as fired (they're in the past)
         let fired = warnings.filter(\.fired)
         XCTAssertEqual(fired.count, 2)
-        XCTAssertTrue(warnings[0].fired) // 120m
+        XCTAssertTrue(warnings[0].fired) // 120m — in the past
-        XCTAssertTrue(warnings[1].fired) // 60m
+        XCTAssertTrue(warnings[1].fired) // 60m — in the past
         XCTAssertFalse(warnings[2].fired) // 15m — still in the future
         XCTAssertFalse(warnings[3].fired) // 5m — still in the future
     }
@@ -96,7 +96,7 @@ final class CascadeTests: XCTestCase {
 
     func testGetNextWarning() {
         let now = Date()
-        let targetTime = now.addingTimeInterval(3600)
+        let targetTime = now.addingTimeInterval(7200) // 2h from now
         let warnings = calculateCascadeWarnings(
             targetTime: targetTime,
             intervals: [60, 30, 15, 5],
@@ -105,6 +105,7 @@ final class CascadeTests: XCTestCase {
 
         let next = getNextWarning(warnings)
         XCTAssertNotNil(next)
+        // All warnings are in the future (earliest at targetTime - 60m = 1h from now)
         XCTAssertEqual(next?.minutesBefore, 60)
     }
 
@@ -127,19 +128,24 @@ final class CascadeTests: XCTestCase {
 
     func testCheckWarnings() {
         let now = Date()
-        let targetTime = now.addingTimeInterval(3600)
+        let targetTime = now.addingTimeInterval(7200) // 2h from now
         var warnings = calculateCascadeWarnings(
             targetTime: targetTime,
             intervals: [60, 30, 15, 5],
             now: now
         )
 
-        // Check at a time when 60m warning should fire (targetTime - 60min = now)
+        // All warnings should be unfired initially
-        let checkTime = targetTime.addingTimeInterval(-3600) // exactly at 60m warning
+        XCTAssertTrue(warnings.allSatisfy { !$0.fired })
-        let fired = checkWarnings(&warnings, now: checkTime.addingTimeInterval(1)) // 1 second after
+
+        // Check at a time when 60m warning should fire (targetTime - 60min)
+        let checkTime = targetTime.addingTimeInterval(-3599) // 1 second after 60m mark
+        let fired = checkWarnings(&warnings, now: checkTime)
 
         // The 60m warning should fire
-        XCTAssertTrue(fired.count >= 1)
+        XCTAssertEqual(fired.count, 1)
+        XCTAssertTrue(warnings[0].fired) // 60m warning fired
+        XCTAssertFalse(warnings[1].fired) // 30m warning not yet
     }
 
     func testCheckWarningsNoneFire() {

web/src/components/PomodoroView.tsx

@@ -5,7 +5,8 @@ import { getRemainingMs } from '@/lib/timer-engine';
 import type { Timer } from '@/lib/timer-engine';
 import { CountdownRing } from './CountdownRing';
 import { formatDuration } from '@/lib/format';
-import { Coffee, Pause, Play, X, SkipForward } from 'lucide-react';
+import { Coffee, Pause, Play, X, SkipForward, Trophy } from 'lucide-react';
+import { showToast } from './Toast';
 
 interface PomodoroViewProps {
   timer: Timer;
@@ -26,12 +27,62 @@ export function PomodoroView({ timer }: PomodoroViewProps) {
   const isBreak = pomState.isBreak || pomState.isLongBreak;
   const isPaused = timer.state === 'paused';
   const isFiring = timer.state === 'firing';
+  const isCompleted = timer.state === 'completed';
   const roundLabel = isBreak
     ? pomState.isLongBreak ? 'Long Break' : 'Break'
     : `Round ${pomState.currentRound} of ${config.rounds}`;
 
   const ringColor = isBreak ? 'var(--cm-accent-secondary)' : 'var(--cm-accent)';
 
+  // Session complete celebration
+  if (isCompleted) {
+    const totalMinutes = config.workMinutes * config.rounds + config.breakMinutes * (config.rounds - 1) + config.longBreakMinutes;
+    return (
+      <div
+        className="rounded-2xl border p-8 text-center"
+        style={{
+          backgroundColor: 'var(--cm-surface-card)',
+          borderColor: 'var(--cm-border)',
+          background: 'linear-gradient(135deg, var(--cm-surface-card) 0%, rgba(52,211,153,0.08) 100%)',
+        }}
+      >
+        <div className="flex justify-center mb-4">
+          <div
+            className="w-16 h-16 rounded-full flex items-center justify-center"
+            style={{ backgroundColor: 'rgba(52,211,153,0.15)' }}
+          >
+            <Trophy size={32} style={{ color: 'var(--cm-success)' }} />
+          </div>
+        </div>
+        <h3 className="text-xl font-bold mb-2" style={{ color: 'var(--cm-success)' }}>
+          Session Complete!
+        </h3>
+        <p className="text-sm mb-1" style={{ color: 'var(--cm-text-primary)' }}>
+          {timer.label}
+        </p>
+        <p className="text-xs mb-4" style={{ color: 'var(--cm-text-tertiary)' }}>
+          {config.rounds} rounds &middot; ~{totalMinutes} minutes of focused work
+        </p>
+        <div className="flex justify-center gap-1.5 mb-4">
+          {Array.from({ length: config.rounds }).map((_, i) => (
+            <div
+              key={i}
+              className="w-3 h-3 rounded-full"
+              style={{ backgroundColor: 'var(--cm-success)' }}
+            />
+          ))}
+        </div>
+        <button
+          onClick={() => dismiss(timer.id)}
+          className="px-6 py-2.5 rounded-xl text-sm font-medium cursor-pointer"
+          style={{ backgroundColor: 'var(--cm-surface-muted)', color: 'var(--cm-text-secondary)' }}
+        >
+          Close
+        </button>
+      </div>
+    );
+  }
+
   return (
     <div
       className="rounded-2xl border p-6 text-center"