feat(practice): add browse mode navigation and improve SpeedMeter timing display

Browse Mode:
- Add SessionProgressIndicator with collapsible sections for practice/browse modes
- Add BrowseModeView for reviewing problems during practice
- Navigation via clicking progress indicator slots in browse mode
- "Practice This Problem" button to exit browse mode at current problem
- Collapse non-current sections in practice mode (shows ✓count or problem count)

SpeedMeter:
- Add actual time labels (0s, ~Xs avg, Xs pause) positioned under markers
- Extend scale to 120% of threshold so threshold marker isn't always at edge
- Kid-friendly time formatting (8s, 30s, 2m)
- Label overlap detection - combines labels when mean is close to threshold
- Remove unused averageLabel/fastLabel/slowLabel props

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

apps/web/src/app/practice/[studentId]/PracticeClient.tsx

@@ -40,6 +40,10 @@ export function PracticeClient({ studentId, player, initialSession }: PracticeCl
   const [isPaused, setIsPaused] = useState(false)
   // Track timing data from ActiveSession for the sub-nav HUD
   const [timingData, setTimingData] = useState<AttemptTimingData | null>(null)
+  // Browse mode state - lifted here so PracticeSubNav can trigger it
+  const [isBrowseMode, setIsBrowseMode] = useState(false)
+  // Browse index - lifted for navigation from SessionProgressIndicator
+  const [browseIndex, setBrowseIndex] = useState(0)
 
   // Session plan mutations
   const recordResult = useRecordSlotResult()
@@ -116,12 +120,15 @@ export function PracticeClient({ studentId, player, initialSession }: PracticeCl
   const sessionHud: SessionHudData | undefined = currentPart
     ? {
         isPaused,
+        parts: currentPlan.parts,
+        currentPartIndex: currentPlan.currentPartIndex,
         currentPart: {
           type: currentPart.type,
           partNumber: currentPart.partNumber,
           totalSlots: currentPart.slots.length,
         },
         currentSlotIndex: currentPlan.currentSlotIndex,
+        results: currentPlan.results,
         completedProblems,
         totalProblems,
         sessionHealth: sessionHealth
@@ -142,6 +149,9 @@ export function PracticeClient({ studentId, player, initialSession }: PracticeCl
         onPause: handlePause,
         onResume: handleResume,
         onEndEarly: () => handleEndEarly('Session ended'),
+        isBrowseMode,
+        onToggleBrowse: () => setIsBrowseMode((prev) => !prev),
+        onBrowseNavigate: setBrowseIndex,
       }
     : undefined
 
@@ -166,7 +176,10 @@ export function PracticeClient({ studentId, player, initialSession }: PracticeCl
             onResume={handleResume}
             onComplete={handleSessionComplete}
             onTimingUpdate={setTimingData}
-            hideHud={true}
+            isBrowseMode={isBrowseMode}
+            browseIndex={browseIndex}
+            onBrowseIndexChange={setBrowseIndex}
+            onExitBrowse={() => setIsBrowseMode(false)}
           />
         </PracticeErrorBoundary>
       </main>

apps/web/src/components/practice/ActiveSession.tsx

@@ -13,7 +13,10 @@ import type {
   SlotResult,
 } from '@/db/schema/session-plans'
 
-import { SessionPausedModal, type AutoPauseStats, type PauseInfo } from './SessionPausedModal'
+import { css } from '../../../styled-system/css'
+import { type AutoPauseStats, calculateAutoPauseInfo, type PauseInfo } from './autoPauseCalculator'
+import { BrowseModeView, getLinearIndex } from './BrowseModeView'
+import { SessionPausedModal } from './SessionPausedModal'
 
 // Re-export types for consumers
 export type { AutoPauseStats, PauseInfo }
@@ -27,73 +30,6 @@ export interface StudentInfo {
   color: string
 }
 
-// ============================================================================
-// Auto-pause threshold calculation
-// ============================================================================
-
-const DEFAULT_PAUSE_TIMEOUT_MS = 5 * 60 * 1000 // 5 minutes default
-const MIN_SAMPLES_FOR_STATISTICS = 5 // Minimum problems needed for statistical calculation
-
-/**
- * Calculate mean and standard deviation of response times
- */
-function calculateResponseTimeStats(results: SlotResult[]): {
-  mean: number
-  stdDev: number
-  count: number
-} {
-  if (results.length === 0) {
-    return { mean: 0, stdDev: 0, count: 0 }
-  }
-
-  const times = results.map((r) => r.responseTimeMs)
-  const count = times.length
-  const mean = times.reduce((sum, t) => sum + t, 0) / count
-
-  if (count < 2) {
-    return { mean, stdDev: 0, count }
-  }
-
-  const squaredDiffs = times.map((t) => (t - mean) ** 2)
-  const variance = squaredDiffs.reduce((sum, d) => sum + d, 0) / (count - 1) // Sample std dev
-  const stdDev = Math.sqrt(variance)
-
-  return { mean, stdDev, count }
-}
-
-/**
- * Calculate the auto-pause threshold and full stats for display.
- */
-function calculateAutoPauseInfo(results: SlotResult[]): {
-  threshold: number
-  stats: AutoPauseStats
-} {
-  const { mean, stdDev, count } = calculateResponseTimeStats(results)
-  const usedStatistics = count >= MIN_SAMPLES_FOR_STATISTICS
-
-  let threshold: number
-  if (usedStatistics) {
-    // Use mean + 2 standard deviations
-    threshold = mean + 2 * stdDev
-    // Clamp between 30 seconds and 5 minutes
-    threshold = Math.max(30_000, Math.min(threshold, DEFAULT_PAUSE_TIMEOUT_MS))
-  } else {
-    threshold = DEFAULT_PAUSE_TIMEOUT_MS
-  }
-
-  return {
-    threshold,
-    stats: {
-      meanMs: mean,
-      stdDevMs: stdDev,
-      thresholdMs: threshold,
-      sampleCount: count,
-      usedStatistics,
-    },
-  }
-}
-
-import { css } from '../../../styled-system/css'
 import { AbacusDock } from '../AbacusDock'
 import { DecompositionProvider, DecompositionSection } from '../decomposition'
 import { Tooltip, TooltipProvider } from '../ui/Tooltip'
@@ -130,38 +66,16 @@ interface ActiveSessionProps {
   onResume?: () => void
   /** Called when session completes */
   onComplete: () => void
-  /** Hide the built-in HUD (when using external HUD in PracticeSubNav) */
-  hideHud?: boolean
   /** Called with timing data when it changes (for external timing display) */
   onTimingUpdate?: (timing: AttemptTimingData | null) => void
-}
+  /** Whether browse mode is active (controlled externally via toggle in PracticeSubNav) */
-
+  isBrowseMode?: boolean
-/**
+  /** Controlled browse index (linear problem index) */
- * Get the part type description for display
+  browseIndex?: number
- */
+  /** Called when browse index changes (for external navigation from progress indicator) */
-function getPartTypeLabel(type: SessionPart['type']): string {
+  onBrowseIndexChange?: (index: number) => void
-  switch (type) {
+  /** Called when user wants to exit browse mode and return to practice */
-    case 'abacus':
+  onExitBrowse?: () => void
-      return 'Use Abacus'
-    case 'visualization':
-      return 'Mental Math (Visualization)'
-    case 'linear':
-      return 'Mental Math (Linear)'
-  }
-}
-
-/**
- * Get part type emoji
- */
-function getPartTypeEmoji(type: SessionPart['type']): string {
-  switch (type) {
-    case 'abacus':
-      return '🧮'
-    case 'visualization':
-      return '🧠'
-    case 'linear':
-      return '💭'
-  }
 }
 
 /**
@@ -590,8 +504,11 @@ export function ActiveSession({
   onPause,
   onResume,
   onComplete,
-  hideHud = false,
   onTimingUpdate,
+  isBrowseMode: isBrowseModeProp = false,
+  browseIndex: browseIndexProp,
+  onBrowseIndexChange,
+  onExitBrowse,
 }: ActiveSessionProps) {
   const { resolvedTheme } = useTheme()
   const isDark = resolvedTheme === 'dark'
@@ -679,6 +596,42 @@ export function ActiveSession({
   // Track pause info for displaying in the modal (single source of truth)
   const [pauseInfo, setPauseInfo] = useState<PauseInfo | undefined>(undefined)
 
+  // Browse mode state - isBrowseMode is controlled via props
+  // browseIndex can be controlled (browseIndexProp + onBrowseIndexChange) or internal
+  const [internalBrowseIndex, setInternalBrowseIndex] = useState(0)
+
+  // Determine if browse index is controlled
+  const isControlledBrowseIndex = browseIndexProp !== undefined
+  const browseIndex = isControlledBrowseIndex ? browseIndexProp : internalBrowseIndex
+
+  // Unified setter that handles both controlled and uncontrolled modes
+  const setBrowseIndex = useCallback(
+    (index: number | ((prev: number) => number)) => {
+      const newIndex = typeof index === 'function' ? index(browseIndex) : index
+      if (isControlledBrowseIndex) {
+        onBrowseIndexChange?.(newIndex)
+      } else {
+        setInternalBrowseIndex(newIndex)
+      }
+    },
+    [browseIndex, isControlledBrowseIndex, onBrowseIndexChange]
+  )
+
+  // Compute current practice position as a linear index
+  const currentPracticeLinearIndex = useMemo(() => {
+    return getLinearIndex(plan.parts, plan.currentPartIndex, plan.currentSlotIndex)
+  }, [plan.parts, plan.currentPartIndex, plan.currentSlotIndex])
+
+  // When entering browse mode, initialize browseIndex to current problem
+  const prevBrowseModeProp = useRef(isBrowseModeProp)
+  useEffect(() => {
+    if (isBrowseModeProp && !prevBrowseModeProp.current) {
+      // Just entered browse mode - set to current practice position
+      setBrowseIndex(currentPracticeLinearIndex)
+    }
+    prevBrowseModeProp.current = isBrowseModeProp
+  }, [isBrowseModeProp, currentPracticeLinearIndex, setBrowseIndex])
+
   // Track last resume time to reset auto-pause timer after resuming
   const lastResumeTimeRef = useRef<number>(0)
 
@@ -1172,6 +1125,18 @@ export function ActiveSession({
     )
   }
 
+  // Browse mode - show the browse view instead of the practice view
+  if (isBrowseModeProp) {
+    return (
+      <BrowseModeView
+        plan={plan}
+        browseIndex={browseIndex}
+        currentPracticeIndex={currentPracticeLinearIndex}
+        onExitBrowse={onExitBrowse}
+      />
+    )
+  }
+
   return (
     <div
       data-component="active-session"
@@ -1187,212 +1152,6 @@ export function ActiveSession({
         margin: '0 auto',
       })}
     >
-      {/* Practice Session HUD - Control bar with session info and tape-deck controls */}
-      {/* Only render if hideHud is false (default) - when using external HUD in PracticeSubNav */}
-      {!hideHud && (
-        <div
-          data-section="session-hud"
-          className={css({
-            display: 'flex',
-            alignItems: 'center',
-            gap: '0.75rem',
-            padding: '0.75rem 1rem',
-            backgroundColor: 'gray.900',
-            borderRadius: '12px',
-            boxShadow: 'lg',
-          })}
-        >
-          {/* Tape deck controls */}
-          <div
-            data-element="transport-controls"
-            className={css({
-              display: 'flex',
-              gap: '0.5rem',
-            })}
-          >
-            {/* Pause/Play button */}
-            <button
-              type="button"
-              data-action={isPaused ? 'resume' : 'pause'}
-              onClick={isPaused ? handleResume : () => handlePause()}
-              className={css({
-                width: '48px',
-                height: '48px',
-                display: 'flex',
-                alignItems: 'center',
-                justifyContent: 'center',
-                fontSize: '1.5rem',
-                color: 'white',
-                backgroundColor: isPaused ? 'green.500' : 'gray.700',
-                borderRadius: '8px',
-                border: '2px solid',
-                borderColor: isPaused ? 'green.400' : 'gray.600',
-                cursor: 'pointer',
-                transition: 'all 0.15s ease',
-                _hover: {
-                  backgroundColor: isPaused ? 'green.400' : 'gray.600',
-                  transform: 'scale(1.05)',
-                },
-                _active: {
-                  transform: 'scale(0.95)',
-                },
-              })}
-              aria-label={isPaused ? 'Resume session' : 'Pause session'}
-            >
-              {isPaused ? '▶' : '⏸'}
-            </button>
-
-            {/* Stop button */}
-            <button
-              type="button"
-              data-action="end-early"
-              onClick={() => onEndEarly('Session ended')}
-              className={css({
-                width: '48px',
-                height: '48px',
-                display: 'flex',
-                alignItems: 'center',
-                justifyContent: 'center',
-                fontSize: '1.5rem',
-                color: 'red.300',
-                backgroundColor: 'gray.700',
-                borderRadius: '8px',
-                border: '2px solid',
-                borderColor: 'gray.600',
-                cursor: 'pointer',
-                transition: 'all 0.15s ease',
-                _hover: {
-                  backgroundColor: 'red.900',
-                  borderColor: 'red.700',
-                  color: 'red.200',
-                  transform: 'scale(1.05)',
-                },
-                _active: {
-                  transform: 'scale(0.95)',
-                },
-              })}
-              aria-label="End session"
-            >
-              ⏹
-            </button>
-          </div>
-
-          {/* Session info display */}
-          <div
-            data-element="session-info"
-            className={css({
-              flex: 1,
-              display: 'flex',
-              flexDirection: 'column',
-              gap: '0.125rem',
-            })}
-          >
-            {/* Part type with emoji */}
-            <div
-              className={css({
-                display: 'flex',
-                alignItems: 'center',
-                gap: '0.5rem',
-              })}
-            >
-              <span
-                className={css({
-                  fontSize: '1rem',
-                })}
-              >
-                {getPartTypeEmoji(currentPart.type)}
-              </span>
-              <span
-                className={css({
-                  fontSize: '0.875rem',
-                  fontWeight: 'bold',
-                  color: 'white',
-                })}
-              >
-                Part {currentPart.partNumber}: {getPartTypeLabel(currentPart.type)}
-              </span>
-            </div>
-
-            {/* Progress within part */}
-            <div
-              className={css({
-                fontSize: '0.75rem',
-                color: 'gray.400',
-              })}
-            >
-              Problem {currentSlotIndex + 1} of {currentPart.slots.length} in this part
-            </div>
-          </div>
-
-          {/* Overall progress and health */}
-          <div
-            data-element="progress-display"
-            className={css({
-              display: 'flex',
-              alignItems: 'center',
-              gap: '0.75rem',
-            })}
-          >
-            {/* Problem counter */}
-            <div
-              className={css({
-                display: 'flex',
-                flexDirection: 'column',
-                alignItems: 'flex-end',
-              })}
-            >
-              <div
-                className={css({
-                  fontSize: '1rem',
-                  fontWeight: 'bold',
-                  color: 'white',
-                  fontFamily: 'monospace',
-                })}
-              >
-                {completedProblems + 1}/{totalProblems}
-              </div>
-              <div
-                className={css({
-                  fontSize: '0.625rem',
-                  color: 'gray.500',
-                  textTransform: 'uppercase',
-                })}
-              >
-                Total
-              </div>
-            </div>
-
-            {/* Health indicator */}
-            {sessionHealth && (
-              <div
-                data-element="session-health"
-                className={css({
-                  display: 'flex',
-                  flexDirection: 'column',
-                  alignItems: 'center',
-                  padding: '0.25rem 0.5rem',
-                  backgroundColor: 'gray.800',
-                  borderRadius: '6px',
-                })}
-              >
-                <span className={css({ fontSize: '1rem' })}>
-                  {getHealthEmoji(sessionHealth.overall)}
-                </span>
-                <span
-                  className={css({
-                    fontSize: '0.625rem',
-                    fontWeight: 'bold',
-                    color: getHealthColor(sessionHealth.overall),
-                  })}
-                >
-                  {Math.round(sessionHealth.accuracy * 100)}%
-                </span>
-              </div>
-            )}
-          </div>
-        </div>
-      )}
-
       {/* Problem display */}
       <div
         data-section="problem-area"

apps/web/src/components/practice/BrowseModeView.tsx

@@ -0,0 +1,251 @@
+/**
+ * Browse Mode View Component
+ *
+ * Allows browsing through all problems in a session during practice.
+ * Shows problems using DetailedProblemCard.
+ * Navigation is handled via SessionProgressIndicator in the nav bar.
+ * Does not affect actual session progress - just for viewing.
+ */
+
+'use client'
+
+import { useMemo } from 'react'
+import { useTheme } from '@/contexts/ThemeContext'
+import type { ProblemSlot, SessionPart, SessionPlan, SlotResult } from '@/db/schema/session-plans'
+import { css } from '../../../styled-system/css'
+import { calculateAutoPauseInfo } from './autoPauseCalculator'
+import { DetailedProblemCard } from './DetailedProblemCard'
+
+/**
+ * Flattened problem item with all context needed for display
+ */
+export interface LinearProblemItem {
+  partNumber: number
+  slotIndex: number
+  slot: ProblemSlot
+  part: SessionPart
+  linearIndex: number
+}
+
+/**
+ * Build a flattened list of all problems for navigation
+ */
+export function buildLinearProblemList(parts: SessionPart[]): LinearProblemItem[] {
+  const items: LinearProblemItem[] = []
+  let linearIndex = 0
+
+  for (const part of parts) {
+    for (let slotIndex = 0; slotIndex < part.slots.length; slotIndex++) {
+      items.push({
+        partNumber: part.partNumber,
+        slotIndex,
+        slot: part.slots[slotIndex],
+        part,
+        linearIndex,
+      })
+      linearIndex++
+    }
+  }
+
+  return items
+}
+
+/**
+ * Convert current part/slot indices to linear index
+ */
+export function getLinearIndex(
+  parts: SessionPart[],
+  currentPartIndex: number,
+  currentSlotIndex: number
+): number {
+  let index = 0
+  for (let i = 0; i < currentPartIndex; i++) {
+    index += parts[i].slots.length
+  }
+  return index + currentSlotIndex
+}
+
+export interface BrowseModeViewProps {
+  /** The session plan with all problems */
+  plan: SessionPlan
+  /** Current browse index (linear) */
+  browseIndex: number
+  /** The actual current practice problem index (to highlight) */
+  currentPracticeIndex: number
+  /** Called when user wants to exit browse mode and practice the current problem */
+  onExitBrowse?: () => void
+}
+
+/**
+ * Get result for a specific problem if it exists
+ */
+function getResultForProblem(
+  results: SlotResult[],
+  partNumber: number,
+  slotIndex: number
+): SlotResult | undefined {
+  return results.find((r) => r.partNumber === partNumber && r.slotIndex === slotIndex)
+}
+
+export function BrowseModeView({
+  plan,
+  browseIndex,
+  currentPracticeIndex,
+  onExitBrowse,
+}: BrowseModeViewProps) {
+  const { resolvedTheme } = useTheme()
+  const isDark = resolvedTheme === 'dark'
+
+  // Build linear problem list
+  const linearProblems = useMemo(() => buildLinearProblemList(plan.parts), [plan.parts])
+
+  const currentItem = linearProblems[browseIndex]
+
+  // Get result for current browse item
+  const result = useMemo(() => {
+    if (!currentItem) return undefined
+    return getResultForProblem(plan.results, currentItem.partNumber, currentItem.slotIndex)
+  }, [plan.results, currentItem])
+
+  // Calculate auto-pause stats at this position
+  const autoPauseStats = useMemo(() => {
+    if (!currentItem) return undefined
+    // Find the position in results where this problem would be
+    const resultsUpToHere = plan.results.filter((r) => {
+      const rLinear = linearProblems.findIndex(
+        (p) => p.partNumber === r.partNumber && p.slotIndex === r.slotIndex
+      )
+      return rLinear < browseIndex
+    })
+    return calculateAutoPauseInfo(resultsUpToHere).stats
+  }, [plan.results, linearProblems, browseIndex, currentItem])
+
+  // Is this the current practice problem?
+  const isCurrentPractice = browseIndex === currentPracticeIndex
+  const isCompleted = browseIndex < currentPracticeIndex
+  const isUpcoming = browseIndex > currentPracticeIndex
+
+  if (!currentItem) {
+    return (
+      <div
+        className={css({
+          padding: '2rem',
+          textAlign: 'center',
+          color: isDark ? 'gray.400' : 'gray.600',
+        })}
+      >
+        No problems to display
+      </div>
+    )
+  }
+
+  return (
+    <div
+      data-component="browse-mode-view"
+      data-browse-index={browseIndex}
+      className={css({
+        display: 'flex',
+        flexDirection: 'column',
+        gap: '1rem',
+        padding: '1rem',
+        maxWidth: '800px',
+        margin: '0 auto',
+      })}
+    >
+      {/* Current Practice Indicator */}
+      {isCurrentPractice && (
+        <div
+          className={css({
+            padding: '0.5rem 1rem',
+            backgroundColor: isDark ? 'yellow.900' : 'yellow.50',
+            borderRadius: '6px',
+            border: '1px solid',
+            borderColor: isDark ? 'yellow.700' : 'yellow.200',
+            textAlign: 'center',
+            fontSize: '0.875rem',
+            fontWeight: 'bold',
+            color: isDark ? 'yellow.200' : 'yellow.700',
+          })}
+        >
+          This is your current practice problem
+        </div>
+      )}
+
+      {/* Problem Display */}
+      <DetailedProblemCard
+        slot={currentItem.slot}
+        part={currentItem.part}
+        result={result}
+        autoPauseStats={autoPauseStats}
+        isDark={isDark}
+        problemNumber={browseIndex + 1}
+      />
+
+      {/* Action Button */}
+      <div
+        data-element="browse-action"
+        className={css({
+          display: 'flex',
+          justifyContent: 'center',
+          padding: '0.5rem 0',
+        })}
+      >
+        {isCurrentPractice && onExitBrowse && (
+          <button
+            type="button"
+            data-action="practice-this-problem"
+            onClick={onExitBrowse}
+            className={css({
+              padding: '0.75rem 1.5rem',
+              fontSize: '1rem',
+              fontWeight: 'bold',
+              borderRadius: '8px',
+              border: 'none',
+              cursor: 'pointer',
+              backgroundColor: isDark ? 'green.600' : 'green.500',
+              color: 'white',
+              transition: 'all 0.15s ease',
+              _hover: {
+                backgroundColor: isDark ? 'green.500' : 'green.600',
+                transform: 'scale(1.02)',
+              },
+              _active: {
+                transform: 'scale(0.98)',
+              },
+            })}
+          >
+            Practice This Problem
+          </button>
+        )}
+        {isCompleted && (
+          <div
+            data-status="completed"
+            className={css({
+              padding: '0.5rem 1rem',
+              fontSize: '0.875rem',
+              borderRadius: '6px',
+              backgroundColor: isDark ? 'gray.700' : 'gray.200',
+              color: isDark ? 'gray.400' : 'gray.600',
+            })}
+          >
+            This problem was already completed
+          </div>
+        )}
+        {isUpcoming && (
+          <div
+            data-status="upcoming"
+            className={css({
+              padding: '0.5rem 1rem',
+              fontSize: '0.875rem',
+              borderRadius: '6px',
+              backgroundColor: isDark ? 'gray.700' : 'gray.200',
+              color: isDark ? 'gray.400' : 'gray.600',
+            })}
+          >
+            This problem hasn't been reached yet
+          </div>
+        )}
+      </div>
+    </div>
+  )
+}

apps/web/src/components/practice/PracticeSubNav.stories.tsx

@@ -114,23 +114,57 @@ function createSessionHud(config: {
   totalProblems: number
   timing?: TimingData
   health?: { overall: 'good' | 'warning' | 'struggling'; accuracy: number }
+  isBrowseMode?: boolean
 }): SessionHudData {
   const partNumber = config.partType === 'abacus' ? 1 : config.partType === 'visualization' ? 2 : 3
+  const parts = createMockParts()
+  const currentPartIndex = partNumber - 1
+
+  // Create mock results based on completedProblems
+  const results: SlotResult[] = []
+  let remaining = config.completedProblems
+  for (let pIdx = 0; pIdx < parts.length && remaining > 0; pIdx++) {
+    const part = parts[pIdx]
+    const slotsToFill = Math.min(remaining, part.slots.length)
+    for (let sIdx = 0; sIdx < slotsToFill; sIdx++) {
+      results.push({
+        partNumber: (pIdx + 1) as 1 | 2 | 3,
+        slotIndex: sIdx,
+        problem: { terms: [3, 4], answer: 7, skillsRequired: ['basic.directAddition'] },
+        studentAnswer: 7,
+        isCorrect: Math.random() > 0.15,
+        responseTimeMs: 2500 + Math.random() * 3000,
+        skillsExercised: ['basic.directAddition'],
+        usedOnScreenAbacus: pIdx === 0,
+        timestamp: new Date(),
+        helpLevelUsed: 0,
+        incorrectAttempts: 0,
+      })
+    }
+    remaining -= slotsToFill
+  }
+
   return {
     isPaused: config.isPaused ?? false,
+    parts,
+    currentPartIndex,
     currentPart: {
       type: config.partType,
       partNumber,
       totalSlots: 5,
     },
     currentSlotIndex: config.completedProblems % 5,
+    results,
     completedProblems: config.completedProblems,
     totalProblems: config.totalProblems,
     sessionHealth: config.health,
     timing: config.timing,
+    isBrowseMode: config.isBrowseMode ?? false,
     onPause: () => console.log('Pause clicked'),
     onResume: () => console.log('Resume clicked'),
     onEndEarly: () => console.log('End early clicked'),
+    onToggleBrowse: () => console.log('Toggle browse clicked'),
+    onBrowseNavigate: (index) => console.log(`Navigate to problem ${index}`),
   }
 }
 

apps/web/src/components/practice/PracticeSubNav.tsx

@@ -5,6 +5,7 @@ import { useEffect, useState } from 'react'
 import { useTheme } from '@/contexts/ThemeContext'
 import type { SessionPart, SlotResult } from '@/db/schema/session-plans'
 import { css } from '../../../styled-system/css'
+import { SessionProgressIndicator } from './SessionProgressIndicator'
 import { SpeedMeter } from './SpeedMeter'
 
 /**
@@ -27,6 +28,10 @@ export interface TimingData {
 export interface SessionHudData {
   /** Is the session currently paused? */
   isPaused: boolean
+  /** All session parts */
+  parts: SessionPart[]
+  /** Current part index */
+  currentPartIndex: number
   /** Current part info */
   currentPart: {
     type: 'abacus' | 'visualization' | 'linear'
@@ -35,6 +40,8 @@ export interface SessionHudData {
   }
   /** Current slot index within the part */
   currentSlotIndex: number
+  /** All results so far */
+  results: SlotResult[]
   /** Total problems completed so far */
   completedProblems: number
   /** Total problems in session */
@@ -46,10 +53,15 @@ export interface SessionHudData {
   }
   /** Timing data for current problem (optional) */
   timing?: TimingData
+  /** Whether browse mode is active */
+  isBrowseMode: boolean
   /** Callbacks for transport controls */
   onPause: () => void
   onResume: () => void
   onEndEarly: () => void
+  onToggleBrowse: () => void
+  /** Navigate to specific problem in browse mode */
+  onBrowseNavigate?: (linearIndex: number) => void
 }
 
 interface PracticeSubNavProps {
@@ -406,88 +418,79 @@ export function PracticeSubNav({
             >
               ⏹
             </button>
+
+            {/* Browse mode toggle button */}
+            <button
+              type="button"
+              data-action="toggle-browse"
+              data-active={sessionHud.isBrowseMode}
+              onClick={sessionHud.onToggleBrowse}
+              className={css({
+                width: { base: '32px', md: '36px' },
+                height: { base: '32px', md: '36px' },
+                display: 'flex',
+                alignItems: 'center',
+                justifyContent: 'center',
+                fontSize: { base: '1rem', md: '1.125rem' },
+                color: sessionHud.isBrowseMode ? 'white' : isDark ? 'blue.400' : 'blue.500',
+                backgroundColor: sessionHud.isBrowseMode
+                  ? 'blue.500'
+                  : isDark
+                    ? 'gray.700'
+                    : 'gray.200',
+                borderRadius: '6px',
+                border: '2px solid',
+                borderColor: sessionHud.isBrowseMode
+                  ? 'blue.400'
+                  : isDark
+                    ? 'gray.600'
+                    : 'gray.300',
+                cursor: 'pointer',
+                transition: 'all 0.15s ease',
+                _hover: {
+                  backgroundColor: sessionHud.isBrowseMode
+                    ? 'blue.600'
+                    : isDark
+                      ? 'blue.900'
+                      : 'blue.100',
+                  borderColor: sessionHud.isBrowseMode
+                    ? 'blue.500'
+                    : isDark
+                      ? 'blue.700'
+                      : 'blue.300',
+                  transform: 'scale(1.05)',
+                },
+                _active: {
+                  transform: 'scale(0.95)',
+                },
+              })}
+              aria-label={sessionHud.isBrowseMode ? 'Exit browse mode' : 'Browse all problems'}
+              title={sessionHud.isBrowseMode ? 'Exit browse mode' : 'Browse all problems'}
+            >
+              🔢
+            </button>
           </div>
 
-          {/* BIG Progress bar - takes up remaining width */}
+          {/* Session Progress Indicator - discrete problem slots */}
           <div
-            data-element="progress-bar"
+            data-element="progress-indicator"
             className={css({
               flex: 1,
-              display: 'flex',
+              minWidth: 0, // Allow shrinking
-              flexDirection: 'column',
-              gap: '0.25rem',
             })}
           >
-            {/* Labels row */}
+            <SessionProgressIndicator
-            <div
+              parts={sessionHud.parts}
-              className={css({
+              results={sessionHud.results}
-                display: 'flex',
+              currentPartIndex={sessionHud.currentPartIndex}
-                justifyContent: 'space-between',
+              currentSlotIndex={sessionHud.currentSlotIndex}
-                alignItems: 'center',
+              isBrowseMode={sessionHud.isBrowseMode}
-              })}
+              onNavigate={sessionHud.onBrowseNavigate}
-            >
+              averageResponseTimeMs={timingStats?.hasEnoughData ? timingStats.mean : undefined}
-              {/* Mode label on left */}
+              isDark={isDark}
-              <div
+              compact={true}
-                className={css({
-                  display: 'flex',
-                  alignItems: 'center',
-                  gap: '0.375rem',
-                })}
-              >
-                <span
-                  className={css({ fontSize: { base: '1rem', md: '1.125rem' }, lineHeight: 1 })}
-                >
-                  {getPartTypeEmoji(sessionHud.currentPart.type)}
-                </span>
-                <span
-                  className={css({
-                    display: { base: 'none', sm: 'inline' },
-                    fontSize: '0.875rem',
-                    fontWeight: '600',
-                    color: isDark ? 'gray.100' : 'gray.700',
-                  })}
-                >
-                  {getPartTypeLabel(sessionHud.currentPart.type)}
-                </span>
-              </div>
-
-              {/* "X left" on right */}
-              <span
-                className={css({
-                  fontSize: { base: '0.75rem', md: '0.875rem' },
-                  fontWeight: '600',
-                  color: isDark ? 'gray.300' : 'gray.600',
-                })}
-              >
-                {sessionHud.totalProblems - sessionHud.completedProblems} left
-              </span>
-            </div>
-
-            {/* Big chunky progress bar */}
-            <div
-              className={css({
-                width: '100%',
-                height: { base: '12px', md: '16px' },
-                backgroundColor: isDark ? 'gray.700' : 'gray.200',
-                borderRadius: { base: '6px', md: '8px' },
-                overflow: 'hidden',
-                boxShadow: 'inset 0 2px 4px rgba(0,0,0,0.1)',
-              })}
-            >
-              <div
-                className={css({
-                  height: '100%',
-                  backgroundColor: 'green.500',
-                  borderRadius: { base: '6px', md: '8px' },
-                  transition: 'width 0.3s ease',
-                  boxShadow: '0 2px 4px rgba(34, 197, 94, 0.3)',
-                })}
-                style={{
-                  width: `${Math.round((sessionHud.completedProblems / sessionHud.totalProblems) * 100)}%`,
-                }}
             />
           </div>
-          </div>
 
           {/* Timing display */}
           {sessionHud.timing && timingStats && (
@@ -551,9 +554,6 @@ export function PracticeSubNav({
                     currentTimeMs={currentElapsedMs}
                     isDark={isDark}
                     compact={true}
-                    averageLabel=""
-                    fastLabel=""
-                    slowLabel=""
                   />
                 </div>
               )}

apps/web/src/components/practice/PracticeTimingDisplay.tsx

@@ -228,9 +228,6 @@ export function PracticeTimingDisplay({
             currentTimeMs={currentElapsedMs}
             isDark={isDark}
             compact={true}
-            averageLabel={`Avg: ${formatSecondsDecimal(overallStats.mean)}`}
-            fastLabel=""
-            slowLabel=""
           />
         </div>
       )}

apps/web/src/components/practice/SessionProgressIndicator.tsx

@@ -0,0 +1,487 @@
+/**
+ * Session Progress Indicator Component
+ *
+ * A unified progress display that shows:
+ * - Discrete problem slots grouped by section (abacus, visualization, linear)
+ * - Completion status for each problem (correct/incorrect/pending)
+ * - Current position in the session
+ * - Time remaining estimate
+ *
+ * Features:
+ * - Collapsed mode: completed sections show as compact summaries
+ * - Expanded mode (browse): all sections show individual slots for navigation
+ * - Smooth transitions between states
+ * - Click-to-navigate in browse mode
+ */
+
+'use client'
+
+import { useMemo } from 'react'
+import type { SessionPart, SlotResult } from '@/db/schema/session-plans'
+import { css } from '../../../styled-system/css'
+
+export interface SessionProgressIndicatorProps {
+  /** Session parts with their slots */
+  parts: SessionPart[]
+  /** Completed results */
+  results: SlotResult[]
+  /** Current part index */
+  currentPartIndex: number
+  /** Current slot index within the part */
+  currentSlotIndex: number
+  /** Whether browse mode is active (enables navigation) */
+  isBrowseMode: boolean
+  /** Callback when clicking a problem in browse mode */
+  onNavigate?: (linearIndex: number) => void
+  /** Average response time in ms (for time estimate) */
+  averageResponseTimeMs?: number
+  /** Dark mode */
+  isDark: boolean
+  /** Compact mode for smaller screens */
+  compact?: boolean
+}
+
+function getPartEmoji(type: SessionPart['type']): string {
+  switch (type) {
+    case 'abacus':
+      return '🧮'
+    case 'visualization':
+      return '🧠'
+    case 'linear':
+      return '💭'
+  }
+}
+
+function getPartLabel(type: SessionPart['type']): string {
+  switch (type) {
+    case 'abacus':
+      return 'Abacus'
+    case 'visualization':
+      return 'Visual'
+    case 'linear':
+      return 'Mental'
+  }
+}
+
+/**
+ * Get result for a specific slot
+ */
+function getSlotResult(
+  results: SlotResult[],
+  partNumber: number,
+  slotIndex: number
+): SlotResult | undefined {
+  return results.find((r) => r.partNumber === partNumber && r.slotIndex === slotIndex)
+}
+
+/**
+ * Format time as "X min" or "X sec"
+ */
+function formatTimeEstimate(ms: number): string {
+  if (ms < 60000) {
+    return `${Math.round(ms / 1000)}s`
+  }
+  const minutes = Math.round(ms / 60000)
+  return `~${minutes} min`
+}
+
+/**
+ * Collapsed section summary - shows section as compact badge
+ * For completed sections: shows ✓count (green if all correct)
+ * For future sections: shows just the count (gray)
+ */
+function CollapsedSection({
+  part,
+  results,
+  linearOffset,
+  isDark,
+  isBrowseMode,
+  onNavigate,
+  isCompleted,
+}: {
+  part: SessionPart
+  results: SlotResult[]
+  linearOffset: number
+  isDark: boolean
+  isBrowseMode: boolean
+  onNavigate?: (linearIndex: number) => void
+  isCompleted: boolean
+}) {
+  const completedCount = part.slots.filter((_, i) =>
+    getSlotResult(results, part.partNumber, i)
+  ).length
+  const correctCount = part.slots.filter((_, i) => {
+    const result = getSlotResult(results, part.partNumber, i)
+    return result?.isCorrect
+  }).length
+  const allCorrect = isCompleted && correctCount === part.slots.length
+  const totalCount = part.slots.length
+
+  // In browse mode, expand to show individual slots
+  if (isBrowseMode) {
+    return (
+      <ExpandedSection
+        part={part}
+        results={results}
+        linearOffset={linearOffset}
+        currentLinearIndex={-1}
+        isDark={isDark}
+        isBrowseMode={true}
+        onNavigate={onNavigate}
+      />
+    )
+  }
+
+  return (
+    <div
+      data-element="collapsed-section"
+      data-part-type={part.type}
+      data-status={isCompleted ? 'completed' : 'future'}
+      className={css({
+        display: 'flex',
+        alignItems: 'center',
+        gap: '0.25rem',
+        padding: '0.25rem 0.5rem',
+        borderRadius: '6px',
+        backgroundColor: allCorrect
+          ? isDark
+            ? 'green.900/60'
+            : 'green.100'
+          : isDark
+            ? 'gray.700'
+            : 'gray.200',
+        border: '1px solid',
+        borderColor: allCorrect
+          ? isDark
+            ? 'green.700'
+            : 'green.300'
+          : isDark
+            ? 'gray.600'
+            : 'gray.300',
+        flexShrink: 0,
+        transition: 'all 0.2s ease',
+      })}
+    >
+      <span className={css({ fontSize: '0.875rem' })}>{getPartEmoji(part.type)}</span>
+      <span
+        className={css({
+          fontSize: '0.75rem',
+          fontWeight: 'bold',
+          color: allCorrect
+            ? isDark
+              ? 'green.300'
+              : 'green.700'
+            : isDark
+              ? 'gray.300'
+              : 'gray.600',
+        })}
+      >
+        {isCompleted ? `✓${completedCount}` : totalCount}
+      </span>
+    </div>
+  )
+}
+
+/**
+ * Expanded section - shows individual problem slots
+ */
+function ExpandedSection({
+  part,
+  results,
+  linearOffset,
+  currentLinearIndex,
+  isDark,
+  isBrowseMode,
+  onNavigate,
+}: {
+  part: SessionPart
+  results: SlotResult[]
+  linearOffset: number
+  currentLinearIndex: number
+  isDark: boolean
+  isBrowseMode: boolean
+  onNavigate?: (linearIndex: number) => void
+}) {
+  return (
+    <div
+      data-element="expanded-section"
+      data-part-type={part.type}
+      className={css({
+        display: 'flex',
+        alignItems: 'center',
+        gap: '0.25rem',
+        padding: '0.125rem',
+        borderRadius: '6px',
+        backgroundColor: isDark ? 'gray.800/50' : 'gray.100/50',
+        transition: 'all 0.2s ease',
+      })}
+    >
+      {/* Section emoji */}
+      <span
+        className={css({
+          fontSize: '0.75rem',
+          padding: '0 0.25rem',
+          flexShrink: 0,
+        })}
+        title={getPartLabel(part.type)}
+      >
+        {getPartEmoji(part.type)}
+      </span>
+
+      {/* Individual slots */}
+      {part.slots.map((_, slotIndex) => {
+        const linearIndex = linearOffset + slotIndex
+        const result = getSlotResult(results, part.partNumber, slotIndex)
+        const isCurrent = linearIndex === currentLinearIndex
+        const isCompleted = result !== undefined
+        const isCorrect = result?.isCorrect
+
+        const isClickable = isBrowseMode && onNavigate
+
+        return (
+          <button
+            key={slotIndex}
+            type="button"
+            data-slot-index={slotIndex}
+            data-linear-index={linearIndex}
+            data-status={
+              isCurrent
+                ? 'current'
+                : isCompleted
+                  ? isCorrect
+                    ? 'correct'
+                    : 'incorrect'
+                  : 'pending'
+            }
+            onClick={isClickable ? () => onNavigate(linearIndex) : undefined}
+            disabled={!isClickable}
+            className={css({
+              width: '20px',
+              height: '20px',
+              display: 'flex',
+              alignItems: 'center',
+              justifyContent: 'center',
+              fontSize: '0.625rem',
+              fontWeight: isCurrent ? 'bold' : 'normal',
+              borderRadius: '4px',
+              border: '1px solid',
+              cursor: isClickable ? 'pointer' : 'default',
+              transition: 'all 0.15s ease',
+              // Current problem
+              ...(isCurrent && {
+                backgroundColor: isDark ? 'yellow.600' : 'yellow.400',
+                borderColor: isDark ? 'yellow.500' : 'yellow.500',
+                color: isDark ? 'yellow.100' : 'yellow.900',
+                boxShadow: `0 0 0 2px ${isDark ? 'rgba(234, 179, 8, 0.3)' : 'rgba(234, 179, 8, 0.4)'}`,
+              }),
+              // Completed correct
+              ...(!isCurrent &&
+                isCompleted &&
+                isCorrect && {
+                  backgroundColor: isDark ? 'green.900' : 'green.100',
+                  borderColor: isDark ? 'green.700' : 'green.300',
+                  color: isDark ? 'green.300' : 'green.700',
+                }),
+              // Completed incorrect
+              ...(!isCurrent &&
+                isCompleted &&
+                !isCorrect && {
+                  backgroundColor: isDark ? 'red.900' : 'red.100',
+                  borderColor: isDark ? 'red.700' : 'red.300',
+                  color: isDark ? 'red.300' : 'red.700',
+                }),
+              // Pending
+              ...(!isCurrent &&
+                !isCompleted && {
+                  backgroundColor: isDark ? 'gray.700' : 'gray.200',
+                  borderColor: isDark ? 'gray.600' : 'gray.300',
+                  color: isDark ? 'gray.400' : 'gray.500',
+                }),
+              // Hover effect in browse mode
+              ...(isClickable && {
+                _hover: {
+                  transform: 'scale(1.15)',
+                  boxShadow: '0 2px 4px rgba(0,0,0,0.2)',
+                },
+              }),
+            })}
+            title={isBrowseMode ? `Go to problem ${linearIndex + 1}` : undefined}
+          >
+            {isBrowseMode ? linearIndex + 1 : isCompleted ? (isCorrect ? '✓' : '✗') : '○'}
+          </button>
+        )
+      })}
+    </div>
+  )
+}
+
+export function SessionProgressIndicator({
+  parts,
+  results,
+  currentPartIndex,
+  currentSlotIndex,
+  isBrowseMode,
+  onNavigate,
+  averageResponseTimeMs,
+  isDark,
+  compact = false,
+}: SessionProgressIndicatorProps) {
+  // Calculate linear index for current position
+  const currentLinearIndex = useMemo(() => {
+    let index = 0
+    for (let i = 0; i < currentPartIndex; i++) {
+      index += parts[i].slots.length
+    }
+    return index + currentSlotIndex
+  }, [parts, currentPartIndex, currentSlotIndex])
+
+  // Calculate totals
+  const { totalProblems, completedProblems, remainingProblems } = useMemo(() => {
+    const total = parts.reduce((sum, part) => sum + part.slots.length, 0)
+    const completed = results.length
+    return {
+      totalProblems: total,
+      completedProblems: completed,
+      remainingProblems: total - completed,
+    }
+  }, [parts, results])
+
+  // Time estimate
+  const timeEstimate = useMemo(() => {
+    if (!averageResponseTimeMs || remainingProblems === 0) return null
+    return averageResponseTimeMs * remainingProblems
+  }, [averageResponseTimeMs, remainingProblems])
+
+  // Track linear offset for each part
+  let linearOffset = 0
+
+  return (
+    <div
+      data-component="session-progress-indicator"
+      data-browse-mode={isBrowseMode}
+      className={css({
+        display: 'flex',
+        alignItems: 'center',
+        gap: compact ? '0.375rem' : '0.5rem',
+        padding: compact ? '0.25rem' : '0.375rem',
+        backgroundColor: isDark ? 'gray.800' : 'gray.100',
+        borderRadius: '8px',
+        overflow: 'hidden',
+        minHeight: '36px',
+      })}
+    >
+      {/* Section indicators */}
+      <div
+        data-element="sections"
+        className={css({
+          display: 'flex',
+          alignItems: 'center',
+          gap: '0.375rem',
+          flex: 1,
+          overflowX: 'auto',
+          overflowY: 'hidden',
+          // Hide scrollbar but allow scrolling
+          scrollbarWidth: 'none',
+          '&::-webkit-scrollbar': {
+            display: 'none',
+          },
+        })}
+      >
+        {parts.map((part, partIndex) => {
+          const partLinearOffset = linearOffset
+          linearOffset += part.slots.length
+
+          const isCurrentPart = partIndex === currentPartIndex
+          const isCompletedPart = partIndex < currentPartIndex
+          const isFuturePart = partIndex > currentPartIndex
+
+          // In browse mode: always expanded
+          // In practice mode: collapse non-current sections (both completed and future)
+          const shouldCollapse = !isBrowseMode && !isCurrentPart
+
+          return (
+            <div
+              key={part.partNumber}
+              className={css({ display: 'flex', alignItems: 'center', gap: '0.25rem' })}
+            >
+              {/* Part separator for non-first parts */}
+              {partIndex > 0 && (
+                <div
+                  className={css({
+                    width: '1px',
+                    height: '20px',
+                    backgroundColor: isDark ? 'gray.600' : 'gray.300',
+                    flexShrink: 0,
+                  })}
+                />
+              )}
+
+              {shouldCollapse ? (
+                <CollapsedSection
+                  part={part}
+                  results={results}
+                  linearOffset={partLinearOffset}
+                  isDark={isDark}
+                  isBrowseMode={isBrowseMode}
+                  onNavigate={onNavigate}
+                  isCompleted={isCompletedPart}
+                />
+              ) : (
+                <ExpandedSection
+                  part={part}
+                  results={results}
+                  linearOffset={partLinearOffset}
+                  currentLinearIndex={currentLinearIndex}
+                  isDark={isDark}
+                  isBrowseMode={isBrowseMode}
+                  onNavigate={onNavigate}
+                />
+              )}
+            </div>
+          )
+        })}
+      </div>
+
+      {/* Summary stats */}
+      <div
+        data-element="summary"
+        className={css({
+          display: 'flex',
+          alignItems: 'center',
+          gap: '0.5rem',
+          flexShrink: 0,
+          paddingLeft: '0.5rem',
+          borderLeft: '1px solid',
+          borderColor: isDark ? 'gray.600' : 'gray.300',
+        })}
+      >
+        {/* Progress count */}
+        <span
+          className={css({
+            fontSize: compact ? '0.6875rem' : '0.75rem',
+            fontWeight: 'bold',
+            color: isDark ? 'gray.300' : 'gray.600',
+            whiteSpace: 'nowrap',
+          })}
+        >
+          {completedProblems}/{totalProblems}
+        </span>
+
+        {/* Time estimate */}
+        {timeEstimate && !isBrowseMode && (
+          <span
+            className={css({
+              fontSize: compact ? '0.625rem' : '0.6875rem',
+              color: isDark ? 'gray.400' : 'gray.500',
+              whiteSpace: 'nowrap',
+            })}
+          >
+            {formatTimeEstimate(timeEstimate)}
+          </span>
+        )}
+      </div>
+    </div>
+  )
+}
+
+export default SessionProgressIndicator

apps/web/src/components/practice/SpeedMeter.tsx

@@ -15,16 +15,22 @@ export interface SpeedMeterProps {
   currentTimeMs?: number
   /** Optional compact mode for inline display */
   compact?: boolean
-  /** Label for the average marker (default: "Your usual speed") */
-  averageLabel?: string
-  /** Label for the fast end (default: "Fast") */
-  fastLabel?: string
-  /** Label for the slow/threshold end (default: "Pause") */
-  slowLabel?: string
 }
 
 /**
- * Speed visualization bar - shows average speed vs variation
+ * Format milliseconds to a kid-friendly short time string
+ * Under 60s: "Xs" (e.g., "8s", "30s")
+ * 60s+: "Xm" (e.g., "2m")
+ */
+function formatTimeShort(ms: number): string {
+  const seconds = Math.round(ms / 1000)
+  if (seconds < 60) return `${seconds}s`
+  const minutes = Math.round(seconds / 60)
+  return `${minutes}m`
+}
+
+/**
+ * Speed visualization bar - shows average speed vs variation with actual time values
  * Used in session pause modal and timing displays to visualize response time patterns
  */
 export function SpeedMeter({
@@ -34,14 +40,11 @@ export function SpeedMeter({
   isDark,
   currentTimeMs,
   compact = false,
-  averageLabel = 'Your usual speed',
-  fastLabel = 'Fast',
-  slowLabel = 'Pause',
 }: SpeedMeterProps) {
-  // Scale so the mean is around 50% and threshold is at 100%
+  // Scale so threshold is at ~83% instead of 100%, giving visual room beyond it
-  // This ensures the visualization is always meaningful regardless of absolute values
+  const scaleMax = thresholdMs * 1.2
-  const scaleMax = thresholdMs
   const meanPercent = Math.min(95, Math.max(5, (meanMs / scaleMax) * 100))
+  const thresholdPercent = (thresholdMs / scaleMax) * 100 // ~83%
 
   // Variation should be visible but proportional - minimum 8% width for visibility
   const rawVariationPercent = (stdDevMs / scaleMax) * 100
@@ -52,9 +55,14 @@ export function SpeedMeter({
     ? Math.min(110, Math.max(0, (currentTimeMs / scaleMax) * 100))
     : null
 
+  // Check if mean and threshold labels would overlap (within 15% of each other)
+  const labelsWouldOverlap = thresholdPercent - meanPercent < 15
+
   const barHeight = compact ? '16px' : '24px'
   const markerTop = compact ? '-2px' : '-4px'
   const markerHeight = compact ? '20px' : '32px'
+  const labelFontSize = compact ? '0.625rem' : '0.75rem'
+  const smallLabelFontSize = compact ? '0.5rem' : '0.625rem'
 
   return (
     <div
@@ -117,7 +125,7 @@ export function SpeedMeter({
               position: 'absolute',
               width: '4px',
               backgroundColor:
-                currentPercent > 100
+                currentPercent > thresholdPercent
                   ? isDark
                     ? 'red.400'
                     : 'red.500'
@@ -152,31 +160,87 @@ export function SpeedMeter({
             borderRadius: '2px',
           })}
           style={{
-            left: 'calc(100% - 2px)',
+            left: `calc(${thresholdPercent}% - 2px)`,
           }}
         />
       </div>
 
-      {/* Labels */}
+      {/* Time labels positioned under their markers */}
       <div
         className={css({
-          display: 'flex',
+          position: 'relative',
-          justifyContent: 'space-between',
+          height: compact ? '1.75rem' : '2.25rem',
-          marginTop: compact ? '0.25rem' : '0.5rem',
+          marginTop: compact ? '0.25rem' : '0.375rem',
-          color: isDark ? 'gray.400' : 'gray.500',
         })}
-        style={{ fontSize: compact ? '0.625rem' : '0.6875rem' }}
       >
-        <span>{fastLabel}</span>
+        {/* 0s label at left */}
         <span
           className={css({
+            position: 'absolute',
+            left: 0,
+            color: isDark ? 'gray.500' : 'gray.400',
+          })}
+          style={{ fontSize: labelFontSize }}
+        >
+          0s
+        </span>
+
+        {/* Average time label - positioned at mean marker */}
+        {!labelsWouldOverlap && (
+          <span
+            className={css({
+              position: 'absolute',
+              textAlign: 'center',
               color: isDark ? 'blue.300' : 'blue.600',
               fontWeight: 'bold',
+              display: 'flex',
+              flexDirection: 'column',
+              alignItems: 'center',
+              lineHeight: 1.2,
             })}
+            style={{
+              left: `${meanPercent}%`,
+              transform: 'translateX(-50%)',
+              fontSize: labelFontSize,
+            }}
           >
-          {averageLabel}
+            ~{formatTimeShort(meanMs)}
+            <span
+              className={css({ fontWeight: 'normal', color: isDark ? 'gray.400' : 'gray.500' })}
+              style={{ fontSize: smallLabelFontSize }}
+            >
+              avg
+            </span>
+          </span>
+        )}
+
+        {/* Threshold time label - positioned at threshold marker */}
+        <span
+          className={css({
+            position: 'absolute',
+            textAlign: 'center',
+            color: isDark ? 'yellow.300' : 'yellow.700',
+            fontWeight: 'bold',
+            display: 'flex',
+            flexDirection: 'column',
+            alignItems: 'center',
+            lineHeight: 1.2,
+          })}
+          style={{
+            left: `${thresholdPercent}%`,
+            transform: 'translateX(-50%)',
+            fontSize: labelFontSize,
+          }}
+        >
+          {labelsWouldOverlap ? `~${formatTimeShort(meanMs)} / ` : ''}
+          {formatTimeShort(thresholdMs)}
+          <span
+            className={css({ fontWeight: 'normal', color: isDark ? 'gray.400' : 'gray.500' })}
+            style={{ fontSize: smallLabelFontSize }}
+          >
+            {labelsWouldOverlap ? 'avg / pause' : 'pause'}
+          </span>
         </span>
-        <span>{slowLabel}</span>
       </div>
     </div>
   )

apps/web/src/components/practice/index.ts

@@ -17,11 +17,14 @@ export { NumericKeypad } from './NumericKeypad'
 export { PracticeErrorBoundary } from './PracticeErrorBoundary'
 export type { SessionHudData } from './PracticeSubNav'
 export { PracticeSubNav } from './PracticeSubNav'
+export type { SessionProgressIndicatorProps } from './SessionProgressIndicator'
+export { SessionProgressIndicator } from './SessionProgressIndicator'
 export { PracticeTimingDisplay } from './PracticeTimingDisplay'
 export type { ActiveSessionState, CurrentPhaseInfo, SkillProgress } from './ProgressDashboard'
 export { ProgressDashboard } from './ProgressDashboard'
 export type { AutoPauseStats, PauseInfo } from './SessionPausedModal'
 export { SessionPausedModal } from './SessionPausedModal'
+export { SessionOverview } from './SessionOverview'
 export { SessionSummary } from './SessionSummary'
 export { SkillPerformanceReports } from './SkillPerformanceReports'
 export type { SpeedMeterProps } from './SpeedMeter'