feat(audio-player): per-book playback speed + user default (plan §8)

Speed becomes a per-USER-per-BOOK preference that syncs across
devices, with a user-level default for books not yet played:
- new audio_playback_speed table (mirrors reading_speed's shape; a
  preference, NOT a measurement and NOT a reading_progress column) +
  users.default_audio_speed, schema in place
- chapters endpoint resolves per-book row → user default → 1.0 and
  ships playback_speed + default_playback_speed (zero extra round
  trips; default powers the dropdown marker)
- PUT /api/media-items/:id/audio-speed upserts (range-checked; the
  client SPEEDS list stays the real gate; library visibility gates
  writes)
- the user default rides the profile path like theme/timezone:
  profile form gains a 'Default Playback Speed' select (server-side
  SpeedOptions mirrors the web SPEEDS list), GET /profile carries it
- web: restorePosition applies the resolved server speed (localStorage
  audio_speed demotes to a first-paint cache); setSpeed PUTs
  fire-and-forget with a failure toast; the Speed dropdown gains a
  '(default)' row marker and a 'Make N× my default' action with a
  success toast

ALSO fixes a pre-existing profile-page bug surfaced by the §8 form
verification: the password section's current_password input was
required INSIDE the shared form, so HTML5 validation blocked every
Save Changes submission (dead since the shell migration). The
password flow keeps its own gates (disabled-button checkers + server
400).

Integration test TestAudioPlaybackSpeed pins the full contract (unset
→ 1x, upsert resolution, range rejection, default fallback for
row-less books, default updates re-satisfying unset books). Verified
live: 9 Playwright checks.

cmd/server/tests/audio_speed_test.go

@@ -0,0 +1,172 @@
+package main
+
+// Playback speed preferences (player plan §8): a per-user PER-BOOK
+// speed plus a user-level default, resolved at the chapters endpoint
+// (per-book row → users.default_audio_speed → 1.0). All speed writes
+// ride the fresh per-test regular user — the shared admin account is
+// never touched (AGENTS doctrine). Fixture books live in test-named
+// libraries that cascade away with the library delete.
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/stretchr/testify/require"
+)
+
+// writeTestTrackTone renders a short sine mp3 at a GIVEN frequency so
+// multiple fixture books never collide on the scanner's content dedup.
+// Falls back to dummy bytes (ingest is ffprobe-optional) like
+// writeTestTrack.
+func writeTestTrackTone(t *testing.T, path string, hz int) {
+	t.Helper()
+	require.NoError(t, os.MkdirAll(filepath.Dir(path), 0o755))
+	if ffmpeg, err := exec.LookPath("ffmpeg"); err == nil {
+		cmd := exec.Command(ffmpeg, "-y", "-v", "error", "-f", "lavfi",
+			"-i", fmt.Sprintf("sine=frequency=%d:duration=0.3", hz), "-codec:a", "libmp3lame", "-b:a", "32k", path)
+		if out, err := cmd.CombinedOutput(); err == nil {
+			return
+		} else {
+			t.Logf("ffmpeg track render failed (%s), falling back to dummy bytes: %s", err, out)
+		}
+	}
+	require.NoError(t, os.WriteFile(path, []byte(fmt.Sprintf("ID3 dummy audio %d", hz)), 0o644))
+}
+
+func TestAudioPlaybackSpeed(t *testing.T) {
+	setup := setupTestServer(t)
+	t.Cleanup(func() { _ = setup.Close() })
+
+	admin, _ := moveTestAdminID(t, setup)
+	libID, folder := audioTestLibrary(t, setup, fmt.Sprintf("Test Audio Speed %d", time.Now().UnixNano()))
+	t.Cleanup(func() { deleteLibraries(t, setup, libID) })
+
+	writeTestTrack(t, filepath.Join(folder, "Speed Book", "01 one.mp3"))
+	// 552 Hz (not the shared helper's 440) so the scanner's sha-256
+	// dedup doesn't skip the second book as a byte-duplicate.
+	writeTestTrackTone(t, filepath.Join(folder, "Speed Book Two", "01 one.mp3"), 552)
+	scanTestFolder(t, setup, admin, folder)
+
+	// Grouping depends on track count (single-track folders ingest as
+	// single-file items whose path IS the file; multi-track folders get
+	// the folder path) — find by the library-relative path CONTAINING
+	// the book folder so the test holds either way.
+	var bookPath, book2Path string
+	for _, item := range listLibraryAudioItems(t, setup, libID) {
+		p := filepath.ToSlash(item.FilePath)
+		t.Logf("ingested item path: %s", p)
+		if strings.Contains(p, "Speed Book Two") && book2Path == "" {
+			book2Path = p
+		} else if strings.Contains(p, "Speed Book/") && bookPath == "" {
+			bookPath = p
+		}
+	}
+	require.NotEmpty(t, bookPath, "Speed Book item must exist")
+	require.NotEmpty(t, book2Path, "Speed Book Two item must exist")
+	book, found := findAudioItemByPath(t, setup, libID, bookPath)
+	require.True(t, found)
+	bookID := uuid.UUID(book.ID.Bytes)
+	book2, found := findAudioItemByPath(t, setup, libID, book2Path)
+	require.True(t, found)
+	book2ID := uuid.UUID(book2.ID.Bytes)
+
+	client := &http.Client{}
+	token := setup.RegularToken
+	authed := func(method, url, body string) (*http.Response, func()) {
+		var req *http.Request
+		if body == "" {
+			req, _ = http.NewRequest(method, url, nil)
+		} else {
+			req, _ = http.NewRequest(method, url, strings.NewReader(body))
+			req.Header.Set("Content-Type", "application/json")
+		}
+		req.Header.Set("Authorization", "Bearer "+token)
+		resp, err := client.Do(req)
+		require.NoError(t, err)
+		return resp, func() { _ = resp.Body.Close() }
+	}
+	getSpeeds := func(itemID uuid.UUID) (playback, def float64) {
+		resp, closer := authed("GET", setup.Server.URL+"/api/media-items/"+itemID.String()+"/chapters", "")
+		defer closer()
+		require.Equal(t, http.StatusOK, resp.StatusCode)
+		var data struct {
+			PlaybackSpeed       float64 `json:"playback_speed"`
+			DefaultPlaybackSpeed float64 `json:"default_playback_speed"`
+		}
+		require.NoError(t, json.NewDecoder(resp.Body).Decode(&data))
+		return data.PlaybackSpeed, data.DefaultPlaybackSpeed
+	}
+
+	t.Run("unset resolves to 1x", func(t *testing.T) {
+		playback, def := getSpeeds(bookID)
+		require.Equal(t, 1.0, playback)
+		require.Equal(t, 1.0, def)
+	})
+
+	t.Run("put per-book speed upserts and resolves", func(t *testing.T) {
+		resp, closer := authed("PUT", setup.Server.URL+"/api/media-items/"+bookID.String()+"/audio-speed", `{"speed":1.5}`)
+		defer closer()
+		require.Equal(t, http.StatusOK, resp.StatusCode)
+		var saved struct {
+			PlaybackSpeed float64 `json:"playback_speed"`
+		}
+		require.NoError(t, json.NewDecoder(resp.Body).Decode(&saved))
+		require.Equal(t, 1.5, saved.PlaybackSpeed)
+
+		playback, def := getSpeeds(bookID)
+		require.Equal(t, 1.5, playback)
+		require.Equal(t, 1.0, def) // user default untouched
+	})
+
+	t.Run("out of range speed is rejected", func(t *testing.T) {
+		for _, body := range []string{`{"speed":99}`, `{"speed":0}`, `{"speed":0.1}`} {
+			resp, closer := authed("PUT", setup.Server.URL+"/api/media-items/"+bookID.String()+"/audio-speed", body)
+			require.Equal(t, http.StatusBadRequest, resp.StatusCode)
+			closer()
+		}
+		// The stored speed is untouched by the rejects.
+		playback, _ := getSpeeds(bookID)
+		require.Equal(t, 1.5, playback)
+	})
+
+	t.Run("profile default applies to books without their own speed", func(t *testing.T) {
+		resp, closer := authed("PUT", setup.Server.URL+"/api/auth/profile", `{"default_audio_speed":1.25}`)
+		defer closer()
+		require.Equal(t, http.StatusOK, resp.StatusCode)
+
+		// Per-book row wins over the default on book one...
+		playback, def := getSpeeds(bookID)
+		require.Equal(t, 1.5, playback)
+		require.Equal(t, 1.25, def)
+		// ...book two has no row and picks the default up.
+		playback2, _ := getSpeeds(book2ID)
+		require.Equal(t, 1.25, playback2)
+
+		// GET /profile carries it for the profile form.
+		resp2, closer2 := authed("GET", setup.Server.URL+"/api/auth/profile", "")
+		defer closer2()
+		var profile struct {
+			DefaultAudioSpeed float64 `json:"default_audio_speed"`
+		}
+		require.NoError(t, json.NewDecoder(resp2.Body).Decode(&profile))
+		require.Equal(t, 1.25, profile.DefaultAudioSpeed)
+	})
+
+	t.Run("updating the default re-satisfies unset books", func(t *testing.T) {
+		resp, closer := authed("PUT", setup.Server.URL+"/api/auth/profile", `{"default_audio_speed":0.75}`)
+		defer closer()
+		require.Equal(t, http.StatusOK, resp.StatusCode)
+		playback2, _ := getSpeeds(book2ID)
+		require.Equal(t, 0.75, playback2)
+		playback1, _ := getSpeeds(bookID)
+		require.Equal(t, 1.5, playback1) // per-book pin survives
+	})
+}

database/schema/schema.sql

@@ -37,6 +37,11 @@ CREATE TABLE IF NOT EXISTS users (
     updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
 );
 
+-- User-level default audiobook playback speed (player plan §8): books
+-- without a per-book audio_playback_speed row pick this up. REAL
+-- mirrors the per-book table's column.
+ALTER TABLE users ADD COLUMN IF NOT EXISTS default_audio_speed REAL NOT NULL DEFAULT 1.0;
+
 -- Create system_settings table
 CREATE TABLE IF NOT EXISTS system_settings (
     id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
@@ -1563,6 +1568,24 @@ CREATE TABLE IF NOT EXISTS reading_speed (
 CREATE INDEX IF NOT EXISTS idx_reading_speed_user ON reading_speed(user_id);
 CREATE INDEX IF NOT EXISTS idx_reading_speed_item ON reading_speed(media_item_id);
 
+-- Per-user PER-BOOK playback speed preference (player plan §8): a
+-- preference, NOT a measurement (reading_speed holds measured rates),
+-- and NOT a reading_progress column (a speed tap must not create a
+-- "currently reading" row). Resolution lives at the chapters endpoint:
+-- per-book row → users.default_audio_speed → 1.0.
+CREATE TABLE IF NOT EXISTS audio_playback_speed (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  media_item_id UUID NOT NULL REFERENCES media_items(id) ON DELETE CASCADE,
+  speed REAL NOT NULL DEFAULT 1.0,
+  created_at TIMESTAMPTZ DEFAULT NOW(),
+  updated_at TIMESTAMPTZ DEFAULT NOW(),
+  UNIQUE(user_id, media_item_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_audio_playback_speed_user ON audio_playback_speed(user_id);
+CREATE INDEX IF NOT EXISTS idx_audio_playback_speed_item ON audio_playback_speed(media_item_id);
+
 -- Dictionary cache (for offline use)
 CREATE TABLE IF NOT EXISTS dictionary_cache (
   id UUID PRIMARY KEY DEFAULT gen_random_uuid(),

internal/database/models.go

@@ -8,6 +8,15 @@ import (
 	"github.com/jackc/pgx/v5/pgtype"
 )
 
+type AudioPlaybackSpeed struct {
+	ID          pgtype.UUID        `db:"id" json:"id"`
+	UserID      pgtype.UUID        `db:"user_id" json:"user_id"`
+	MediaItemID pgtype.UUID        `db:"media_item_id" json:"media_item_id"`
+	Speed       float32            `db:"speed" json:"speed"`
+	CreatedAt   pgtype.Timestamptz `db:"created_at" json:"created_at"`
+	UpdatedAt   pgtype.Timestamptz `db:"updated_at" json:"updated_at"`
+}
+
 type CollectionItems struct {
 	ID            pgtype.UUID        `db:"id" json:"id"`
 	CollectionID  pgtype.UUID        `db:"collection_id" json:"collection_id"`
@@ -587,4 +596,5 @@ type Users struct {
 	CreatedAt         pgtype.Timestamptz `db:"created_at" json:"created_at"`
 	Timezone          pgtype.Text        `db:"timezone" json:"timezone"`
 	UpdatedAt         pgtype.Timestamptz `db:"updated_at" json:"updated_at"`
+	DefaultAudioSpeed float32            `db:"default_audio_speed" json:"default_audio_speed"`
 }

internal/database/querier.go

@@ -202,6 +202,8 @@ type Querier interface {
 	GetAllSystemSettings(ctx context.Context) ([]GetAllSystemSettingsRow, error)
 	GetAllSystemSettingsFull(ctx context.Context) ([]SystemSettings, error)
 	GetAnnotationsForBook(ctx context.Context, arg GetAnnotationsForBookParams) ([]GetAnnotationsForBookRow, error)
+	// Per-book playback speed preference (player plan §8).
+	GetAudioPlaybackSpeed(ctx context.Context, arg GetAudioPlaybackSpeedParams) (float32, error)
 	// Lifetime session rows for ONE book (the book-detail stats card).
 	GetBookReadingSessions(ctx context.Context, arg GetBookReadingSessionsParams) ([]GetBookReadingSessionsRow, error)
 	GetBooksByTag(ctx context.Context, arg GetBooksByTagParams) ([]MediaItems, error)
@@ -696,12 +698,14 @@ type Querier interface {
 	UpdateSystemSetting(ctx context.Context, arg UpdateSystemSettingParams) error
 	// Update universal progress
 	UpdateUniversalProgress(ctx context.Context, arg UpdateUniversalProgressParams) (ReadingProgress, error)
+	UpdateUserDefaultAudioSpeed(ctx context.Context, arg UpdateUserDefaultAudioSpeedParams) error
 	UpdateUserMaxDevices(ctx context.Context, arg UpdateUserMaxDevicesParams) (Users, error)
 	UpdateUserProfile(ctx context.Context, arg UpdateUserProfileParams) error
 	UpdateUserRole(ctx context.Context, arg UpdateUserRoleParams) (UpdateUserRoleRow, error)
 	UpdateUserTheme(ctx context.Context, arg UpdateUserThemeParams) error
 	UpdateUserTimezone(ctx context.Context, arg UpdateUserTimezoneParams) error
 	UpdateUsername(ctx context.Context, arg UpdateUsernameParams) error
+	UpsertAudioPlaybackSpeed(ctx context.Context, arg UpsertAudioPlaybackSpeedParams) (float32, error)
 	UpsertDashboardPreferences(ctx context.Context, arg UpsertDashboardPreferencesParams) (UserDashboardPreferences, error)
 	UpsertGlobalDashboardPreferences(ctx context.Context, arg UpsertGlobalDashboardPreferencesParams) (UserDashboardPreferencesGlobal, error)
 	UpsertMediaReview(ctx context.Context, arg UpsertMediaReviewParams) (MediaReviews, error)

internal/database/queries.sql.go

@@ -3761,6 +3761,25 @@ func (q *Queries) GetAnnotationsForBook(ctx context.Context, arg GetAnnotationsF
 	return items, nil
 }
 
+const GetAudioPlaybackSpeed = `-- name: GetAudioPlaybackSpeed :one
+
+SELECT speed FROM audio_playback_speed
+WHERE user_id = $1 AND media_item_id = $2
+`
+
+type GetAudioPlaybackSpeedParams struct {
+	UserID      pgtype.UUID `db:"user_id" json:"user_id"`
+	MediaItemID pgtype.UUID `db:"media_item_id" json:"media_item_id"`
+}
+
+// Per-book playback speed preference (player plan §8).
+func (q *Queries) GetAudioPlaybackSpeed(ctx context.Context, arg GetAudioPlaybackSpeedParams) (float32, error) {
+	row := q.db.QueryRow(ctx, GetAudioPlaybackSpeed, arg.UserID, arg.MediaItemID)
+	var speed float32
+	err := row.Scan(&speed)
+	return speed, err
+}
+
 const GetBookReadingSessions = `-- name: GetBookReadingSessions :many
 SELECT
     rh.id, rh.device_id, rh.progress_percentage,
@@ -9922,6 +9941,7 @@ SELECT
     u.created_at,
     u.updated_at,
     u.timezone,
+    u.default_audio_speed,
     (SELECT COUNT(*) FROM devices WHERE user_id = u.id) as device_count
 FROM users u
 WHERE u.id = $1
@@ -9939,6 +9959,7 @@ type GetUserRow struct {
 	CreatedAt         pgtype.Timestamptz `db:"created_at" json:"created_at"`
 	UpdatedAt         pgtype.Timestamptz `db:"updated_at" json:"updated_at"`
 	Timezone          pgtype.Text        `db:"timezone" json:"timezone"`
+	DefaultAudioSpeed float32            `db:"default_audio_speed" json:"default_audio_speed"`
 	DeviceCount       int64              `db:"device_count" json:"device_count"`
 }
 
@@ -9957,6 +9978,7 @@ func (q *Queries) GetUser(ctx context.Context, id pgtype.UUID) (GetUserRow, erro
 		&i.CreatedAt,
 		&i.UpdatedAt,
 		&i.Timezone,
+		&i.DefaultAudioSpeed,
 		&i.DeviceCount,
 	)
 	return i, err
@@ -17200,9 +17222,23 @@ func (q *Queries) UpdateUniversalProgress(ctx context.Context, arg UpdateUnivers
 	return i, err
 }
 
+const UpdateUserDefaultAudioSpeed = `-- name: UpdateUserDefaultAudioSpeed :exec
+UPDATE users SET default_audio_speed = $2, updated_at = NOW() WHERE id = $1
+`
+
+type UpdateUserDefaultAudioSpeedParams struct {
+	ID                pgtype.UUID `db:"id" json:"id"`
+	DefaultAudioSpeed float32     `db:"default_audio_speed" json:"default_audio_speed"`
+}
+
+func (q *Queries) UpdateUserDefaultAudioSpeed(ctx context.Context, arg UpdateUserDefaultAudioSpeedParams) error {
+	_, err := q.db.Exec(ctx, UpdateUserDefaultAudioSpeed, arg.ID, arg.DefaultAudioSpeed)
+	return err
+}
+
 const UpdateUserMaxDevices = `-- name: UpdateUserMaxDevices :one
 UPDATE users SET max_devices = $2, updated_at = NOW() WHERE id = $1
-RETURNING id, email, username, password_hash, first_name, last_name, role, theme, max_devices, created_at, timezone, updated_at
+RETURNING id, email, username, password_hash, first_name, last_name, role, theme, max_devices, created_at, timezone, updated_at, default_audio_speed
 `
 
 type UpdateUserMaxDevicesParams struct {
@@ -17226,6 +17262,7 @@ func (q *Queries) UpdateUserMaxDevices(ctx context.Context, arg UpdateUserMaxDev
 		&i.CreatedAt,
 		&i.Timezone,
 		&i.UpdatedAt,
+		&i.DefaultAudioSpeed,
 	)
 	return i, err
 }
@@ -17316,6 +17353,27 @@ func (q *Queries) UpdateUsername(ctx context.Context, arg UpdateUsernameParams)
 	return err
 }
 
+const UpsertAudioPlaybackSpeed = `-- name: UpsertAudioPlaybackSpeed :one
+INSERT INTO audio_playback_speed (user_id, media_item_id, speed)
+VALUES ($1, $2, $3)
+ON CONFLICT (user_id, media_item_id)
+DO UPDATE SET speed = EXCLUDED.speed, updated_at = NOW()
+RETURNING speed
+`
+
+type UpsertAudioPlaybackSpeedParams struct {
+	UserID      pgtype.UUID `db:"user_id" json:"user_id"`
+	MediaItemID pgtype.UUID `db:"media_item_id" json:"media_item_id"`
+	Speed       float32     `db:"speed" json:"speed"`
+}
+
+func (q *Queries) UpsertAudioPlaybackSpeed(ctx context.Context, arg UpsertAudioPlaybackSpeedParams) (float32, error) {
+	row := q.db.QueryRow(ctx, UpsertAudioPlaybackSpeed, arg.UserID, arg.MediaItemID, arg.Speed)
+	var speed float32
+	err := row.Scan(&speed)
+	return speed, err
+}
+
 const UpsertDashboardPreferences = `-- name: UpsertDashboardPreferences :one
 INSERT INTO user_dashboard_preferences (user_id, library_id, hidden_collections, collection_order, items_per_section)
 VALUES ($1, $2, $3, $4, $5)

internal/database/queries/queries.sql

@@ -28,6 +28,7 @@ SELECT
     u.created_at,
     u.updated_at,
     u.timezone,
+    u.default_audio_speed,
     (SELECT COUNT(*) FROM devices WHERE user_id = u.id) as device_count
 FROM users u
 WHERE u.id = $1;
@@ -511,6 +512,22 @@ RETURNING id, email, username, role;
 -- name: UpdateUserTimezone :exec
 UPDATE users SET timezone = $2, updated_at = NOW() WHERE id = $1;
 
+-- name: UpdateUserDefaultAudioSpeed :exec
+UPDATE users SET default_audio_speed = $2, updated_at = NOW() WHERE id = $1;
+
+-- Per-book playback speed preference (player plan §8).
+
+-- name: GetAudioPlaybackSpeed :one
+SELECT speed FROM audio_playback_speed
+WHERE user_id = $1 AND media_item_id = $2;
+
+-- name: UpsertAudioPlaybackSpeed :one
+INSERT INTO audio_playback_speed (user_id, media_item_id, speed)
+VALUES ($1, $2, $3)
+ON CONFLICT (user_id, media_item_id)
+DO UPDATE SET speed = EXCLUDED.speed, updated_at = NOW()
+RETURNING speed;
+
 -- name: GetSystemTimezone :one
 SELECT setting_value FROM system_settings WHERE setting_key = 'default_timezone';
 

internal/handlers/auth.go

@@ -11,6 +11,7 @@ import (
 	"errors"
 	"fmt"
 	"html/template"
+	"math"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -120,6 +121,8 @@ type UserProfile struct {
 	LastName  string `json:"last_name"`
 	Role      string `json:"role"`
 	Theme     string `json:"theme,omitempty"`
+	// User-level default audiobook playback speed (plan §8); 0 omits.
+	DefaultAudioSpeed float64 `json:"default_audio_speed,omitempty"`
 }
 
 type UpdateProfileRequest struct {
@@ -129,6 +132,9 @@ type UpdateProfileRequest struct {
 	LastName  string `json:"last_name,omitempty" form:"last_name" validate:"omitempty,max=100"`
 	Theme     string `json:"theme,omitempty" form:"theme" validate:"omitempty"`
 	Timezone  string `json:"timezone,omitempty" form:"timezone" validate:"omitempty"`
+	// Per the SPEEDS list bounds; the profile select always sends it,
+	// JSON clients omit it (0 = untouched).
+	DefaultAudioSpeed float64 `json:"default_audio_speed,omitempty" form:"default_audio_speed" validate:"omitempty,min=0.25,max=4"`
 }
 
 type AdminUpdateUserRequest struct {
@@ -139,6 +145,8 @@ type AdminUpdateUserRequest struct {
 	Theme     string `json:"theme,omitempty" form:"theme" validate:"omitempty"`
 	Timezone  string `json:"timezone,omitempty" form:"timezone" validate:"omitempty"`
 	Role      string `json:"role,omitempty" form:"role" validate:"omitempty,oneof=user admin"`
+	// Same semantics as UpdateProfileRequest.DefaultAudioSpeed.
+	DefaultAudioSpeed float64 `json:"default_audio_speed,omitempty" form:"default_audio_speed" validate:"omitempty,min=0.25,max=4"`
 }
 
 // Register handles POST /api/auth/register
@@ -545,6 +553,7 @@ func (h *AuthHandler) GetProfile(c *echo.Context) error {
 		LastName:          lastName,
 		Role:              user.Role,
 		Theme:             user.Theme.String,
+		DefaultAudioSpeed: float64(user.DefaultAudioSpeed),
 	})
 }
 
@@ -693,6 +702,22 @@ func (h *AuthHandler) UpdateProfile(c *echo.Context) error {
 		}
 	}
 
+	// Update the default audiobook playback speed (plan §8). The form
+	// select always sends it; JSON clients that omit it decode as 0 and
+	// leave the column untouched.
+	if req.DefaultAudioSpeed != 0 {
+		if req.DefaultAudioSpeed < 0.25 || req.DefaultAudioSpeed > 4 || math.IsNaN(req.DefaultAudioSpeed) || math.IsInf(req.DefaultAudioSpeed, 0) {
+			return c.JSON(http.StatusBadRequest, map[string]string{"error": "default playback speed out of range"})
+		}
+		err := h.db.UpdateUserDefaultAudioSpeed(c.Request().Context(), database.UpdateUserDefaultAudioSpeedParams{
+			ID:                targetUserUUID,
+			DefaultAudioSpeed: float32(req.DefaultAudioSpeed),
+		})
+		if err != nil {
+			return c.JSON(http.StatusInternalServerError, map[string]string{"error": err.Error()})
+		}
+	}
+
 	// Browser path (htmx modal + profile page): refresh so every rendered
 	// value (timezone select, table rows, header) reflects the save and the
 	// modal closes. A bare JSON body swapped into #profile-result read as

internal/handlers/media.go

@@ -12,6 +12,7 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"math"
 	"mime/multipart"
 	"net/http"
 	"net/url"
@@ -2990,6 +2991,30 @@ func (mh *MediaHandler) GetAudioChapters(c *echo.Context) error {
 		})
 	}
 
+	// Playback speed (plan §8): resolve per-book row → user default →
+	// 1.0 IN the payload so the player applies it with zero extra round
+	// trips; default_playback_speed powers the dropdown's "(default)"
+	// marker. Speed is a preference, so this rides the authenticated
+	// user — anonymous readers just get 1.0.
+	playbackSpeed, defaultSpeed := 1.0, 1.0
+	if userID, ok := c.Get("user_id").(string); ok {
+		if userUUID, err := uuid.Parse(userID); err == nil {
+			userRow, err := mh.db.GetUser(c.Request().Context(), pgtype.UUID{Bytes: userUUID, Valid: true})
+			if err == nil && userRow.DefaultAudioSpeed > 0 {
+				defaultSpeed = float64(userRow.DefaultAudioSpeed)
+			}
+			bookSpeed, err := mh.db.GetAudioPlaybackSpeed(c.Request().Context(), database.GetAudioPlaybackSpeedParams{
+				UserID:      pgtype.UUID{Bytes: userUUID, Valid: true},
+				MediaItemID: pgtype.UUID{Bytes: mediaUUID, Valid: true},
+			})
+			if err == nil && bookSpeed > 0 {
+				playbackSpeed = float64(bookSpeed)
+			} else {
+				playbackSpeed = defaultSpeed
+			}
+		}
+	}
+
 	return c.JSON(http.StatusOK, map[string]interface{}{
 		"media_item_id":          item.ID,
 		"chapters":               payload.Chapters,
@@ -2997,9 +3022,65 @@ func (mh *MediaHandler) GetAudioChapters(c *echo.Context) error {
 		"codec_profile":          payload.CodecProfile,
 		"layout":                 payload.Layout,
 		"tracks":                 tracks,
+		"playback_speed":         playbackSpeed,
+		"default_playback_speed": defaultSpeed,
 	})
 }
 
+// SetAudioSpeed handles PUT /api/media-items/:id/audio-speed — the
+// per-user per-book playback speed upsert (plan §8). The client SPEEDS
+// list is the real gate; the server sanity-checks the range.
+func (mh *MediaHandler) SetAudioSpeed(c *echo.Context) error {	mediaID := c.Param("id")
+	mediaUUID, err := uuid.Parse(mediaID)
+	if err != nil {
+		return c.JSON(http.StatusBadRequest, map[string]string{"error": "invalid media item id"})
+	}
+	userID, ok := c.Get("user_id").(string)
+	if !ok || userID == "" {
+		return c.JSON(http.StatusUnauthorized, map[string]string{"error": "authentication required"})
+	}
+	userUUID, err := uuid.Parse(userID)
+	if err != nil {
+		return c.JSON(http.StatusUnauthorized, map[string]string{"error": "invalid user"})
+	}
+
+	var req struct {
+		Speed float64 `json:"speed"`
+	}
+	if err := c.Bind(&req); err != nil {
+		return c.JSON(http.StatusBadRequest, map[string]string{"error": "invalid request"})
+	}
+	if req.Speed < 0.25 || req.Speed > 4 || math.IsNaN(req.Speed) || math.IsInf(req.Speed, 0) {
+		return c.JSON(http.StatusBadRequest, map[string]string{"error": "speed out of range"})
+	}
+
+	// The book must exist (and be visible): a preference for a hidden
+	// library must not be writable — family-lens rule.
+	item, err := mh.db.GetMediaItem(c.Request().Context(), pgtype.UUID{Bytes: mediaUUID, Valid: true})
+	if err != nil {
+		return c.JSON(http.StatusNotFound, map[string]string{"error": "book not found"})
+	}
+	if item.LibraryID.Valid {
+		visibleSet, _, err := mh.visibleLibrarySet(c)
+		if err != nil {
+			return c.JSON(http.StatusInternalServerError, map[string]string{"error": "failed to check library access"})
+		}
+		if !visibleSet[uuid.UUID(item.LibraryID.Bytes).String()] {
+			return c.JSON(http.StatusForbidden, map[string]string{"error": "library not accessible"})
+		}
+	}
+
+	speed, err := mh.db.UpsertAudioPlaybackSpeed(c.Request().Context(), database.UpsertAudioPlaybackSpeedParams{
+		UserID:      pgtype.UUID{Bytes: userUUID, Valid: true},
+		MediaItemID: pgtype.UUID{Bytes: mediaUUID, Valid: true},
+		Speed:       float32(req.Speed),
+	})
+	if err != nil {
+		return c.JSON(http.StatusInternalServerError, map[string]string{"error": "failed to save playback speed"})
+	}
+	return c.JSON(http.StatusOK, map[string]float64{"playback_speed": float64(speed)})
+}
+
 // GetAudioTrack handles GET /api/media-items/:id/audio/:trackIndex — the
 // per-track byte stream for multi-file audiobooks (folder books serve the
 // real file; zip books extract the entry in place). Library visibility is

internal/router/helpers.go

@@ -66,6 +66,7 @@ func getTemplateUserWithTheme(c *echo.Context, cfg *Config) (templates.User, err
 		FirstName:         utils.PgTextString(userDB.FirstName),
 		LastName:          utils.PgTextString(userDB.LastName),
 		CreatedAt:         userDB.CreatedAt.Time,
+		DefaultAudioSpeed: float64(userDB.DefaultAudioSpeed),
 	}, nil
 }
 

internal/router/media.go

@@ -22,6 +22,7 @@ func registerMediaRoutes(cfg *Config) {
 	// books stream through the existing /uploads Range-serving path;
 	// multi-file books additionally expose per-track streaming.
 	protected.GET("/media-items/:id/chapters", cfg.MediaHandler.GetAudioChapters)
+	protected.PUT("/media-items/:id/audio-speed", cfg.MediaHandler.SetAudioSpeed)
 	protected.GET("/media-items/:id/audio/:trackIndex", cfg.MediaHandler.GetAudioTrack)
 
 	// Media rating routes (all authenticated users)

templates/audio_reader.templ

@@ -403,9 +403,19 @@ templ AudioReader(user User, metadata ReaderMetadata) {
 								class="w-full text-left px-3 py-1.5 rounded-md text-sm"
 								:class="Number(speed) === rate ? 'font-semibold' : ''"
 								:style="Number(speed) === rate ? 'background-color: var(--accent-muted); color: var(--text-primary);' : 'color: var(--text-secondary);'"
-								x-text="rate + '×'"
+								x-text="rate + '×' + (isDefaultSpeed(rate) ? ' · default' : '')"
 							></button>
 						</template>
+						<!-- §8: pin the current rate as the user default —
+						     books without their own speed pick it up -->
+						<button
+							type="button"
+							x-show="!isDefaultSpeed(speed)"
+							@click="setDefaultSpeed(speed); speedOpen = false"
+							class="w-full text-left px-3 py-1.5 mt-1 rounded-md text-xs border-t"
+							style="border-color: var(--border); color: var(--text-secondary);"
+							x-text="'Make ' + speed + '× my default'"
+						></button>
 					</div>
 				</div>
 				<button

templates/audio_reader_templ.go

@@ -194,7 +194,7 @@ func AudioReader(user User, metadata ReaderMetadata) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 15, "</h1><p class=\"text-sm mt-0.5 truncate\" style=\"color: var(--text-secondary);\" x-text=\"chapterTitle()\">—</p></div></div><!-- Scrubber + transports --><div class=\"w-full max-w-xl flex flex-col gap-2\"><div class=\"flex items-center gap-2 text-xs tabular-nums\" style=\"color: var(--text-secondary);\"><span class=\"inline-block min-w-[4.75rem]\" x-text=\"fmtTime(scrubbing ? scrubValue : currentTime)\">0:00</span><div id=\"scrub-area\" class=\"relative flex-1 h-6 flex items-center cursor-pointer\" style=\"touch-action: none;\" @pointerdown=\"scrubPointerDown($event)\" @pointermove=\"scrubPointerMove($event)\" @pointerup=\"scrubPointerUp($event)\" @pointercancel=\"scrubPointerUp($event)\" @pointerleave=\"scrubPointerLeave()\" @wheel.prevent=\"onScrubWheel($event)\"><!-- Base track --><div class=\"absolute inset-x-0 top-1/2 -translate-y-1/2 h-1.5 rounded-full pointer-events-none\" style=\"background-color: var(--surface-hover);\"></div><!-- Elapsed fill --><div class=\"absolute top-1/2 -translate-y-1/2 h-1.5 rounded-full pointer-events-none\" :style=\"'left:0;width:' + scrubFillPct() + '%;background-color:var(--accent);'\"></div><!-- Buffered span: the ACTIVE track's element buffer only --><template x-if=\"bufferSpan()\"><div class=\"absolute top-1/2 -translate-y-1/2 h-1.5 rounded-full pointer-events-none\" :style=\"'left:' + bufferSpan().left + '%;width:' + bufferSpan().width + '%;background-color:var(--accent-muted);'\"></div></template><!-- Chapter ticks: density-decimated, current chapter tinted --><div id=\"scrub-ticks\" class=\"absolute inset-0 pointer-events-none\"><template x-for=\"idx in tickIndices\" :key=\"'tick' + idx\"><div class=\"absolute top-1/2 -translate-x-1/2 -translate-y-1/2 h-2 w-0.5 rounded-full\" :class=\"currentChapterIdx === idx ? 'opacity-100' : 'opacity-40'\" :style=\"'left:' + (chapters[idx].start / (chaptersDuration() || 1) * 100) + '%;background-color:' + (currentChapterIdx === idx ? 'var(--accent)' : 'var(--text-secondary)') + ';'\"></div></template></div><!-- §9 magnet: the line a click would land on (hover\n\t\t\t\t\t\t     inside the pixel radius locks the tooltip here) --><div x-show=\"hoverSnapped && !scrubbing\" x-cloak class=\"absolute top-1/2 -translate-x-1/2 -translate-y-1/2 h-4 w-px rounded-full pointer-events-none\" :style=\"'left:' + hoverPct + '%;background-color:var(--accent);'\"></div><input id=\"audio-scrub\" type=\"range\" min=\"0\" step=\"0.1\" :max=\"chaptersDuration() || 1\" :value=\"scrubbing ? scrubValue : currentTime\" class=\"relative w-full\" @input=\"scrubbing = true; scrubValue = Number($event.target.value)\" @change=\"seekTo(scrubValue); scrubbing = false\" aria-label=\"Seek position\"><!-- Hover tooltip: time + chapter under the pointer --><div x-show=\"hoverSeconds !== null && !scrubbing\" x-cloak class=\"absolute bottom-full mb-1 -translate-x-1/2 whitespace-nowrap rounded-md px-2 py-1 text-[11px] shadow-lg pointer-events-none\" :style=\"'left:' + hoverPct + '%;background-color:var(--bg-secondary);border:1px solid var(--border);color:var(--text-primary);'\"><span x-text=\"hoverSeconds !== null ? fmtTime(hoverSeconds) : ''\"></span> <span style=\"color: var(--text-secondary);\" x-text=\"hoverSeconds !== null ? ' — ' + chapterTitleAt(hoverSeconds) : ''\"></span></div><!-- Precision rail (§9): Shift+drag on mouse, or a touch\n\t\t\t\t\t\t     drag pulled off the bar — ±5 min or tighter, free\n\t\t\t\t\t\t     mapping inside. Edge labels self-document the window\n\t\t\t\t\t\t     (floats over the transports, page never shifts) --><div x-show=\"railVisible\" x-cloak class=\"absolute top-full mt-1 inset-x-0 h-12 rounded-lg shadow-lg p-1.5 pointer-events-none\" :style=\"'background-color: var(--bg-secondary); border: 1px solid var(--border); z-index: 30;' + (railLiftY ? ' transform: translateY(' + railLiftY + 'px);' : '')\"><div class=\"relative h-full\"><div class=\"absolute inset-x-0 top-1/2 h-px\" style=\"background-color: var(--border);\"></div><template x-for=\"tick in railTickList\" :key=\"'rtick' + tick.start\"><div class=\"absolute top-1 bottom-1 w-px\" :style=\"'left:' + ((tick.start - railFrom) / Math.max(1, railTo - railFrom) * 100) + '%;background-color:var(--text-secondary);opacity:0.5;'\"></div></template><div class=\"absolute top-0 bottom-0 w-0.5 -translate-x-1/2 rounded-full\" :style=\"'left:' + railMarkerPct() + '%;background-color:var(--accent);'\"></div><div class=\"absolute left-1 top-0.5 text-[10px] tabular-nums whitespace-nowrap\" style=\"color: var(--text-primary);\" x-text=\"fmtTime(scrubValue) + ' — ' + chapterTitleAt(scrubValue)\"></div><div class=\"absolute left-1 bottom-0.5 text-[9px] tabular-nums\" style=\"color: var(--text-secondary);\" x-text=\"fmtTime(railFrom)\"></div><div class=\"absolute right-1 bottom-0.5 text-[9px] tabular-nums\" style=\"color: var(--text-secondary);\" x-text=\"fmtTime(railTo)\"></div></div></div></div><button typeLine truncated
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 15, "</h1><p class=\"text-sm mt-0.5 truncate\" style=\"color: var(--text-secondary);\" x-text=\"chapterTitle()\">—</p></div></div><!-- Scrubber + transports --><div class=\"w-full max-w-xl flex flex-col gap-2\"><div class=\"flex items-center gap-2 text-xs tabular-nums\" style=\"color: var(--text-secondary);\"><span class=\"inline-block min-w-[4.75rem]\" x-text=\"fmtTime(scrubbing ? scrubValue : currentTime)\">0:00</span><div id=\"scrub-area\" class=\"relative flex-1 h-6 flex items-center cursor-pointer\" style=\"touch-action: none;\" @pointerdown=\"scrubPointerDown($event)\" @pointermove=\"scrubPointerMove($event)\" @pointerup=\"scrubPointerUp($event)\" @pointercancel=\"scrubPointerUp($event)\" @pointerleave=\"scrubPointerLeave()\" @wheel.prevent=\"onScrubWheel($event)\"><!-- Base track --><div class=\"absolute inset-x-0 top-1/2 -translate-y-1/2 h-1.5 rounded-full pointer-events-none\" style=\"background-color: var(--surface-hover);\"></div><!-- Elapsed fill --><div class=\"absolute top-1/2 -translate-y-1/2 h-1.5 rounded-full pointer-events-none\" :style=\"'left:0;width:' + scrubFillPct() + '%;background-color:var(--accent);'\"></div><!-- Buffered span: the ACTIVE track's element buffer only --><template x-if=\"bufferSpan()\"><div class=\"absolute top-1/2 -translate-y-1/2 h-1.5 rounded-full pointer-events-none\" :style=\"'left:' + bufferSpan().left + '%;width:' + bufferSpan().width + '%;background-color:var(--accent-muted);'\"></div></template><!-- Chapter ticks: density-decimated, current chapter tinted --><div id=\"scrub-ticks\" class=\"absolute inset-0 pointer-events-none\"><template x-for=\"idx in tickIndices\" :key=\"'tick' + idx\"><div class=\"absolute top-1/2 -translate-x-1/2 -translate-y-1/2 h-2 w-0.5 rounded-full\" :class=\"currentChapterIdx === idx ? 'opacity-100' : 'opacity-40'\" :style=\"'left:' + (chapters[idx].start / (chaptersDuration() || 1) * 100) + '%;background-color:' + (currentChapterIdx === idx ? 'var(--accent)' : 'var(--text-secondary)') + ';'\"></div></template></div><!-- §9 magnet: the line a click would land on (hover\n\t\t\t\t\t\t     inside the pixel radius locks the tooltip here) --><div x-show=\"hoverSnapped && !scrubbing\" x-cloak class=\"absolute top-1/2 -translate-x-1/2 -translate-y-1/2 h-4 w-px rounded-full pointer-events-none\" :style=\"'left:' + hoverPct + '%;background-color:var(--accent);'\"></div><input id=\"audio-scrub\" type=\"range\" min=\"0\" step=\"0.1\" :max=\"chaptersDuration() || 1\" :value=\"scrubbing ? scrubValue : currentTime\" class=\"relative w-full\" @input=\"scrubbing = true; scrubValue = Number($event.target.value)\" @change=\"seekTo(scrubValue); scrubbing = false\" aria-label=\"Seek position\"><!-- Hover tooltip: time + chapter under the pointer --><div x-show=\"hoverSeconds !== null && !scrubbing\" x-cloak class=\"absolute bottom-full mb-1 -translate-x-1/2 whitespace-nowrap rounded-md px-2 py-1 text-[11px] shadow-lg pointer-events-none\" :style=\"'left:' + hoverPct + '%;background-color:var(--bg-secondary);border:1px solid var(--border);color:var(--text-primary);'\"><span x-text=\"hoverSeconds !== null ? fmtTime(hoverSeconds) : ''\"></span> <span style=\"color: var(--text-secondary);\" x-text=\"hoverSeconds !== null ? ' — ' + chapterTitleAt(hoverSeconds) : ''\"></span></div><!-- Precision rail (§9): Shift+drag on mouse, or a touch\n\t\t\t\t\t\t     drag pulled off the bar — ±5 min or tighter, free\n\t\t\t\t\t\t     mapping inside. Edge labels self-document the window\n\t\t\t\t\t\t     (floats over the transports, page never shifts) --><div x-show=\"railVisible\" x-cloak class=\"absolute top-full mt-1 inset-x-0 h-12 rounded-lg shadow-lg p-1.5 pointer-events-none\" :style=\"'background-color: var(--bg-secondary); border: 1px solid var(--border); z-index: 30;' + (railLiftY ? ' transform: translateY(' + railLiftY + 'px);' : '')\"><div class=\"relative h-full\"><div class=\"absolute inset-x-0 top-1/2 h-px\" style=\"background-color: var(--border);\"></div><template x-for=\"tick in railTickList\" :key=\"'rtick' + tick.start\"><div class=\"absolute top-1 bottom-1 w-px\" :style=\"'left:' + ((tick.start - railFrom) / Math.max(1, railTo - railFrom) * 100) + '%;background-color:var(--text-secondary);opacity:0.5;'\"></div></template><div class=\"absolute top-0 bottom-0 w-0.5 -translate-x-1/2 rounded-full\" :style=\"'left:' + railMarkerPct() + '%;background-color:var(--accent);'\"></div><div class=\"absolute left-1 top-0.5 text-[10px] tabular-nums whitespace-nowrap\" style=\"color: var(--text-primary);\" x-text=\"fmtTime(scrubValue) + ' — ' + chapterTitleAt(scrubValue)\"></div><div class=\"absolute left-1 bottom-0.5 text-[9px] tabular-nums\" style=\"color: var(--text-secondary);\" x-text=\"fmtTime(railFrom)\"></div><div class=\"absolute right-1 bottom-0.5 text-[9px] tabular-nums\" style=\"color: var(--text-secondary);\" x-text=\"fmtTime(railTo)\"></div></div></div></div><button typeLine truncated
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}

templates/profile_form.templ

@@ -1,5 +1,15 @@
 package templates
 
+import "fmt"
+
+// effectiveAudioSpeed renders 0 (unset) as 1× — the schema default.
+func effectiveAudioSpeed(user User) float64 {
+	if user.DefaultAudioSpeed == 0 {
+		return 1
+	}
+	return user.DefaultAudioSpeed
+}
+
 templ ProfileForm(user User, actionURL string, requireCurrentPassword bool, showRoleField bool, showCancelButton bool) {
 	<form
 		hx-put={ actionURL }
@@ -66,6 +76,17 @@ templ ProfileForm(user User, actionURL string, requireCurrentPassword bool, show
 						<option value="material-dark" selected?={ user.Theme == "material-dark" }>Material Dark</option>
 					</select>
 				</div>
+				<div>
+					<label class="block text-xs font-semibold uppercase tracking-wide mb-1.5" style="color: var(--text-secondary)">Default Playback Speed</label>
+					<select
+						name="default_audio_speed"
+						class="input"
+					>
+						for _, rate := range SpeedOptions {
+							<option value={ fmt.Sprintf("%g", rate) } selected?={ effectiveAudioSpeed(user) == rate }>{ fmt.Sprintf("%g", rate) }×</option>
+						}
+					</select>
+				</div>
 				<div>
 					<label class="block text-xs font-semibold uppercase tracking-wide mb-1.5" style="color: var(--text-secondary)">Timezone</label>
 					<select
@@ -125,7 +146,6 @@ templ ProfileForm(user User, actionURL string, requireCurrentPassword bool, show
 							type="password"
 							name="current_password"
 							class="input"
-							required
 						/>
 					</div>
 					<div>

templates/profile_form_templ.go

@@ -8,6 +8,16 @@ package templates
 import "github.com/a-h/templ"
 import templruntime "github.com/a-h/templ/runtime"
 
+import "fmt"
+
+// effectiveAudioSpeed renders 0 (unset) as 1× — the schema default.
+func effectiveAudioSpeed(user User) float64 {
+	if user.DefaultAudioSpeed == 0 {
+		return 1
+	}
+	return user.DefaultAudioSpeed
+}
+
 func ProfileForm(user User, actionURL string, requireCurrentPassword bool, showRoleField bool, showCancelButton bool) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
@@ -36,7 +46,7 @@ func ProfileForm(user User, actionURL string, requireCurrentPassword bool, showR
 		var templ_7745c5c3_Var2 string
 		templ_7745c5c3_Var2, templ_7745c5c3_Err = templ.ResolveAttributeValue(actionURL)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/profile_form.templ`, Line: 5, Col: 20}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/profile_form.templ`, Line: 15, Col: 20}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var2)
 		if templ_7745c5c3_Err != nil {
@@ -57,7 +67,7 @@ func ProfileForm(user User, actionURL string, requireCurrentPassword bool, showR
 		var templ_7745c5c3_Var3 string
 		templ_7745c5c3_Var3, templ_7745c5c3_Err = templ.ResolveAttributeValue(user.Username)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/profile_form.templ`, Line: 21, Col: 27}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/profile_form.templ`, Line: 31, Col: 27}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var3)
 		if templ_7745c5c3_Err != nil {
@@ -70,7 +80,7 @@ func ProfileForm(user User, actionURL string, requireCurrentPassword bool, showR
 		var templ_7745c5c3_Var4 string
 		templ_7745c5c3_Var4, templ_7745c5c3_Err = templ.ResolveAttributeValue(user.Email)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/profile_form.templ`, Line: 30, Col: 24}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/profile_form.templ`, Line: 40, Col: 24}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var4)
 		if templ_7745c5c3_Err != nil {
@@ -83,7 +93,7 @@ func ProfileForm(user User, actionURL string, requireCurrentPassword bool, showR
 		var templ_7745c5c3_Var5 string
 		templ_7745c5c3_Var5, templ_7745c5c3_Err = templ.ResolveAttributeValue(user.FirstName)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/profile_form.templ`, Line: 39, Col: 28}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/profile_form.templ`, Line: 49, Col: 28}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var5)
 		if templ_7745c5c3_Err != nil {
@@ -96,7 +106,7 @@ func ProfileForm(user User, actionURL string, requireCurrentPassword bool, showR
 		var templ_7745c5c3_Var6 string
 		templ_7745c5c3_Var6, templ_7745c5c3_Err = templ.ResolveAttributeValue(user.LastName)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/profile_form.templ`, Line: 49, Col: 27}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/profile_form.templ`, Line: 59, Col: 27}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var6)
 		if templ_7745c5c3_Err != nil {
@@ -172,277 +182,323 @@ func ProfileForm(user User, actionURL string, requireCurrentPassword bool, showR
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 21, ">Material Dark</option></select></div><div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">Timezone</label> <select name=\"timezone\" class=\"input\"><option value=\"UTC\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 21, ">Material Dark</option></select></div><div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">Default Playback Speed</label> <select name=\"default_audio_speed\" class=\"input\">")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "UTC" {
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 22, " selected")
+		for _, rate := range SpeedOptions {
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 22, "<option value=\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
+			var templ_7745c5c3_Var7 string
+			templ_7745c5c3_Var7, templ_7745c5c3_Err = templ.ResolveAttributeValue(fmt.Sprintf("%g", rate))
+			if templ_7745c5c3_Err != nil {
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/profile_form.templ`, Line: 86, Col: 46}
 			}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 23, ">UTC (UTC+0)</option> <option value=\"Pacific/Honolulu\"")
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var7)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-		if user.Timezone == "Pacific/Honolulu" {
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 23, "\"")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			if effectiveAudioSpeed(user) == rate {
 				templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 24, " selected")
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
 			}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 25, ">Hawaii (UTC-10)</option> <option value=\"America/Anchorage\"")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 25, ">")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-		if user.Timezone == "America/Anchorage" {
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 26, " selected")
+			var templ_7745c5c3_Var8 string
+			templ_7745c5c3_Var8, templ_7745c5c3_Err = templ.JoinStringErrs(fmt.Sprintf("%g", rate))
+			if templ_7745c5c3_Err != nil {
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/profile_form.templ`, Line: 86, Col: 122}
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var8))
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 26, "×</option>")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 27, ">Alaska (UTC-9/-8)</option> <option value=\"America/Los_Angeles\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 27, "</select></div><div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">Timezone</label> <select name=\"timezone\" class=\"input\"><option value=\"UTC\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "America/Los_Angeles" {
+		if user.Timezone == "UTC" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 28, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 29, ">Pacific (UTC-8/-7)</option> <option value=\"America/Denver\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 29, ">UTC (UTC+0)</option> <option value=\"Pacific/Honolulu\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "America/Denver" {
+		if user.Timezone == "Pacific/Honolulu" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 30, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 31, ">Mountain (UTC-7/-6)</option> <option value=\"America/Phoenix\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 31, ">Hawaii (UTC-10)</option> <option value=\"America/Anchorage\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "America/Phoenix" {
+		if user.Timezone == "America/Anchorage" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 32, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 33, ">Mountain - no DST (UTC-7)</option> <option value=\"America/Chicago\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 33, ">Alaska (UTC-9/-8)</option> <option value=\"America/Los_Angeles\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "America/Chicago" {
+		if user.Timezone == "America/Los_Angeles" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 34, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 35, ">Central (UTC-6/-5)</option> <option value=\"America/New_York\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 35, ">Pacific (UTC-8/-7)</option> <option value=\"America/Denver\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "America/New_York" {
+		if user.Timezone == "America/Denver" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 36, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 37, ">Eastern (UTC-5/-4)</option> <option value=\"America/Sao_Paulo\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 37, ">Mountain (UTC-7/-6)</option> <option value=\"America/Phoenix\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "America/Sao_Paulo" {
+		if user.Timezone == "America/Phoenix" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 38, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 39, ">Brasilia (UTC-3/-2)</option> <option value=\"Europe/London\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 39, ">Mountain - no DST (UTC-7)</option> <option value=\"America/Chicago\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Europe/London" {
+		if user.Timezone == "America/Chicago" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 40, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 41, ">British (UTC+0/+1)</option> <option value=\"Europe/Paris\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 41, ">Central (UTC-6/-5)</option> <option value=\"America/New_York\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Europe/Paris" {
+		if user.Timezone == "America/New_York" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 42, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 43, ">Central European (UTC+1/+2)</option> <option value=\"Europe/Helsinki\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 43, ">Eastern (UTC-5/-4)</option> <option value=\"America/Sao_Paulo\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Europe/Helsinki" {
+		if user.Timezone == "America/Sao_Paulo" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 44, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 45, ">Eastern European (UTC+2/+3)</option> <option value=\"Europe/Moscow\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 45, ">Brasilia (UTC-3/-2)</option> <option value=\"Europe/London\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Europe/Moscow" {
+		if user.Timezone == "Europe/London" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 46, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 47, ">Moscow (UTC+3)</option> <option value=\"Asia/Tehran\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 47, ">British (UTC+0/+1)</option> <option value=\"Europe/Paris\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Asia/Tehran" {
+		if user.Timezone == "Europe/Paris" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 48, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 49, ">Iran (UTC+3:30)</option> <option value=\"Asia/Dubai\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 49, ">Central European (UTC+1/+2)</option> <option value=\"Europe/Helsinki\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Asia/Dubai" {
+		if user.Timezone == "Europe/Helsinki" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 50, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 51, ">Gulf (UTC+4)</option> <option value=\"Asia/Karachi\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 51, ">Eastern European (UTC+2/+3)</option> <option value=\"Europe/Moscow\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Asia/Karachi" {
+		if user.Timezone == "Europe/Moscow" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 52, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 53, ">Pakistan (UTC+5)</option> <option value=\"Asia/Kolkata\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 53, ">Moscow (UTC+3)</option> <option value=\"Asia/Tehran\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Asia/Kolkata" {
+		if user.Timezone == "Asia/Tehran" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 54, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 55, ">India (UTC+5:30)</option> <option value=\"Asia/Dhaka\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 55, ">Iran (UTC+3:30)</option> <option value=\"Asia/Dubai\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Asia/Dhaka" {
+		if user.Timezone == "Asia/Dubai" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 56, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 57, ">Bangladesh (UTC+6)</option> <option value=\"Asia/Bangkok\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 57, ">Gulf (UTC+4)</option> <option value=\"Asia/Karachi\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Asia/Bangkok" {
+		if user.Timezone == "Asia/Karachi" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 58, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 59, ">Indochina (UTC+7)</option> <option value=\"Asia/Shanghai\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 59, ">Pakistan (UTC+5)</option> <option value=\"Asia/Kolkata\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Asia/Shanghai" {
+		if user.Timezone == "Asia/Kolkata" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 60, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 61, ">China (UTC+8)</option> <option value=\"Asia/Tokyo\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 61, ">India (UTC+5:30)</option> <option value=\"Asia/Dhaka\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Asia/Tokyo" {
+		if user.Timezone == "Asia/Dhaka" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 62, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 63, ">Japan/Korea (UTC+9)</option> <option value=\"Australia/Darwin\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 63, ">Bangladesh (UTC+6)</option> <option value=\"Asia/Bangkok\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Australia/Darwin" {
+		if user.Timezone == "Asia/Bangkok" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 64, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 65, ">Australian Central (UTC+9:30)</option> <option value=\"Australia/Sydney\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 65, ">Indochina (UTC+7)</option> <option value=\"Asia/Shanghai\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Australia/Sydney" {
+		if user.Timezone == "Asia/Shanghai" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 66, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 67, ">Australian Eastern (UTC+10/+11)</option> <option value=\"Pacific/Auckland\"")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 67, ">China (UTC+8)</option> <option value=\"Asia/Tokyo\"")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if user.Timezone == "Pacific/Auckland" {
+		if user.Timezone == "Asia/Tokyo" {
 			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 68, " selected")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 69, ">New Zealand (UTC+12/+13)</option></select></div>")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 69, ">Japan/Korea (UTC+9)</option> <option value=\"Australia/Darwin\"")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		if user.Timezone == "Australia/Darwin" {
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 70, " selected")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+		}
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 71, ">Australian Central (UTC+9:30)</option> <option value=\"Australia/Sydney\"")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		if user.Timezone == "Australia/Sydney" {
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 72, " selected")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+		}
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 73, ">Australian Eastern (UTC+10/+11)</option> <option value=\"Pacific/Auckland\"")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		if user.Timezone == "Pacific/Auckland" {
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 74, " selected")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+		}
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 75, ">New Zealand (UTC+12/+13)</option></select></div>")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
 		if showRoleField {
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 70, "<div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">Role</label> <select name=\"role\" class=\"input\"><option value=\"user\"")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 76, "<div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">Role</label> <select name=\"role\" class=\"input\"><option value=\"user\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 			if user.Role == "user" {
-				templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 71, " selected")
+				templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 77, " selected")
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
 			}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 72, ">User</option> <option value=\"admin\"")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 78, ">User</option> <option value=\"admin\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 			if user.Role == "admin" {
-				templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 73, " selected")
+				templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 79, " selected")
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
 			}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 74, ">Admin</option></select></div>")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 80, ">Admin</option></select></div>")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 75, "</div></div><div x-data=\"profilePasswordForm\"><div class=\"flex items-center gap-2 mb-4\">")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 81, "</div></div><div x-data=\"profilePasswordForm\"><div class=\"flex items-center gap-2 mb-4\">")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
@@ -450,12 +506,12 @@ func ProfileForm(user User, actionURL string, requireCurrentPassword bool, showR
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 76, "<h3 class=\"text-lg font-semibold\" style=\"color: var(--text-primary)\">Change Password</h3></div>")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 82, "<h3 class=\"text-lg font-semibold\" style=\"color: var(--text-primary)\">Change Password</h3></div>")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
 		if requireCurrentPassword {
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 77, "<div class=\"space-y-4 max-w-md\"><div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">Current Password</label> <input type=\"password\" name=\"current_password\" class=\"input\" required></div><div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">New Password</label> <input type=\"password\" id=\"new-password\" name=\"new_password\" class=\"input\"></div><div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">Confirm New Password</label> <input type=\"password\" id=\"confirm-password\" name=\"confirm_password\" class=\"input\"></div><div id=\"password-requirements\" class=\"text-xs\"></div><button type=\"button\" id=\"password-submit-btn\" hx-put=\"/api/auth/password\" hx-target=\"#password-result\" hx-swap=\"innerHTML\" hx-include=\"closest form\" class=\"btn btn-primary\">")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 83, "<div class=\"space-y-4 max-w-md\"><div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">Current Password</label> <input type=\"password\" name=\"current_password\" class=\"input\"></div><div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">New Password</label> <input type=\"password\" id=\"new-password\" name=\"new_password\" class=\"input\"></div><div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">Confirm New Password</label> <input type=\"password\" id=\"confirm-password\" name=\"confirm_password\" class=\"input\"></div><div id=\"password-requirements\" class=\"text-xs\"></div><button type=\"button\" id=\"password-submit-btn\" hx-put=\"/api/auth/password\" hx-target=\"#password-result\" hx-swap=\"innerHTML\" hx-include=\"closest form\" class=\"btn btn-primary\">")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
@@ -463,25 +519,25 @@ func ProfileForm(user User, actionURL string, requireCurrentPassword bool, showR
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 78, "Update Password</button><div id=\"password-result\" class=\"mt-2\"></div></div>")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 84, "Update Password</button><div id=\"password-result\" class=\"mt-2\"></div></div>")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		} else {
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 79, "<p class=\"text-sm italic mb-4\" style=\"color: var(--text-secondary);\">As an admin, you can change this user's password without knowing their current password.</p><div class=\"space-y-4 max-w-md\"><div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">New Password</label> <input type=\"password\" id=\"new-password\" name=\"new_password\" class=\"input\"></div><div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">Confirm New Password</label> <input type=\"password\" id=\"confirm-password\" name=\"confirm_password\" class=\"input\"></div><div id=\"password-requirements\" class=\"text-xs\"></div><button type=\"button\" id=\"password-submit-btn\" hx-put=\"")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 85, "<p class=\"text-sm italic mb-4\" style=\"color: var(--text-secondary);\">As an admin, you can change this user's password without knowing their current password.</p><div class=\"space-y-4 max-w-md\"><div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">New Password</label> <input type=\"password\" id=\"new-password\" name=\"new_password\" class=\"input\"></div><div><label class=\"block text-xs font-semibold uppercase tracking-wide mb-1.5\" style=\"color: var(--text-secondary)\">Confirm New Password</label> <input type=\"password\" id=\"confirm-password\" name=\"confirm_password\" class=\"input\"></div><div id=\"password-requirements\" class=\"text-xs\"></div><button type=\"button\" id=\"password-submit-btn\" hx-put=\"")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			var templ_7745c5c3_Var7 string
-			templ_7745c5c3_Var7, templ_7745c5c3_Err = templ.ResolveAttributeValue("/api/auth/password/" + user.ID)
+			var templ_7745c5c3_Var9 string
+			templ_7745c5c3_Var9, templ_7745c5c3_Err = templ.ResolveAttributeValue("/api/auth/password/" + user.ID)
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/profile_form.templ`, Line: 191, Col: 46}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `templates/profile_form.templ`, Line: 211, Col: 46}
 			}
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var7)
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ_7745c5c3_Var9)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 80, "\" hx-target=\"#password-result\" hx-swap=\"innerHTML\" hx-include=\"closest form\" class=\"btn btn-primary\">")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 86, "\" hx-target=\"#password-result\" hx-swap=\"innerHTML\" hx-include=\"closest form\" class=\"btn btn-primary\">")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
@@ -489,22 +545,22 @@ func ProfileForm(user User, actionURL string, requireCurrentPassword bool, showR
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 81, "Reset Password</button><div id=\"password-result\" class=\"mt-2\"></div></div>")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 87, "Reset Password</button><div id=\"password-result\" class=\"mt-2\"></div></div>")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 82, "</div><div class=\"flex justify-end gap-3 pt-6 border-t\" style=\"border-color: var(--border);\">")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 88, "</div><div class=\"flex justify-end gap-3 pt-6 border-t\" style=\"border-color: var(--border);\">")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
 		if showCancelButton {
-			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 83, "<button type=\"button\" @click=\"closeProfileModal()\" class=\"btn btn-secondary\">Cancel</button> ")
+			templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 89, "<button type=\"button\" @click=\"closeProfileModal()\" class=\"btn btn-secondary\">Cancel</button> ")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 84, "<button type=\"submit\" class=\"btn btn-primary\">")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 90, "<button type=\"submit\" class=\"btn btn-primary\">")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
@@ -512,7 +568,7 @@ func ProfileForm(user User, actionURL string, requireCurrentPassword bool, showR
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 85, "Save Changes</button></div><div id=\"profile-result\" class=\"mt-2\"></div></form>")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 91, "Save Changes</button></div><div id=\"profile-result\" class=\"mt-2\"></div></form>")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}

templates/types.go

@@ -17,8 +17,15 @@ type User struct {
 	CreatedAt time.Time
 	Token     string
 	Timezone  string
+	// User-level default audiobook playback speed (plan §8); 0 means
+	// "unset" and renders as the 1× option.
+	DefaultAudioSpeed float64
 }
 
+// SpeedOption is one entry of the default-playback-speed select — the
+// server-side mirror of the web player's SPEEDS list (plan §5/§8).
+var SpeedOptions = []float64{0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.5, 3}
+
 type PageData struct {
 	User        User
 	CurrentPage string

web/src/audio.ts

@@ -196,6 +196,9 @@ Alpine.data("audioReader", () => ({
   currentTime: 0,
   playing: false,
   speed: normalizeSpeed(localStorage.getItem("audio_speed")),
+  // User-level default speed (plan §8): powers the dropdown's
+  // "(default)" marker; hydrated from the chapters payload.
+  defaultSpeed: 1,
   // Exposed for the templ dropdown's x-for — templ cannot import the
   // const directly; this property is the binding.
   speeds: SPEEDS,
@@ -501,6 +504,17 @@ Alpine.data("audioReader", () => ({
         const data = await chaptersResp.json();
         this.chapters = (data.chapters || []) as AudioChapter[];
         this.bookDuration = data.duration_seconds || this.chapterEndEstimate();
+        // §8: the server owns speed — per-book row, else the user's
+        // default. localStorage stays only as a first-paint cache; the
+        // payload value wins over it BEFORE the rate is (re)applied to
+        // the element below.
+        const serverSpeed = Number(data.playback_speed);
+        if (SPEEDS.includes(serverSpeed)) {
+          this.speed = serverSpeed;
+          localStorage.setItem("audio_speed", String(serverSpeed));
+        }
+        const serverDefault = Number(data.default_playback_speed);
+        if (SPEEDS.includes(serverDefault)) this.defaultSpeed = serverDefault;
         this.buildTracks(data);
         this.recomputeTicks();
         const audio = this.audio();
@@ -624,6 +638,39 @@ Alpine.data("audioReader", () => ({
     localStorage.setItem("audio_speed", String(rate));
     const audio = this.audio();
     if (audio) audio.playbackRate = rate;
+    // §8: the per-book speed lives server-side (localStorage is only a
+    // first-paint cache). Fire-and-forget; a failure toasts — the rate
+    // still applies to this session.
+    fetch(`/api/media-items/${this.mediaItemId}/audio-speed`, {
+      method: "PUT",
+      headers: { ...getAuthHeaders(), "content-type": "application/json" },
+      body: JSON.stringify({ speed: rate }),
+    })
+      .then((r) => {
+        if (!r.ok) throw new Error(String(r.status));
+      })
+      .catch(() => showToast("Speed saved for this session only — server rejected it", "error"));
+  },
+
+  // setDefaultSpeed pins a user-level default (plan §8): books without
+  // their own per-book speed pick it up. Rides the profile endpoint,
+  // same as the profile-page select.
+  setDefaultSpeed(rate: number) {
+    fetch("/api/auth/profile", {
+      method: "PUT",
+      headers: { ...getAuthHeaders(), "content-type": "application/json" },
+      body: JSON.stringify({ default_audio_speed: rate }),
+    })
+      .then((r) => {
+        if (!r.ok) throw new Error(String(r.status));
+        this.defaultSpeed = rate;
+        showToast(`Default playback speed set to ${rate}×`, "success");
+      })
+      .catch(() => showToast("Default speed not saved", "error"));
+  },
+
+  isDefaultSpeed(rate: number): boolean {
+    return Number(this.defaultSpeed) === rate;
   },
 
   setSkip(seconds: number) {