fix: update reader service and handler

- Add panel_layout to getDefaultSettings() for dockable panels
- Remove template rendering from ShowReader (router handles SSR)
- Fix pgtype.Int4 marshaling to JSON (no explicit int conversion)
- Remove unused strings import from handlers

internal/handlers/reader.go

@@ -8,7 +8,6 @@ import (
 	"net/http"
 	"os"
 	"strconv"
-	"strings"
 
 	"github.com/google/uuid"
 	"github.com/jackc/pgx/v5"
@@ -99,26 +98,6 @@ func (h *ReaderHandler) ShowReader(c echo.Context) error {
 		UserID:      userData.ID,
 	})
 
-	// Prepare metadata
-	metadata := ReaderMetadata{
-		MediaItemID:    mediaItemID,
-		Title:          mediaItem.Title,
-		Author:         textToString(mediaItem.Author),
-		CoverImagePath: textToString(mediaItem.CoverImagePath),
-		LibraryType:    mediaItem.FormatGroup,
-		MimeType:       textToString(mediaItem.MimeType),
-		FilePath:       mediaItem.FilePath,
-		TotalPages:     int(mediaItem.PageCount),
-		ChapterCount:   int(mediaItem.ChapterCount),
-	}
-
-	// Render template
-	var buf strings.Builder
-	err = templates.Reader(userData, metadata, progress, bookmarks).Render(c.Request().Context(), &buf)
-	if err != nil {
-		return c.JSON(http.StatusInternalServerError, map[string]string{"error": "Failed to render reader"})
-	}
-
 	// Return JSON response instead of rendering template
 	return c.JSON(http.StatusOK, map[string]interface{}{
 		"media_item_id":    mediaItemID,
@@ -128,8 +107,8 @@ func (h *ReaderHandler) ShowReader(c echo.Context) error {
 		"library_type":     mediaItem.FormatGroup,
 		"mime_type":        textToString(mediaItem.MimeType),
 		"file_path":        mediaItem.FilePath,
-		"total_pages":      int(mediaItem.PageCount),
+		"total_pages":      mediaItem.PageCount,
-		"chapter_count":    int(mediaItem.ChapterCount),
+		"chapter_count":    mediaItem.ChapterCount,
 		"progress":         progress,
 		"bookmarks":        bookmarks,
 	})

internal/services/reader.go

@@ -402,5 +402,14 @@ func (s *ReaderService) getDefaultSettings() map[string]interface{} {
 		"tap_zone_size":      30,
 		"auto_scroll":        false,
 		"panel_zoom_enabled": true,
+
+		// Dockable panel defaults
+		"panel_layout": map[string]interface{}{
+			"toc":                map[string]interface{}{"side": "left", "visible": true, "collapsed": false, "width_px": 320, "order": 1, "locked": false, "last_valid_side": "left"},
+			"settings":           map[string]interface{}{"side": "left", "visible": false, "collapsed": true, "width_px": 380, "order": 2, "locked": false, "last_valid_side": "left"},
+			"navigator":          map[string]interface{}{"side": "right", "visible": true, "collapsed": false, "width_px": 200, "order": 1, "locked": false, "last_valid_side": "right"},
+			"bookmarks":          map[string]interface{}{"side": "right", "visible": false, "collapsed": true, "width_px": 280, "order": 2, "locked": false, "last_valid_side": "right"},
+			"mobile_nav_visible": false,
+		},
 	}
 }