fix(translations): stay on page

README.md

@@ -91,4 +91,3 @@ To optimize images before uploading to Nextcloud:
 ```bash
 convert input.png -resize 3000 -quality 80 output.webp
 ```
-

internal/components/gallery/controller.go

@@ -2,6 +2,7 @@ package gallery
 
 import (
 	"context"
+	"log/slog"
 	"math"
 
 	"github.com/InfinityTools/go-binpack2d"
@@ -19,16 +20,16 @@ type Set struct {
 }
 
 func (s *Service) GetGallerySet(ctx context.Context) (gallerySet Set, err error) {
-	gallerySet.SM, err = s.GetGallery(ctx, 50)
+	gallerySet.SM, err = s.getGallery(ctx, 50)
 	if err != nil {
 		return
 	}
-	gallerySet.LG, err = s.GetGallery(ctx, 80)
+	gallerySet.LG, err = s.getGallery(ctx, 80)
 	if err != nil {
 		return
 	}
 
-	gallerySet.XLG, err = s.GetGallery(ctx, 120)
+	gallerySet.XLG, err = s.getGallery(ctx, 120)
 	if err != nil {
 		return
 	}
@@ -36,18 +37,23 @@ func (s *Service) GetGallerySet(ctx context.Context) (gallerySet Set, err error)
 	return
 }
 
-func (s *Service) GetGallery(ctx context.Context, width int) (gallery Gallery, err error) {
+func (s *Service) getGallery(ctx context.Context, width int) (gallery Gallery, err error) {
 	imgs, err := s.GetImages(ctx)
 	if err != nil {
 		return
 	}
 
-	packer := binpack2d.Create(width, 999999)
+	packer := binpack2d.Create(width, math.MaxInt)
 
 	for len(imgs) > 0 {
 		unused := make([]Image, 0, len(imgs))
 		for _, img := range imgs {
-			adjustImageSize(&img, 200)
+			adjustImageSizeStrictRatio(&img, 200)
+			if img.Height == 0 || img.Width == 0 {
+				slog.Warn("image has invalid size", "img", img)
+				continue
+			}
+
 			rect, ok := packer.Insert(img.Width, img.Height, binpack2d.RULE_BEST_SHORT_SIDE_FIT)
 			if !ok {
 				unused = append(unused, img)
@@ -70,17 +76,50 @@ func (s *Service) GetGallery(ctx context.Context, width int) (gallery Gallery, e
 	return
 }
 
-// adjustImageSize adjusts the image size so that the aspect ratio stays the same
-// but the image area is the given parameter.
-func adjustImageSize(img *Image, area int) {
-	// Calculate the original aspect ratio (W / H)
-	aspectRatio := float64(img.Width) / float64(img.Height)
+// getCleanRatio returns the simplified aspect ratio as (numerator, denominator).
+// It searches for the best fit within a denominator limit to account for rounding errors.
+func getCleanRatio(width, height int) (int, int) {
+	targetRatio := float64(width) / float64(height)
+	const maxDenominator = 100
 
-	// Calculate new height and width using the derived formulas
-	newHeight := math.Sqrt(float64(area) / aspectRatio)
-	newWidth := newHeight * aspectRatio
+	bestN, bestD := 0, 1
+	minDiff := math.MaxFloat64
 
-	// Round to the nearest integer to minimize precision loss
-	img.Width = int(math.Round(newWidth))
-	img.Height = int(math.Round(newHeight))
+	for d := 1; d <= maxDenominator; d++ {
+		// Calculate the closest numerator for this denominator
+		n := int(math.Round(float64(d) * targetRatio))
+
+		// Calculate the difference
+		currentRatio := float64(n) / float64(d)
+		diff := math.Abs(currentRatio - targetRatio)
+
+		// Keep track of the one with the smallest error
+		if diff < minDiff {
+			minDiff = diff
+			bestN, bestD = n, d
+		}
+	}
+
+	return bestN, bestD
+}
+
+func adjustImageSizeStrictRatio(img *Image, targetArea int) {
+	baseW, baseH := getCleanRatio(img.Width, img.Height)
+
+	baseArea := baseW * baseH
+
+	idealK := math.Sqrt(float64(targetArea) / float64(baseArea))
+
+	k := int(math.Floor(idealK))
+
+	if math.Abs(float64(k*k*baseArea-targetArea)) >
+		math.Abs(float64(int(math.Ceil(idealK))*int(math.Ceil(idealK))*baseArea-targetArea)) {
+		k = int(math.Ceil(idealK))
+	}
+
+	slog.Debug("adslkfj", "k", k, "idealK", idealK, "baseH", baseH, "baseW", baseW, "imgW", img.Width, "imgH", img.Height)
+
+	// 5. Apply the scaled dimensions (guarantees perfect aspect ratio)
+	img.Width = baseW * k
+	img.Height = baseH * k
 }

internal/components/gallery/image.go

@@ -11,6 +11,8 @@ import (
 	"strings"
 	"time"
 
+	"git.schreifuchs.ch/schreifuchs/schreifuchs.ch/internal/components/images"
+	"git.schreifuchs.ch/schreifuchs/schreifuchs.ch/internal/handlers/rest"
 	"github.com/valkey-io/valkey-go"
 )
 
@@ -22,6 +24,10 @@ type Image struct {
 	Height int
 }
 
+func (i Image) URL() string {
+	return images.URLFromUID(i.UID)
+}
+
 const (
 	imagesKey = "gallery:images:list"
 	hashKey   = "gallery:images:hash"
@@ -45,7 +51,6 @@ func (s *Service) assembleImageList(ctx context.Context) error {
 	if err != nil {
 		return fmt.Errorf("could not read contents of %s: %w", s.cfg.Path, err)
 	}
-	slog.Debug("loaded files", "files", files)
 
 	savedHash, _ := s.cache.Do(ctx, s.cache.B().Get().Key(hashKey).Build()).AsBytes()
 
@@ -77,10 +82,19 @@ func (s *Service) assembleImageList(ctx context.Context) error {
 			continue
 		}
 
+		w := img.Bounds().Dx()
+		h := img.Bounds().Dy()
+
+		// FIX 2: Defensive check to guard against unreadable/corrupted image boundaries
+		if w <= 0 || h <= 0 {
+			slog.Warn("skipping image with zero or negative dimensions", "path", imagePath, "w", w, "h", h)
+			continue
+		}
+
 		imgs = append(imgs, Image{
 			UID:    uid,
-			Width:  img.Bounds().Dx(),
-			Height: img.Bounds().Dy(),
+			Width:  w,
+			Height: h,
 		})
 	}
 
@@ -111,3 +125,32 @@ func (s *Service) GetImages(ctx context.Context) (images []Image, err error) {
 	err = s.cache.Do(ctx, s.cache.B().Get().Key(imagesKey).Build()).DecodeJSON(&images)
 	return
 }
+
+func (s *Service) GetPrevAndNext(ctx context.Context, uid string) (previous *Image, next *Image, err error) {
+	imgs, err := s.GetImages(ctx)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	for i := range imgs {
+		if imgs[i].UID != uid {
+			continue
+		}
+
+		if i > 0 {
+			prevImg := imgs[i-1]
+			previous = &prevImg
+		}
+		if i+1 < len(imgs) {
+			nextImg := imgs[i+1]
+			next = &nextImg
+		}
+
+		return previous, next, nil
+	}
+
+	return nil, nil, &rest.Error{
+		Type:    rest.ErrorTypeNotFound,
+		Message: "could not find image with uid",
+	}
+}

internal/components/images/helpers.go

@@ -33,6 +33,11 @@ func UIDFromPath(path string) (uid string, err error) {
 
 func URLFromPath(path string) (url string, err error) {
 	uid, err := UIDFromPath(path)
+	url = URLFromUID(uid)
+	return
+}
+
+func URLFromUID(uid string) (url string) {
 	url = "/images/" + uid
 	return
 }

internal/components/translate/context.go

@@ -53,13 +53,21 @@ func Path(ctx context.Context, pp ...string) string {
 }
 
 func PathForLang(ctx context.Context, lang string, pp ...string) string {
+	slog.Debug("computing path for lang", "pp", pp, "lang", lang)
 	s, ok := ctx.Value(serviceKey).(*Service)
 	if !ok {
 		slog.Error("could not extract translation service from context for translating path", "ctx", ctx, "path", pp)
 		return path.Join(pp...)
 	}
 
+	// remove leading ""
+	for len(pp) > 0 && pp[0] == "" {
+		pp = pp[1:]
+	}
+
 	if len(pp) > 0 {
+
+		slog.Debug("computing path for lang", "pp", pp, "lang", lang, "pp[0]", pp[0], "translations", s.translations)
 		if _, ok := s.translations[pp[0]]; ok {
 			pp = pp[1:]
 		}

internal/handlers/restgallery/controller.go

@@ -1,18 +1,45 @@
 package restgallery
 
 import (
+	"fmt"
 	"log/slog"
 	"net/http"
 
+	"git.schreifuchs.ch/schreifuchs/schreifuchs.ch/internal/handlers/rest"
+	"git.schreifuchs.ch/schreifuchs/schreifuchs.ch/internal/pkg/templer"
 	"git.schreifuchs.ch/schreifuchs/schreifuchs.ch/web/pages"
 )
 
+const preloadCount = 6
+
 func (h *Handler) gallery(w http.ResponseWriter, r *http.Request) {
 	imgs, err := h.srv.GetGallerySet(r.Context())
 	if err != nil {
-		slog.Error("could not get images", "err", err)
-		w.WriteHeader(http.StatusInternalServerError)
+		slog.Error("could not get gallery set", "err", err)
+		rest.SendErr(w, err)
 		return
 	}
-	h.r.Render(r.Context(), w, r, pages.GallerySet(imgs))
+	ctx := r.Context()
+	for i, image := range imgs.LG.Images {
+		if i > preloadCount {
+			break
+		}
+		ctx = templer.AppendHeader(ctx, fmt.Sprintf(`<link rel="preload" href="%s?w=800" as="image" />`, image.URL()))
+	}
+
+	h.r.Render(ctx, w, r, pages.GallerySet(imgs))
+}
+
+func (h *Handler) image(w http.ResponseWriter, r *http.Request) {
+	uid := r.PathValue("image_uid")
+
+	slog.Debug("image from gallery", "uid", uid)
+	prev, next, err := h.srv.GetPrevAndNext(r.Context(), uid)
+	if err != nil {
+		slog.Error("could not get gallery", "err", err)
+		rest.SendErr(w, err)
+		return
+	}
+
+	h.r.Render(r.Context(), w, r, pages.GalleryImage(uid, next, prev))
 }

internal/handlers/restgallery/resource.go

@@ -28,12 +28,16 @@ func New(renderer renderer, srv galleryService, cfg *config.Gallery) *Handler {
 		cfg:     cfg,
 	}
 
-	mux.HandleFunc(fmt.Sprintf("GET /%s", url.PathEscape(cfg.Path)), h.gallery)
+	galleryPath := url.PathEscape(cfg.Path)
+
+	mux.HandleFunc(fmt.Sprintf("GET /%s/{image_uid}", galleryPath), h.image)
+	mux.HandleFunc(fmt.Sprintf("GET /%s", galleryPath), h.gallery)
 	return h
 }
 
 type galleryService interface {
 	GetGallerySet(ctx context.Context) (gallerySet gallery.Set, err error)
+	GetPrevAndNext(ctx context.Context, uid string) (previous *gallery.Image, next *gallery.Image, err error)
 }
 type renderer interface {
 	Render(ctx context.Context, w io.Writer, r *http.Request, component templ.Component)

internal/pkg/filesystem/cached_client_test.go

@@ -150,7 +150,7 @@ func TestCachedClient_Stat(t *testing.T) {
 	mockFS := NewMockFS()
 	mockFS.AddFile("/test.txt", []byte("hello"))
 
-	c := NewCachedClient(mockFS, client, time.Hour)
+	c := NewCachedClient(mockFS, client, time.Hour, time.Hour*2)
 
 	// First call: Cache miss
 	info, err := c.Stat("/test.txt")
@@ -209,7 +209,7 @@ func TestCachedClient_Read(t *testing.T) {
 	content := []byte("hello world")
 	mockFS.AddFile("/read.txt", content)
 
-	c := NewCachedClient(mockFS, client, time.Hour)
+	c := NewCachedClient(mockFS, client, time.Hour, time.Hour*2)
 
 	// First call: Miss
 	data, err := c.Read("/read.txt")
@@ -257,7 +257,7 @@ func TestCachedClient_ReadDir(t *testing.T) {
 	mockFS.AddFile("/dir/f1.txt", []byte("1"))
 	mockFS.AddFile("/dir/f2.txt", []byte("2"))
 
-	c := NewCachedClient(mockFS, client, time.Hour)
+	c := NewCachedClient(mockFS, client, time.Hour, time.Hour*2)
 
 	// First call: Miss
 	infos, err := c.ReadDir("/dir")
@@ -303,7 +303,7 @@ func TestCachedClient_RevalidateStat(t *testing.T) {
 	mockFS := NewMockFS()
 	mockFS.AddFile("/reval.txt", []byte("initial"))
 
-	c := NewCachedClient(mockFS, client, time.Hour)
+	c := NewCachedClient(mockFS, client, time.Hour, time.Hour*2)
 
 	// Populate cache
 	_, _ = c.Stat("/reval.txt")
@@ -381,7 +381,7 @@ func TestCachedClient_RevalidateRead(t *testing.T) {
 	mockFS := NewMockFS()
 	mockFS.AddFile("/read_reval.txt", []byte("initial"))
 
-	c := NewCachedClient(mockFS, client, time.Hour)
+	c := NewCachedClient(mockFS, client, time.Hour, time.Hour*2)
 
 	// Populate cache
 	_, _ = c.Read("/read_reval.txt")
@@ -431,7 +431,7 @@ func TestCachedClient_RevalidateReadDir(t *testing.T) {
 	mockFS.AddDir("/dir_reval")
 	mockFS.AddFile("/dir_reval/f1.txt", []byte("1"))
 
-	c := NewCachedClient(mockFS, client, time.Hour)
+	c := NewCachedClient(mockFS, client, time.Hour, time.Hour*2)
 
 	// Populate cache
 	_, err = c.ReadDir("/dir_reval")
@@ -461,4 +461,3 @@ func TestCachedClient_RevalidateReadDir(t *testing.T) {
 		t.Errorf("expected 1 hit, got %d", c.hits.Load())
 	}
 }
-

internal/pkg/templer/middleware.go

@@ -2,8 +2,10 @@ package templer
 
 import (
 	"context"
+	"fmt"
 	"log/slog"
 	"net/http"
+	"net/url"
 	"strings"
 )
 
@@ -25,12 +27,38 @@ func Middleware(next http.Handler) http.HandlerFunc {
 	}
 }
 
-// Path returns the current path without a leading slash
+// Path returns the current path with a leading slash
 func Path(ctx context.Context) string {
 	path, ok := ctx.Value(pathKey).(string)
 	if !ok {
 		slog.Error("could not extract request path from context")
 		return ""
 	}
-	return strings.TrimPrefix(path, "/")
+	return path
+}
+
+func RelativePath(ctx context.Context, relPath string) (path string, err error) {
+	baseStr := Path(ctx)
+
+	if baseStr != "" && !strings.HasSuffix(baseStr, "/") {
+		baseStr += "/"
+	}
+
+	base, err := url.Parse(baseStr)
+	if err != nil {
+		err = fmt.Errorf("could not parse base path: %w", err)
+		return
+	}
+	rel, err := url.Parse(relPath)
+	if err != nil {
+		err = fmt.Errorf("could not parse relative path: %w", err)
+		return
+	}
+
+	// Resolve the relative path against the base
+	path = base.ResolveReference(rel).Path
+	if strings.HasSuffix(path, "/") {
+		path = path[:len(path)-1]
+	}
+	return
 }

internal/pkg/templer/middleware_test.go

@@ -0,0 +1,75 @@
+package templer
+
+import (
+	"context"
+	"testing"
+)
+
+func TestRelativePath(t *testing.T) {
+	tests := []struct {
+		name string // description of this test case
+		// Named input parameters for target function.
+		base    string
+		relPath string
+		want    string
+		wantErr bool
+	}{
+		// TODO: Add test cases.
+		{
+			name:    "with no relative path stays the same",
+			base:    "/foo/bar",
+			relPath: "",
+			want:    "/foo/bar",
+			wantErr: false,
+		},
+		{
+			name:    "with . relative path stays the same",
+			base:    "/foo/bar",
+			relPath: ".",
+			want:    "/foo/bar",
+			wantErr: false,
+		},
+		{
+			name:    "with ./ relative path stays the same",
+			base:    "/foo/bar",
+			relPath: "./",
+			want:    "/foo/bar",
+			wantErr: false,
+		},
+
+		{
+			name:    "with .. relative path goes one up",
+			base:    "/foo/bar",
+			relPath: "..",
+			want:    "/foo",
+			wantErr: false,
+		},
+
+		{
+			name:    "with ../baz relative path replaces last element with baz",
+			base:    "/foo/bar",
+			relPath: "../baz",
+			want:    "/foo/baz",
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ctx := context.WithValue(t.Context(), pathKey, tt.base)
+			got, gotErr := RelativePath(ctx, tt.relPath)
+			if gotErr != nil {
+				if !tt.wantErr {
+					t.Errorf("RelativePath() failed: %v", gotErr)
+				}
+				return
+			}
+			if tt.wantErr {
+				t.Fatal("RelativePath() succeeded unexpectedly")
+			}
+			// TODO: update the condition below to compare got with tt.want.
+			if got != tt.want {
+				t.Errorf("RelativePath() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

internal/server/factory.go

@@ -3,7 +3,6 @@ package server
 import (
 	"fmt"
 	"net/http"
-	"path"
 	"time"
 
 	"git.schreifuchs.ch/schreifuchs/schreifuchs.ch/internal/components/gallery"
@@ -78,7 +77,9 @@ func (s *Server) dynamicRoutes() (h http.Handler, err error) {
 		func() http.Handler {
 			mux := http.NewServeMux()
 
-			mux.Handle(path.Join("/"+s.cfg.Gallery.Path), restgallery.New(renderer, gallery.New(fs, s.cfg.Gallery, imageSrv, valkeyClient), s.cfg.Gallery))
+			galleryMux := restgallery.New(renderer, gallery.New(fs, s.cfg.Gallery, imageSrv, valkeyClient), s.cfg.Gallery)
+			mux.Handle("/"+s.cfg.Gallery.Path, galleryMux)
+			mux.Handle("/"+s.cfg.Gallery.Path+"/", galleryMux)
 			mux.Handle("/", resthome.New(renderer, page.New(fs)))
 
 			return mux

web/components/hello.templ

@@ -1,5 +0,0 @@
-package components
-
-templ Hello() {
-	<h1>Hello World</h1>
-}

web/components/modal.templ

@@ -0,0 +1,27 @@
+package components
+
+// Modal renders a modal dialog.
+//
+// The <dialog> itself must never be an htmx swap target: swapping its
+// innerHTML would replace the wrapper below (centering + close button) and
+// break the layout. Content is swapped into the inner element with id
+// "<id>-content" instead.
+templ Modal(id string) {
+	<dialog
+		id={ id }
+		class="m-auto backdrop:bg-black/90 bg-transparent p-0 w-full h-full max-w-none max-h-none"
+		hx-on::after-swap="if (!this.open) this.showModal()"
+	>
+		<div class="relative w-full h-full flex items-center justify-center overflow-hidden">
+			<button
+				class="absolute right-5 top-5 z-10 p-2 text-white"
+				hx-on:click="this.closest('dialog').close()"
+			>
+				X
+			</button>
+			<div id={ id + "-content" } class="w-full h-full flex items-center justify-center overflow-hidden">
+				{ children... }
+			</div>
+		</div>
+	</dialog>
+}

web/layouts/base.templ

@@ -7,7 +7,7 @@ import (
 	"strings"
 )
 
-templ Head(cfg config.Cfg, title string) {
+templ head(cfg config.Cfg, title string) {
 	<head>
 		<meta charset="UTF-8"/>
 		<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
@@ -29,8 +29,23 @@ templ Head(cfg config.Cfg, title string) {
 templ Base(cfg config.Cfg, title string) {
 	<!DOCTYPE html>
 	<html lang={ translate.Language(ctx) }>
-		@Head(cfg, title)
-		<body class="bg-black dark" hx-boost="true" hx-target="main" hx-ext="head-support,preload,preload-links">
+		@head(cfg, title)
+		<body class="bg-black dark" hx-boost="true" hx-target="body" hx-ext="head-support,preload,preload-links">
+			@body() {
+				{ children... }
+			}
+		</body>
+	</html>
+}
+
+templ Content(cfg config.Cfg, title string) {
+	@head(cfg, title)
+	@body() {
+		{ children... }
+	}
+}
+
+templ body() {
 	<header
 		class="fixed z-50 mix-blend-difference p-1 w-full flex justify-between items-start"
 	>
@@ -52,6 +67,4 @@ templ Base(cfg config.Cfg, title string) {
 	<main class="text-white">
 		{ children... }
 	</main>
-		</body>
-	</html>
 }

web/layouts/render.go

@@ -36,7 +36,7 @@ func (l *Layouts) Render(ctx context.Context, w io.Writer, r *http.Request, comp
 		component = Base(l.cfg, title)
 	} else {
 		ctx = templ.WithChildren(ctx, component)
-		component = Head(l.cfg, title)
+		component = Content(l.cfg, title)
 	}
 
 	if err := component.Render(ctx, w); err != nil {

web/pages/gallery.templ

@@ -3,30 +3,100 @@ package pages
 import (
 	"fmt"
 	"git.schreifuchs.ch/schreifuchs/schreifuchs.ch/internal/components/gallery"
+	"git.schreifuchs.ch/schreifuchs/schreifuchs.ch/internal/pkg/templer"
+	"git.schreifuchs.ch/schreifuchs/schreifuchs.ch/web/components"
 )
 
+const detailsID = "imgs-details"
+
+// detailsContentID is the inner element of the modal that htmx swaps into.
+// It is defined by components.Modal and must not be the dialog itself.
+const detailsContentID = detailsID + "-content"
+
 templ GallerySet(g gallery.Set) {
+	<div class="p-5">
+		@components.Modal(detailsID) {
+			// Placeholder: only visible until the first image is swapped in.
+			// prev/next are nil because relative links would be resolved
+			// against the gallery index, not the image page.
+			if len(g.SM.Images) > 0 {
+				@GalleryImage(g.SM.Images[0].UID, nil, nil)
+			}
+		}
 		<div
-		class="grid gap-5 grid-cols-1 lg:hidden m-5"
+			class="grid gap-5 grid-cols-1 lg:hidden"
 		>
 			for _,img := range g.SM.Images {
+				<button
+					hx-get={ templer.RelativePath(ctx, "./"+img.UID) }
+					hx-target={ "#" + detailsContentID }
+					hx-swap="innerHTML"
+					class="block w-full cursor-pointer"
+				>
 					<img
 						src={ "/images/" + img.UID + "?w=600" }
 						loading="lazy"
 						class="w-full"
 						alt="Gallery item"
 					/>
+				</button>
 			}
 		</div>
-	<div class="hidden lg:block 3xl:hidden m-5">
+		<div class="hidden lg:block 3xl:hidden">
 			@Gallery(g.SM)
 		</div>
-	<div class="hidden 3xl:block 6xl:hidden m-5">
+		<div class="hidden 3xl:block 6xl:hidden">
 			@Gallery(g.LG)
 		</div>
-	<div class="hidden 6xl:block m-5">
+		<div class="hidden 6xl:block">
 			@Gallery(g.XLG)
 		</div>
+	</div>
+}
+
+// Define a templ script to hold complex post-load behavior
+templ GalleryImage(image string, next *gallery.Image, prev *gallery.Image) {
+	<link rel="preload" href={ "/images/" + image + "?w=800" } as="image"/>
+	<div class="relative w-10/12 h-10/12 flex items-center justify-center overflow-hidden ">
+		<!-- 1. Preloaded Base Image (w=800) -->
+		<img
+			src={ "/images/" + image + "?w=800" }
+			alt=""
+			class="absolute inset-0 w-full h-full object-contain"
+		/>
+		<!-- 2. Responsive Image Layer (Overlaid on top) -->
+		<img
+			src={ "/images/" + image + "?w=800" }
+			srcset={ "/images/" + image + "?w=400 400w, /images/" + image + "?w=800 800w, /images/" + image + "?w=1200 1200w, /images/" + image + "?w=1600 1600w" }
+			sizes="(max-width: 600px) 400px, (max-width: 1200px) 800px, 1200px"
+			alt="Image description"
+			onload="this.decode().then(() => {this.classList.remove('opacity-0')}).catch(() => {})"
+			class="absolute inset-0 w-full h-full object-contain transition-opacity duration-900 opacity-0"
+		/>
+		<!-- 3. Navigation Controls -->
+		if prev != nil {
+			<button
+				hx-get={ templer.RelativePath(ctx, "../"+prev.UID) }
+				hx-target={ "#" + detailsContentID }
+				hx-swap="innerHTML"
+				preload
+				class="absolute left-4 top-1/2 -translate-y-1/2 z-10 p-2 text-white"
+			>
+				&lt;
+			</button>
+		}
+		if next != nil {
+			<button
+				hx-get={ templer.RelativePath(ctx, "../"+next.UID) }
+				hx-target={ "#" + detailsContentID }
+				hx-swap="innerHTML"
+				preload="mouseover"
+				class="absolute right-4 top-1/2 -translate-y-1/2 z-10 p-2 text-white"
+			>
+				&gt;
+			</button>
+		}
+	</div>
 }
 
 templ Gallery(g gallery.Gallery) {
@@ -38,6 +108,11 @@ templ Gallery(g gallery.Gallery) {
 			<div
 				style={ fmt.Sprintf("grid-column: %d / span %d; grid-row: %d / span %d;aspect-ratio: %d / %d;", img.X+1, img.Width, img.Y+1, img.Height, img.Width, img.Height) }
 				class="overflow-hidden shadow-sm"
+			>
+				<button
+					hx-get={ templer.RelativePath(ctx, "./"+img.UID) }
+					hx-target={ "#" + detailsContentID }
+					hx-swap="innerHTML"
 				>
 					<img
 						src={ "/images/" + img.UID + "?w=800" }
@@ -45,6 +120,7 @@ templ Gallery(g gallery.Gallery) {
 						class="w-full h-full object-cover"
 						alt="Gallery item"
 					/>
+				</button>
 			</div>
 		}
 	</div>

web/static/css/output.css

@@ -1,2 +1,2 @@
 /*! tailwindcss v4.1.18 | MIT License | https://tailwindcss.com */
-@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-font-weight:initial;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-text-shadow-color:initial;--tw-text-shadow-alpha:100%}}}@layer theme{:root,:host{--font-sans:"Outfit","outfit",sans-serif;--font-mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier 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50%,transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components{.prose img{max-height:90vh;margin-left:auto;margin-right:auto;display:block}}@layer utilities{.pointer-events-none{pointer-events:none}.absolute{position:absolute}.fixed{positLine truncated
+@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-translate-x:0;--tw-translate-y:0;--tw-translate-z:0;--tw-font-weight:initial;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-duration:initial;--tw-text-shadow-color:initial;--tw-text-shadow-alpha:100%}}}@layer theme{:root,:host{--font-sans:"Outfit","outfit",sans-serif;--font-mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier 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optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab,currentcolor 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components{.prose img{max-height:90vh;margin-left:auto;margin-right:auto;display:block}}@layer utilities{.pLine truncated