fix: refine fullscreen photo overlay

src/client/app.ts

@@ -32,6 +32,7 @@ let scheduledRenderTimer = null;
 let scheduledRenderOptions = { fitMap: false };
 let lastRenderAt = 0;
 const SHARE_PARAM_NAME = "share";
+let overlayMapView = null;
 
 const map = L.map("map", { zoomControl: true }).setView([52.5208, 13.4095], 13);
 const lightMapLayer = L.tileLayer("https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}{r}.png", {
@@ -248,6 +249,27 @@ function setMapTheme(theme) {
   });
 }
 
+function captureMapView() {
+  const center = map.getCenter();
+  return {
+    center: [center.lat, center.lng],
+    zoom: map.getZoom()
+  };
+}
+
+function rememberOverlayMapView() {
+  overlayMapView = captureMapView();
+}
+
+function restoreOverlayMapView() {
+  if (!overlayMapView) {
+    return;
+  }
+
+  map.setView(overlayMapView.center, overlayMapView.zoom, { animate: false });
+  overlayMapView = null;
+}
+
 function setRouteVisible(visible) {
   routeVisible = Boolean(visible);
   localStorage.setItem(ROUTE_VISIBLE_STORAGE_KEY, routeVisible ? "true" : "false");
@@ -494,6 +516,7 @@ function closeOverlayView() {
   overlayLoading.classList.remove("error");
   overlayLoadingText.textContent = "Loading full-size image...";
   overlayImage.removeAttribute("src");
+  restoreOverlayMapView();
 }
 
 closeOverlay.addEventListener("click", closeOverlayView);
@@ -503,7 +526,7 @@ overlay.addEventListener("click", (event) => {
   }
 });
 
-function updateRouteView(photos) {
+function updateRouteView(photos, options = {}) {
   const routePoints = photos
     .filter((photo) => photo.latitude !== null && photo.longitude !== null && photo.capturedAt)
     .sort((a, b) => String(a.capturedAt).localeCompare(String(b.capturedAt)))
@@ -511,6 +534,10 @@ function updateRouteView(photos) {
 
   route.setLatLngs(routePoints);
 
+  if (options.preserveMapView) {
+    return;
+  }
+
   if (routePoints.length === 1) {
     map.setView(routePoints[0], 13);
   } else if (routePoints.length > 1) {
@@ -671,7 +698,8 @@ function renderVisiblePhotos(options = {}) {
         marker.on("mouseover", () => marker.openPopup());
         marker.on("click", () => {
           state.activePhotoId = photo.id;
-          renderVisiblePhotos({ fitMap: false });
+          rememberOverlayMapView();
+          renderVisiblePhotos({ fitMap: false, preserveMapView: true });
           openOverlay(photo);
         });
       }
@@ -685,14 +713,15 @@ function renderVisiblePhotos(options = {}) {
         '<img src="' + escapeHtml(photo.thumbUrl) + '" alt="' + escapeHtml(photo.name) + '" />';
       item.addEventListener("click", () => {
         state.activePhotoId = photo.id;
-        renderVisiblePhotos({ fitMap: false });
+        rememberOverlayMapView();
+        renderVisiblePhotos({ fitMap: false, preserveMapView: true });
         openOverlay(photo);
       });
       photoList.appendChild(item);
     }
   }
 
-  updateRouteView(visiblePhotos);
+  updateRouteView(visiblePhotos, options);
   renderTimeline();
 
   if (options.fitMap && visiblePhotos.length) {

src/server/app-assets.ts

@@ -37,7 +37,7 @@ export const APP_STYLES = `      :root {
         --photo-active-bg: rgba(51, 65, 85, 0.76);
         --photo-active-border: rgba(148, 163, 184, 0.34);
         --empty-border: rgba(148, 163, 184, 0.22);
-        --overlay-bg: rgba(2, 6, 23, 0.9);
+        --overlay-bg: rgba(2, 6, 23, 0.7);
         --card-border: rgba(148, 163, 184, 0.16);
         --timeline-surface: rgba(15, 23, 42, 0.88);
         --timeline-surface-soft: rgba(15, 23, 42, 0.76);
@@ -97,7 +97,7 @@ export const APP_STYLES = `      :root {
         --photo-active-bg: rgba(100, 116, 139, 0.12);
         --photo-active-border: rgba(100, 116, 139, 0.32);
         --empty-border: rgba(15, 23, 42, 0.16);
-        --overlay-bg: rgba(8, 12, 18, 0.78);
+        --overlay-bg: rgba(8, 12, 18, 0.7);
         --card-border: rgba(15, 23, 42, 0.11);
         --timeline-surface: rgba(255, 255, 255, 0.84);
         --timeline-surface-soft: rgba(255, 255, 255, 0.94);
@@ -587,6 +587,7 @@ export const APP_STYLES = `      :root {
         display: none;
         place-items: center;
         background: var(--overlay-bg);
+        backdrop-filter: blur(4px);
         z-index: 1000;
         padding: 24px;
       }
@@ -598,11 +599,13 @@ export const APP_STYLES = `      :root {
       .overlay-card {
         display: inline-grid;
         width: fit-content;
-        max-width: 100%;
+        max-width: min(100%, calc(100vw - 48px));
+        gap: 12px;
         overflow: hidden;
         border-radius: 0;
-        background: var(--timeline-surface-soft);
+        background: transparent;
-        border-color: var(--timeline-border);
+        border: 0;
+        box-shadow: none;
         color: var(--timeline-text);
       }
 
@@ -610,25 +613,32 @@ export const APP_STYLES = `      :root {
         position: relative;
         width: fit-content;
         max-width: 100%;
-        min-height: 48vh;
+        min-height: 0;
-        background: var(--timeline-surface-strong);
+        background: transparent;
       }
 
       .overlay-card header {
-        padding: 16px 18px;
+        padding: 0 4px;
-        border-bottom: 1px solid var(--timeline-border);
         display: flex;
-        justify-content: space-between;
+        justify-content: flex-start;
         align-items: center;
-        background: var(--timeline-surface-strong);
+        background: transparent;
         color: var(--timeline-text);
       }
 
+      .overlay-card header strong {
+        display: inline-flex;
+        padding: 8px 12px;
+        background: var(--timeline-surface-soft);
+        border: 1px solid var(--timeline-border);
+        backdrop-filter: blur(14px);
+      }
+
       .overlay-card img {
         display: block;
         width: auto;
-        max-width: min(1120px, calc(100vw - 48px));
+        max-width: min(1440px, calc(100vw - 48px));
-        max-height: 78vh;
+        max-height: calc(100vh - 112px);
         object-fit: contain;
         background: var(--timeline-surface-strong);
         transition: opacity 120ms ease;
@@ -677,6 +687,27 @@ export const APP_STYLES = `      :root {
         color: var(--timeline-text);
       }
 
+      .overlay-close {
+        position: fixed;
+        top: 16px;
+        right: 16px;
+        z-index: 1001;
+        width: 40px;
+        height: 40px;
+        padding: 0;
+        justify-content: center;
+        background: var(--timeline-surface-soft);
+        color: var(--timeline-text);
+        border: 1px solid var(--timeline-border);
+        box-shadow: var(--shadow-soft);
+        backdrop-filter: blur(14px);
+      }
+
+      .overlay-close:hover {
+        background: var(--timeline-surface-strong);
+        border-color: var(--timeline-border-strong);
+      }
+
       .thumb {
         width: min(210px, 100%);
         box-sizing: border-box;

src/server/page-template.ts

@@ -140,12 +140,12 @@ ${APP_STYLES}
     </section>
 
     <div class="overlay" id="overlay" aria-hidden="true">
+      <button class="close overlay-close" id="close-overlay" type="button" aria-label="Close photo">
+        x
+      </button>
       <div class="overlay-card">
         <header>
           <strong id="overlay-title">Photo</strong>
-          <button class="close" id="close-overlay" type="button" aria-label="Close photo">
-            x
-          </button>
         </header>
         <div class="overlay-media">
           <div class="overlay-loading" id="overlay-loading" aria-live="polite" aria-atomic="true">