From 422d2e024cc5927280bfc9e2794797d510005728 Mon Sep 17 00:00:00 2001
From: Leonard Kugis <leonard@kug.is>
Date: Tue, 15 Sep 2026 17:10:41 +0200
Subject: Implemented infinite scroll

---
 templates/index.html | 329 +++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 241 insertions(+), 88 deletions(-)

diff --git a/templates/index.html b/templates/index.html
index da9c1ff..dfb4c2c 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -105,10 +105,11 @@ main { flex:1; display:flex; overflow:hidden; }
 .card .chk { position:absolute; top:4px; left:4px; width:18px; height:18px; border-radius:4px; border:2px solid rgba(255,255,255,0.4); background:rgba(0,0,0,0.5); display:flex; align-items:center; justify-content:center; font-size:0.6rem; color:#fff; cursor:pointer; z-index:5; }
 .card.sel .chk { background:var(--accent); border-color:var(--accent); }
 
-#pg { display:flex; justify-content:center; align-items:center; gap:6px; margin-top:12px; }
-#pg button { background:var(--surface); color:var(--text); border:1px solid var(--border); padding:3px 10px; border-radius:4px; cursor:pointer; font-size:0.7rem; }
-#pg button:hover { border-color:var(--accent); }
-#pg span { font-size:0.7rem; color:var(--text2); }
+/* ── removed pagination; loading indicator ──────────────── */
+#load-more { display:flex; justify-content:center; padding:16px; }
+#load-more .spinner { width:24px; height:24px; border:3px solid var(--border); border-top-color:var(--accent); border-radius:50%; animation:spin 0.8s linear infinite; display:none; }
+#load-more .spinner.on { display:block; }
+@keyframes spin { to { transform:rotate(360deg); } }
 
 .status { position:fixed; bottom:16px; right:16px; background:var(--surface2); border:1px solid var(--border); padding:8px 14px; border-radius:6px; font-size:0.75rem; z-index:300; opacity:0; transition:opacity 0.2s; pointer-events:none; }
 .status.on { opacity:1; }
@@ -225,7 +226,7 @@ main { flex:1; display:flex; overflow:hidden; }
     <section id="content">
         <div id="grid"></div>
         <div id="empty" style="color:var(--text2);text-align:center;padding:40px;display:none;">Keine Dateien gefunden.</div>
-        <div id="pg"></div>
+        <div id="load-more"><div class="spinner" id="load-spin"></div></div>
     </section>
 </main>
 
@@ -234,13 +235,61 @@ main { flex:1; display:flex; overflow:hidden; }
 <div class="modal" id="conf-modal"><div class="mc" style="min-width:260px;text-align:center;"><p id="conf-msg"></p><button id="conf-yes" style="background:var(--red);color:#fff;border:none;padding:6px 16px;border-radius:4px;margin:6px;cursor:pointer;">Ja</button><button id="conf-no" style="background:var(--border);color:var(--text);border:none;padding:6px 16px;border-radius:4px;margin:6px;cursor:pointer;">Nein</button></div></div>
 
 <script>
-const S = {files:[],disp:[],page:0,ps:50,sel:new Set(),tags:[],stags:[],sm:false,ph:null,_navKd:null};
+// ── State ──────────────────────────────────────────────────────────────────
+const S = {
+    files:[],              // all loaded file objects
+    sel:new Set(),          // selected hashes
+    tags:[],                // all known tags
+    stags:[],               // search tag names (sidebar selection)
+    sm:false,               // search mode active?
+    ph:null,                // currently previewed hash
+    _navKd:null,            // keyboard listener cleanup
+    _loading:false,         // currently fetching more?
+    _exhausted:false,       // all files loaded?
+    PAGE:80,                // batch size
+    _obs:null,              // IntersectionObserver instance
+    _sentinel:null,         // sentinel element
+    _scrollTop:0,           // saved scroll position when closing modal
+};
 
 function st(msg){let e=document.getElementById('status');e.textContent=msg;e.classList.add('on');clearTimeout(e._t);e._t=setTimeout(()=>e.classList.remove('on'),2200);}
 async function api(u,o={}){let r=await fetch(u,o);if(!r.ok){let e=await r.json().catch(()=>({error:r.statusText}));throw new Error(e.error||r.statusText);}return r.json();}
 
-// ── Header & sidebar toggle ──────────────────────────────────────────────
+// ── URL helpers ─────────────────────────────────────────────────────────────
+function _updateURL(){
+    let p=new URLSearchParams();
+    if(S.sm && S.stags.length) p.set('tags',S.stags.join(','));
+    else if(!S.sm) p.set('all','1');
+    // encode scroll anchor: hash of last rendered file
+    if(S._rendered && S._rendered.length){
+        let last=S._rendered[S._rendered.length-1];
+        if(last) p.set('after',last.hash);
+    }
+    if(S.sel.size) p.set('sel',[...S.sel].join(','));
+    let q=p.toString();
+    let url=location.pathname+(q?'?'+q:'');
+    history.replaceState(null,'',url);
+}
+
+function _loadStateFromURL(){
+    let p=new URLSearchParams(location.search);
+    let tags=p.get('tags');
+    if(tags){
+        S.stags=tags.split(',').filter(Boolean);
+        S.sm=true;
+    } else if(p.has('all')){
+        S.sm=false; S.stags=[];
+    } else {
+        S.sm=false; S.stags=[];
+    }
+    let sel=p.get('sel');
+    if(sel) S._urlSel=new Set(sel.split(',').filter(Boolean));
+    else S._urlSel=new Set();
+    // 'after' is used to skip past already-loaded content on initial load
+    S._urlAfter=p.get('after')||null;
+}
 
+// ── Header & sidebar toggle ─────────────────────────────────────────────────
 function _persist(k,v){try{localStorage.setItem('medman_'+k,JSON.stringify(v));}catch(e){}}
 function _restore(k,def){try{let v=localStorage.getItem('medman_'+k);return v!==null?JSON.parse(v):def;}catch(e){return def;}}
 
@@ -265,8 +314,7 @@ document.getElementById('b-toggle-side').addEventListener('click',()=>{
     _persist('sidebar_visible',!collapsed);
 });
 
-// ── Section toggling ─────────────────────────────────────────────────────
-
+// ── Section toggling ────────────────────────────────────────────────────────
 document.querySelectorAll('.sec-h').forEach(h=>{
     h.addEventListener('click',()=>{
         let sec=h.dataset.sec, b=document.getElementById('secb-'+sec);
@@ -274,8 +322,7 @@ document.querySelectorAll('.sec-h').forEach(h=>{
     });
 });
 
-// ── Tags ─────────────────────────────────────────────────────────────────
-
+// ── Tags ────────────────────────────────────────────────────────────────────
 async function lt(){S.tags=await api('/api/tags');rTagList();rSearchSuggestions('');}
 function rTagList(){
     let l=document.getElementById('tag-list');
@@ -288,7 +335,7 @@ function rTagList(){
         toggleSearchTag(c.dataset.tag);
     });});
     l.querySelectorAll('.rm').forEach(b=>{b.addEventListener('click',async e=>{
-        e.stopPropagation(); await api(`/api/tags/${b.dataset.tid}`,{method:'DELETE'}); await lt(); if(S.files.length) await lf(); st('Tag gelöscht');
+        e.stopPropagation(); await api(`/api/tags/${b.dataset.tid}`,{method:'DELETE'}); await lt(); if(S.files.length) await reloadFiles(); st('Tag gelöscht');
     });});
 }
 
@@ -298,8 +345,7 @@ function toggleSearchTag(name){
     rTagList(); rSearchTags();
 }
 
-// ── Search ───────────────────────────────────────────────────────────────
-
+// ── Search ──────────────────────────────────────────────────────────────────
 function rSearchTags(){
     document.getElementById('search-tags').innerHTML=S.stags.map(n=>
         `<span class="tc sel">${n}<span class="rm" data-rm="${n}">&times;</span></span>`
@@ -325,13 +371,15 @@ document.getElementById('si-in').addEventListener('input',function(){rSearchSugg
 
 document.getElementById('b-search').addEventListener('click',()=>{
     if(!S.stags.length){st('Keine Tags ausgewählt');return;}
-    S.sm=true; let t=S.stags.join(',');
-    api(`/api/search?tags=${encodeURIComponent(t)}`).then(d=>{S.files=d;S.page=0;rGrid();}).catch(e=>{st('Suche fehlgeschlagen');S.files=[];rGrid();});
+    S.sm=true;
+    resetAndReload();
+});
+document.getElementById('b-clear').addEventListener('click',()=>{
+    S.sm=false; S.stags=[]; rTagList(); rSearchTags();
+    resetAndReload();
 });
-document.getElementById('b-clear').addEventListener('click',()=>{S.sm=false;S.stags=[];S.page=0;rTagList();rSearchTags();lf();});
-
-// ── Tag create ───────────────────────────────────────────────────────────
 
+// ── Tag create ──────────────────────────────────────────────────────────────
 document.getElementById('ti-btn').addEventListener('click',async()=>{
     let i=document.getElementById('ti-in'),n=i.value.trim(); if(!n)return;
     await api('/api/tags',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({name:n})});
@@ -339,49 +387,137 @@ document.getElementById('ti-btn').addEventListener('click',async()=>{
 });
 document.getElementById('ti-in').addEventListener('keydown',e=>{if(e.key==='Enter')document.getElementById('ti-btn').click();});
 
-// ── Files ────────────────────────────────────────────────────────────────
-
-async function lf(tf=null){let u='/api/files'+(tf?`?tag=${encodeURIComponent(tf)}`:'');S.files=await api(u);S.page=0;rGrid();}
-
-function rGrid(){
-    let s=S.page*S.ps; S.disp=S.files.slice(s,s+S.ps);
-    let g=document.getElementById('grid'),e=document.getElementById('empty');
-    if(!S.files.length){g.innerHTML='';e.style.display='block';document.getElementById('pg').innerHTML='';updateSelUI();return;}
-    e.style.display='none';
-    g.innerHTML=S.disp.map(f=>{
-        let sel=S.sel.has(f.hash)?'sel':'',mt=f.mt||'other',
-            tg=(f.tags||[]).map(t=>`<span class="mt">${t.name}</span>`).join(''),
-            sz=fs(f.size), ico={video:'🎬',image:'🖼️',audio:'🎵',doc:'📄',other:'📁'}[mt]||'📁',
-            ts=mt==='audio'?ico:`<img src="/thumb/${f.hash}" loading="lazy" alt="">`;
-        return `<div class="card ${sel}" data-hash="${f.hash}">
-            <div class="chk">✓</div>
-            <div class="th">${ts}</div><div class="badge">${mt}</div>
-            <div class="info"><div class="hash" title="${f.hash}">${f.hash}</div><div class="meta">${sz} · DD${f.didx}</div></div>
-            <div class="ct">${tg}</div></div>`;
-    }).join('');
-    g.querySelectorAll('.card').forEach(c=>{
-        c.addEventListener('click',e=>{
-            let h=c.dataset.hash;
-            if(e.ctrlKey||e.metaKey){toggleSel(h,c);return;}
-            if(e.target.classList.contains('chk')||e.target.closest('.chk')){
-                toggleSel(h,c); e.stopPropagation(); return;
-            }
-            op(h);
-        });
+// ── Files: continuous scroll ────────────────────────────────────────────────
+// Fetch one batch of files. Returns empty array when exhausted.
+async function _fetchBatch(afterHash=null){
+    let params=new URLSearchParams();
+    if(S.sm && S.stags.length){
+        params.set('tags',S.stags.join(','));
+    }
+    if(afterHash) params.set('after',afterHash);
+    params.set('limit',String(S.PAGE));
+
+    let endpoint=S.sm && S.stags.length?'/api/search':'/api/files';
+    let url=endpoint+'?'+params.toString();
+    return await api(url);
+}
+
+function _cardHTML(f){
+    let sel=S.sel.has(f.hash)?'sel':'',mt=f.mt||'other',
+        tg=(f.tags||[]).map(t=>`<span class="mt">${t.name}</span>`).join(''),
+        sz=fs(f.size), ico={video:'🎬',image:'🖼️',audio:'🎵',doc:'📄',other:'📁'}[mt]||'📁',
+        ts=mt==='audio'?ico:`<img src="/thumb/${f.hash}" loading="lazy" alt="">`;
+    return `<div class="card ${sel}" data-hash="${f.hash}">
+        <div class="chk">✓</div>
+        <div class="th">${ts}</div><div class="badge">${mt}</div>
+        <div class="info"><div class="hash" title="${f.hash}">${f.hash}</div><div class="meta">${sz} · DD${f.didx}</div></div>
+        <div class="ct">${tg}</div></div>`;
+}
+
+function _bindCardEvents(c){
+    c.addEventListener('click',e=>{
+        let h=c.dataset.hash;
+        if(e.ctrlKey||e.metaKey){toggleSel(h,c);return;}
+        if(e.target.classList.contains('chk')||e.target.closest('.chk')){
+            toggleSel(h,c); e.stopPropagation(); return;
+        }
+        // Save scroll position before opening
+        S._scrollTop=document.getElementById('content').scrollTop;
+        op(h);
     });
-    let tp=Math.ceil(S.files.length/S.ps);
-    document.getElementById('pg').innerHTML=tp<=1?'':`<button onclick="S.page=Math.max(0,S.page-1);rGrid();" ${S.page===0?'disabled':''}>←</button><span>${S.page+1}/${tp}</span><button onclick="S.page=Math.min(${tp-1},S.page+1);rGrid();" ${S.page>=tp-1?'disabled':''}>→</button>`;
+}
+
+async function _loadMore(){
+    if(S._loading||S._exhausted) return;
+    S._loading=true;
+    document.getElementById('load-spin').classList.add('on');
+    try{
+        let after=S._rendered&&S._rendered.length?S._rendered[S._rendered.length-1].hash:null;
+        let batch=await _fetchBatch(after);
+        if(!batch.length){S._exhausted=true; return;}
+        S.files.push(...batch);
+        _appendCards(batch);
+        S._rendered=Array.isArray(S._rendered)?S._rendered.concat(batch):batch.slice();
+    }catch(e){
+        st('Laden fehlgeschlagen');
+    }finally{
+        S._loading=false;
+        document.getElementById('load-spin').classList.remove('on');
+        _updateURL();
+    }
+}
+
+function _appendCards(items){
+    let g=document.getElementById('grid');
+    for(let f of items){
+        let t=document.createElement('div');
+        t.innerHTML=_cardHTML(f);
+        let card=t.firstElementChild;
+        _bindCardEvents(card);
+        g.appendChild(card);
+    }
+    // Update sentinel
+    if(S._sentinel) S._sentinel.remove();
+    let sentinel=document.createElement('div');
+    sentinel.style.height='1px'; sentinel.id='obs-sentinel';
+    document.getElementById('content').appendChild(sentinel);
+    S._sentinel=sentinel;
+    if(S._obs) S._obs.observe(sentinel);
+}
+
+function _observeSentinel(){
+    if(S._obs) S._obs.disconnect();
+    S._obs=new IntersectionObserver(entries=>{
+        if(entries[0].isIntersecting&&!S._loading&&!S._exhausted){
+            _loadMore();
+        }
+    },{root:document.getElementById('content'),rootMargin:'400px'});
+}
+
+async function resetAndReload(){
+    // Clear grid
+    document.getElementById('grid').innerHTML='';
+    document.getElementById('empty').style.display='none';
+    if(S._sentinel){S._sentinel.remove();S._sentinel=null;}
+    S.files=[]; S._rendered=[]; S._exhausted=false; S._loading=false;
+    document.getElementById('load-spin').classList.remove('on');
+    _updateURL();
+    // Restore URL selections
+    S.sel.clear(); if(S._urlSel){for(let h of S._urlSel)S.sel.add(h);}
     updateSelUI();
+    // Load initial batch
+    _observeSentinel();
+    await _loadMore();
+    // If grid still empty after first batch, show empty message
+    if(!S.files.length){
+        document.getElementById('empty').style.display='block';
+    }
 }
 
-function fs(b){if(!b)return'';if(b<1024)return b+' B';if(b<1048576)return (b/1024).toFixed(1)+' KB';if(b<1073741824)return (b/1048576).toFixed(1)+' MB';return (b/1073741824).toFixed(1)+' GB';}
+async function reloadFiles(){
+    // Used after mutations (tag, delete, move): full reload preserving scroll
+    let scrollTop=document.getElementById('content').scrollTop;
+    document.getElementById('grid').innerHTML='';
+    if(S._sentinel){S._sentinel.remove();S._sentinel=null;}
+    S.files=[]; S._rendered=[]; S._exhausted=false; S._loading=false;
+    document.getElementById('load-spin').classList.remove('on');
+    _updateURL();
+    _observeSentinel();
+    await _loadMore();
+    if(!S.files.length){
+        document.getElementById('empty').style.display='block';
+    }
+    // Restore scroll position (approximate)
+    requestAnimationFrame(()=>{document.getElementById('content').scrollTop=scrollTop;});
+}
 
-// ── Selection ────────────────────────────────────────────────────────────
+function fs(b){if(!b)return'';if(b<1024)return b+' B';if(b<1048576)return (b/1024).toFixed(1)+' KB';if(b<1073741824)return (b/1048576).toFixed(1)+' MB';return (b/1073741824).toFixed(1)+' GB';}
 
+// ── Selection ───────────────────────────────────────────────────────────────
 function toggleSel(h,cardEl){
     if(S.sel.has(h)){S.sel.delete(h);if(cardEl)cardEl.classList.remove('sel');}
     else{S.sel.add(h);if(cardEl)cardEl.classList.add('sel');}
-    updateSelUI();
+    updateSelUI(); _updateURL();
 }
 function updateSelUI(){
     let n=S.sel.size;
@@ -389,24 +525,32 @@ function updateSelUI(){
     document.getElementById('sel-bar').classList.toggle('on',n>0);
     document.getElementById('sel-info').textContent=n?n+' Dateien ausgewählt':'Keine Auswahl';
 }
-function clearSel(){S.sel.clear();updateSelUI();rGrid();}
-function selAll(){for(let f of S.disp){S.sel.add(f.hash);}updateSelUI();rGrid();}
-
-// ── Navigation helpers ───────────────────────────────────────────────────
+function clearSel(){S.sel.clear();updateSelUI();_updateURL(); refreshCardSelections();}
+function selAll(){
+    // Select all currently rendered cards
+    let cards=document.querySelectorAll('#grid .card');
+    for(let c of cards){S.sel.add(c.dataset.hash);}
+    updateSelUI();_updateURL(); refreshCardSelections();
+}
+function refreshCardSelections(){
+    document.querySelectorAll('#grid .card').forEach(c=>{
+        c.classList.toggle('sel',S.sel.has(c.dataset.hash));
+    });
+}
 
+// ── Navigation helpers ──────────────────────────────────────────────────────
 function _clearNavKd(){
     if(S._navKd){document.removeEventListener('keydown',S._navKd);S._navKd=null;}
 }
 function opNav(delta){
     if(!S.ph)return; let idx=S.files.findIndex(x=>x.hash===S.ph); if(idx<0)return;
     let nidx=idx+delta; if(nidx<0||nidx>=S.files.length)return;
-    let page=Math.floor(nidx/S.ps);
-    if(page!==S.page){S.page=page;rGrid();}
+    // Ensure next item is loaded if near the end
+    if(nidx>=S.files.length-S.PAGE/2 && !S._exhausted){_loadMore();}
     op(S.files[nidx].hash);
 }
 
-// ── Selection actions ────────────────────────────────────────────────────
-
+// ── Selection actions ───────────────────────────────────────────────────────
 async function selTag(){
     if(!S.sel.size){st('Keine Dateien ausgewählt');return;}
     let opts=S.tags.map(t=>`<option value="${t.id}">${t.name}</option>`).join('');
@@ -419,7 +563,7 @@ async function selTag(){
         let s=document.getElementById('stag-sel'); if(!s.value)return;
         let tid=parseInt(s.value),c=0;
         for(let h of[...S.sel]){try{await api(`/api/files/${h}/tags`,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({tid})});c++;}catch(e){}}
-        document.getElementById('prev-modal').classList.remove('on'); st(`${c} getaggt`); await lf(S.sm?S.stags[0]:null);
+        document.getElementById('prev-modal').classList.remove('on'); st(`${c} getaggt`); await reloadFiles();
     };
 }
 
@@ -440,7 +584,7 @@ async function selUntag(){
         let s=document.getElementById('suntag-sel'); if(!s.value)return;
         let tid=parseInt(s.value),c=0;
         for(let h of[...S.sel]){try{await api(`/api/files/${h}/tags/${tid}`,{method:'DELETE'});c++;}catch(e){}}
-        document.getElementById('prev-modal').classList.remove('on'); st(`${c} Tags entfernt`); await lf(S.sm?S.stags[0]:null);
+        document.getElementById('prev-modal').classList.remove('on'); st(`${c} Tags entfernt`); await reloadFiles();
     };
 }
 
@@ -456,7 +600,7 @@ async function selMove(){
         let s=document.getElementById('smv-sel'); if(!s.value)return;
         let ti=parseInt(s.value),c=0;
         for(let h of[...S.sel]){try{await api(`/api/files/${h}/move`,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({didx:ti})});c++;}catch(e){}}
-        document.getElementById('prev-modal').classList.remove('on'); clearSel(); st(`${c} verschoben`); await lf(S.sm?S.stags[0]:null);
+        document.getElementById('prev-modal').classList.remove('on'); clearSel(); st(`${c} verschoben`); await reloadFiles();
     };
 }
 
@@ -464,16 +608,16 @@ async function selDel(){
     if(!S.sel.size){st('Keine Dateien ausgewählt');return;}
     sc(`${S.sel.size} Dateien wirklich löschen?`,async()=>{
         let c=0; for(let h of[...S.sel]){try{await api(`/api/files/${h}`,{method:'DELETE'});c++;}catch(e){}}
-        clearSel(); st(`${c} gelöscht`); await lf(S.sm?S.stags[0]:null);
+        clearSel(); st(`${c} gelöscht`); await reloadFiles();
     });
 }
 
 function sc(msg,cb){document.getElementById('conf-msg').textContent=msg;document.getElementById('conf-modal').classList.add('on');document.getElementById('conf-yes').onclick=()=>{document.getElementById('conf-modal').classList.remove('on');cb();};}
 
-// ── Single file preview ──────────────────────────────────────────────────
-
+// ── Single file preview ─────────────────────────────────────────────────────
 async function op(h){
     _clearNavKd();
+    S._scrollTop=document.getElementById('content').scrollTop;
     S.ph=h; let f=S.files.find(x=>x.hash===h); if(!f)return;
     let ft=await api(`/api/files/${h}/tags`),dd=await api('/api/dat'),
         ht=`<h2>${h}</h2>`,mt=f.mt||'other';
@@ -520,23 +664,21 @@ async function op(h){
     let ab=document.getElementById('atb'); if(ab)ab.onclick=async()=>{
         let s=document.getElementById('ats'); if(!s.value)return;
         await api(`/api/files/${h}/tags`,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({tid:parseInt(s.value)})});
-        st('Tag hinzugefügt'); await lf(S.sm?S.stags[0]:null); op(h);};
+        st('Tag hinzugefügt'); await reloadFiles(); op(h);};
     let mb=document.getElementById('mvb'); if(mb)mb.onclick=async()=>{
         let s=document.getElementById('mds'); if(!s.value)return;
         await api(`/api/files/${h}/move`,{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({didx:parseInt(s.value)})});
-        st('Verschoben'); await lf(S.sm?S.stags[0]:null); op(h);};
+        st('Verschoben'); await reloadFiles(); op(h);};
     let db=document.getElementById('delb'); if(db)db.onclick=()=>{
-        sc(`Diese Datei wirklich löschen?`,async()=>{await api(`/api/files/${h}`,{method:'DELETE'}); st('Gelöscht'); S.sel.delete(h); document.getElementById('prev-modal').classList.remove('on'); await lf(S.sm?S.stags[0]:null);});};
+        sc(`Diese Datei wirklich löschen?`,async()=>{await api(`/api/files/${h}`,{method:'DELETE'}); st('Gelöscht'); S.sel.delete(h); document.getElementById('prev-modal').classList.remove('on'); await reloadFiles();});};
     document.querySelectorAll('#m-body .rm').forEach(b=>{b.onclick=async e=>{e.stopPropagation();
-        await api(`/api/files/${h}/tags/${b.dataset.tid}`,{method:'DELETE'}); st('Tag entfernt'); await lf(S.sm?S.stags[0]:null); op(h);};});
+        await api(`/api/files/${h}/tags/${b.dataset.tid}`,{method:'DELETE'}); st('Tag entfernt'); await reloadFiles(); op(h);};});
 }
 
-// ── Data dirs ────────────────────────────────────────────────────────────
-
+// ── Data dirs ───────────────────────────────────────────────────────────────
 async function ldd(){let d=await api('/api/dat');document.getElementById('dd-info').innerHTML=d.dat.map(x=>`<div class="dd" style="margin-bottom:4px;"><strong>DD${x.i}</strong> (${(x.w*100).toFixed(0)}%)<br>${x.n} Dateien, ${(x.bytes/(1024*1024*1024)).toFixed(1)} GB<br><span style="opacity:0.5;word-break:break-all;font-size:0.55rem;">${x.path}</span></div>`).join('')+(d.src.length?`<div style="margin-top:6px;"><strong>Quellen:</strong><br>${d.src.map(s=>'<span style="opacity:0.5;font-size:0.55rem;">'+s+'</span>').join('<br>')}</div>`:'');}
 
-// ── Header buttons ───────────────────────────────────────────────────────
-
+// ── Header buttons ──────────────────────────────────────────────────────────
 document.getElementById('b-up').addEventListener('click',()=>document.getElementById('up-area').classList.toggle('on'));
 document.getElementById('up-cancel').addEventListener('click',()=>document.getElementById('up-area').classList.remove('on'));
 document.getElementById('up-go').addEventListener('click',async()=>{
@@ -544,28 +686,26 @@ document.getElementById('up-go').addEventListener('click',async()=>{
     let fd=new FormData(); for(let f of i.files)fd.append('file',f);
     p.textContent=`Lade ${i.files.length} Datei(en)...`;
     try{let r=await fetch('/api/upload',{method:'POST',body:fd}),d=await r.json(),ok=d.results.filter(x=>x.status==='ok').length;
-        p.textContent=`${ok} von ${d.results.length} hochgeladen.`; i.value=''; await lf(); await ldd();
+        p.textContent=`${ok} von ${d.results.length} hochgeladen.`; i.value=''; await reloadFiles(); await ldd();
         setTimeout(()=>p.textContent='',3000);}catch(e){p.textContent='Fehler: '+e.message;}
 });
-document.getElementById('b-scan').addEventListener('click',async()=>{st('Scanne...');let r=await api('/api/scan',{method:'POST'});st(`Scan: ${r.ingested} neu`);await lf();await ldd();});
+document.getElementById('b-scan').addEventListener('click',async()=>{st('Scanne...');let r=await api('/api/scan',{method:'POST'});st(`Scan: ${r.ingested} neu`);await reloadFiles();await ldd();});
 document.getElementById('b-exp').addEventListener('click',async()=>{
     let d=await api('/api/tags/export'),bl=new Blob([JSON.stringify(d,null,2)],{type:'application/json'}),u=URL.createObjectURL(bl),a=document.createElement('a');
     a.href=u;a.download='medman_tags_'+new Date().toISOString().slice(0,10)+'.json';a.click();URL.revokeObjectURL(u);st('Exportiert');
 });
 document.getElementById('f-imp').addEventListener('change',async e=>{
     let f=e.target.files[0];if(!f)return;let t=await f.text(),d=JSON.parse(t),r=await api('/api/tags/import',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify(d)});
-    await lt();if(S.files.length)await lf();st(`${r.imported||0} importiert`);
+    await lt();if(S.files.length)await reloadFiles();st(`${r.imported||0} importiert`);
 });
 
-// ── Selection bar ────────────────────────────────────────────────────────
-
+// ── Selection bar ───────────────────────────────────────────────────────────
 document.getElementById('sel-tag-btn').addEventListener('click',selTag);
 document.getElementById('sel-mv-btn').addEventListener('click',selMove);
 document.getElementById('sel-del-btn').addEventListener('click',selDel);
 document.getElementById('sel-clr-btn').addEventListener('click',clearSel);
 
-// ── Selection section ────────────────────────────────────────────────────
-
+// ── Selection section ───────────────────────────────────────────────────────
 document.getElementById('b-sel-all').addEventListener('click',selAll);
 document.getElementById('b-sel-tag').addEventListener('click',selTag);
 document.getElementById('b-sel-untag').addEventListener('click',selUntag);
@@ -573,22 +713,35 @@ document.getElementById('b-sel-mv').addEventListener('click',selMove);
 document.getElementById('b-sel-del').addEventListener('click',selDel);
 document.getElementById('b-sel-clr').addEventListener('click',clearSel);
 
-// ── Modals ───────────────────────────────────────────────────────────────
-
+// ── Modals ──────────────────────────────────────────────────────────────────
 function closeModal(){
     _clearNavKd();
     document.getElementById('prev-modal').classList.remove('on');
     S.ph=null;
-    lf(S.sm?S.stags[0]:null);
+    // Restore scroll position
+    requestAnimationFrame(()=>{
+        document.getElementById('content').scrollTop=S._scrollTop||0;
+    });
 }
 document.getElementById('m-close').addEventListener('click',closeModal);
 document.getElementById('prev-modal').addEventListener('click',e=>{if(e.target===e.currentTarget)closeModal();});
 document.getElementById('conf-no').addEventListener('click',()=>document.getElementById('conf-modal').classList.remove('on'));
 document.addEventListener('keydown',e=>{if(e.key==='Escape'){if(document.getElementById('prev-modal').classList.contains('on'))closeModal();}});
 
-// ── Init ─────────────────────────────────────────────────────────────────
-
-lt(); lf(); ldd();
+// ── Init ────────────────────────────────────────────────────────────────────
+_loadStateFromURL();
+lt(); ldd();
+_observeSentinel();
+_loadMore().then(()=>{
+    if(!S.files.length) document.getElementById('empty').style.display='block';
+    // Apply URL selections
+    if(S._urlSel&&S._urlSel.size){
+        for(let h of S._urlSel) S.sel.add(h);
+        updateSelUI();
+        refreshCardSelections();
+    }
+    _updateURL();
+});
 </script>
 </body>
 </html>
-- 
cgit v1.2.3