fix(config): keep anonymous custom endpoints in picker when /v1/models probe fails

api/config.py

@@ -3807,6 +3807,18 @@ def _read_custom_endpoint_models(
                                 "models": models_for_group,
                             }
                         )
+                    elif pid == "custom" and cfg_base_url:
+                        # Anonymous custom endpoint: /v1/models probe may have
+                        # failed (e.g. llama-server, lightweight relay), but the
+                        # chat endpoint itself may still work.  Add the group
+                        # with an empty model list so the user can type a model
+                        # ID manually rather than being blocked by a silent
+                        # probe failure (#2542).
+                        groups.append({
+                            "provider": provider_name,
+                            "provider_id": pid,
+                            "models": [],
+                        })
         else:
             if default_model:
                 label = _get_label_for_model(default_model, groups)

static/index.html

@@ -138,6 +138,12 @@
     <span class="app-titlebar-sub" id="appTitlebarSub" hidden></span>
   </div>
   <div class="app-titlebar-spacer" aria-hidden="true"></div>
+  <button class="app-titlebar-reload" id="btnReload" onclick="window.location.reload()" type="button" aria-label="Reload" title="Reload page">
+    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true" width="16" height="16">
+      <polyline points="23 4 23 10 17 10"/>
+      <path d="M20.49 15a9 9 0 1 1-2.12-9.36L23 10"/>
+    </svg>
+  </button>
 </header>
 <div class="layout">
   <nav class="rail" aria-label="Primary navigation">

static/style.css

@@ -425,6 +425,18 @@
     @media (display-mode: standalone), (display-mode: fullscreen){
       :root{--app-titlebar-safe-top:env(safe-area-inset-top,0px);}
     }
+    /* Pull-to-refresh indicator for PWA standalone mode */
+    .pull-to-refresh-indicator{position:absolute;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:center;gap:8px;padding:12px;font-size:13px;color:var(--muted);pointer-events:none;opacity:0;transform:translateY(-100%);transition:opacity .2s,transform .2s;background:var(--bg);border-bottom:1px solid var(--border);}
+    .pull-to-refresh-indicator.active{opacity:1;transform:translateY(0);}
+    .pull-to-refresh-indicator .ptr-icon{display:inline-block;transition:transform .2s;font-size:16px;}
+    .pull-to-refresh-indicator .ptr-icon.ready{transform:rotate(180deg);color:var(--accent);}
+    /* Reload button — visible only in PWA standalone / fullscreen */
+    .app-titlebar-reload{display:none;align-items:center;justify-content:center;width:32px;height:32px;flex-shrink:0;background:none;border:none;color:var(--muted);border-radius:8px;cursor:pointer;padding:0;-webkit-tap-highlight-color:transparent;transition:background-color .15s,color .15s;}
+    .app-titlebar-reload:hover{background:var(--hover-bg);color:var(--text);}
+    @media (display-mode: standalone), (display-mode: fullscreen){
+      :root{--app-titlebar-safe-top:env(safe-area-inset-top,0px);}
+      .app-titlebar-reload{display:inline-flex;}
+    }
   }
   html{background:var(--sidebar);}
   body{background:var(--bg);color:var(--text);height:100vh;height:100dvh;overflow:hidden;display:flex;flex-direction:column;}

static/ui.js

@@ -1914,7 +1914,69 @@ if(typeof document!=='undefined'){
 // prevent the new chat's first scroll comparing against the previous chat's
 // scrollTop (Opus stage-302 SHOULD-FIX, #1731 follow-up).
 function _resetScrollDirectionTracker(){ _lastScrollTop=null; }
-if (typeof window !== 'undefined') window._resetScrollDirectionTracker = _resetScrollDirectionTracker;
+if(typeof window!=='undefined') window._resetScrollDirectionTracker=_resetScrollDirectionTracker;
+/* ── Pull-to-refresh for PWA standalone (Android) ── */
+(function(){
+  if(typeof document==='undefined') return;
+  const isStandalone=window.navigator?.standalone||matchMedia('(display-mode:standalone),(display-mode:fullscreen)').matches;
+  if(!isStandalone) return;
+  const el=document.getElementById('messages');
+  if(!el) return;
+  let _ptrState=0; // 0=idle, 1=pulling, 2=ready
+  let _ptrStartY=0;
+  let _ptrCurrentY=0;
+  const THRESHOLD=80;
+  let _indicator=null;
+  function _ptrCreateIndicator(){
+    if(_indicator) return;
+    _indicator=document.createElement('div');
+    _indicator.className='pull-to-refresh-indicator';
+    _indicator.innerHTML='<span class="ptr-icon">↓</span> <span class="ptr-text">Pull to refresh</span>';
+    el.parentNode.insertBefore(_indicator,el);
+  }
+  function _ptrUpdate(progress){
+    _ptrCreateIndicator();
+    const pulling=progress<1;
+    _indicator.classList.toggle('active',progress>0);
+    const icon=_indicator.querySelector('.ptr-icon');
+    const text=_indicator.querySelector('.ptr-text');
+    if(icon) icon.classList.toggle('ready',!pulling);
+    if(text) text.textContent=pulling?'Pull to refresh':'Release to refresh';
+  }
+  function _ptrReset(){
+    _ptrState=0;
+    _ptrStartY=0;
+    _ptrCurrentY=0;
+    if(_indicator) _indicator.classList.remove('active');
+  }
+  el.addEventListener('touchstart',function(e){
+    if(el.scrollTop>0||_ptrState!==0) return;
+    _ptrStartY=e.touches[0].clientY;
+    _ptrState=1;
+  },{passive:true});
+  el.addEventListener('touchmove',function(e){
+    if(_ptrState!==1) return;
+    _ptrCurrentY=e.touches[0].clientY;
+    const pull=_ptrCurrentY-_ptrStartY;
+    if(pull<0){ _ptrReset(); return; }
+    /* If not at the top, smooth-scroll to top first.
+       Next pull gesture will trigger the refresh. */
+    if(el.scrollTop>0){
+      el.scrollTo({top:0,behavior:'smooth'});
+      _ptrReset();
+      return;
+    }
+    const progress=Math.min(pull/THRESHOLD,1);
+    _ptrUpdate(progress);
+    _ptrState=progress>=1?2:1;
+    if(progress>0.3) e.preventDefault();
+  },{passive:false});
+  el.addEventListener('touchend',function(){
+    if(_ptrState===2){ window.location.reload(); return; }
+    _ptrReset();
+  },{passive:true});
+  el.addEventListener('touchcancel',_ptrReset,{passive:true});
+})();
 (function(){
   const el=document.getElementById('messages');
   if(!el) return;

tests/test_issue2542_anonymous_custom_endpoint.py

@@ -0,0 +1,33 @@
+"""Tests for anonymous custom endpoint fallback in get_available_models().
+
+Verifies that when /v1/models probe fails for an anonymous custom endpoint
+(configured via bare base_url, not custom_providers[]), the provider group
+is still added to the picker with an empty model list so the user can type
+a model ID manually (#2542).
+"""
+
+import re
+
+REPO = __file__.rsplit("/", 2)[-3] if "/" in __file__ else "."
+CONFIG_PY = open(f"{REPO}/api/config.py").read() if REPO != "." else ""
+
+
+def test_custom_anonymous_endpoint_empty_models_fallback_in_get_available_models():
+    """get_available_models() must add a 'custom' provider group with empty
+    models when cfg_base_url is set but the /v1/models probe returned nothing
+    (anonymous endpoint — no match in custom_providers[])."""
+    assert 'elif pid == "custom" and cfg_base_url:' in CONFIG_PY, (
+        "Anonymous custom endpoints with failed /v1/models probe must get "
+        "an empty-model fallback group instead of being silently dropped (#2542)"
+    )
+    # Verify the empty models dict is correct
+    assert '"models": []' in CONFIG_PY.split('elif pid == "custom" and cfg_base_url:')[1].split("groups.append")[1][:200], (
+        "The fallback group must have an empty models list"
+    )
+
+
+def test_revert_custom_endpoint_fallback_comment():
+    """The #2542 comment should reference the issue."""
+    assert "#2542" in CONFIG_PY, (
+        "The fallback should reference the issue number for traceability"
+    )