diff --git a/backend/internal/ai/gemini.go b/backend/internal/ai/gemini.go
index 4cddd9c..d736bc8 100644
--- a/backend/internal/ai/gemini.go
+++ b/backend/internal/ai/gemini.go
@@ -74,11 +74,43 @@ func (p *geminiProvider) Summarize(ctx context.Context, prompt string, _ GenOpti
 	return result.Candidates[0].Content.Parts[0].Text, nil
 }
 
-func (p *geminiProvider) ListModels(_ context.Context) ([]string, error) {
-	return []string{
-		"gemini-2.0-flash",
-		"gemini-2.0-flash-lite",
-		"gemini-1.5-pro",
-		"gemini-1.5-flash",
-	}, nil
+func (p *geminiProvider) ListModels(ctx context.Context) ([]string, error) {
+	url := fmt.Sprintf("https://generativelanguage.googleapis.com/v1beta/models?key=%s", p.apiKey)
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return nil, err
+	}
+	resp, err := p.client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	raw, _ := io.ReadAll(resp.Body)
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("gemini list models error %d: %s", resp.StatusCode, raw)
+	}
+	var result struct {
+		Models []struct {
+			Name               string   `json:"name"`
+			SupportedMethods   []string `json:"supportedGenerationMethods"`
+		} `json:"models"`
+	}
+	if err := json.Unmarshal(raw, &result); err != nil {
+		return nil, err
+	}
+	var names []string
+	for _, m := range result.Models {
+		for _, method := range m.SupportedMethods {
+			if method == "generateContent" {
+				// name is "models/gemini-xxx", strip prefix
+				id := m.Name
+				if len(id) > 7 {
+					id = id[7:] // strip "models/"
+				}
+				names = append(names, id)
+				break
+			}
+		}
+	}
+	return names, nil
 }
diff --git a/frontend/src/pages/Dashboard.tsx b/frontend/src/pages/Dashboard.tsx
index 7185b80..c49ab17 100644
--- a/frontend/src/pages/Dashboard.tsx
+++ b/frontend/src/pages/Dashboard.tsx
@@ -15,7 +15,7 @@ function useTextSelection(containerRef: React.RefObject<HTMLElement>) {
   const [selection, setSelection] = useState<{ text: string; x: number; y: number } | null>(null)
 
   useEffect(() => {
-    function onMouseUp() {
+    function readSelection() {
       const sel = window.getSelection()
       const text = sel?.toString().trim()
       if (!text || !containerRef.current) { setSelection(null); return }
@@ -28,14 +28,23 @@ function useTextSelection(containerRef: React.RefObject<HTMLElement>) {
         y: rect.top - containerRect.top - 8,
       })
     }
-    function onMouseDown(e: MouseEvent) {
+    function onMouseUp() { readSelection() }
+    // On mobile, selectionchange fires after the user lifts their finger
+    function onSelectionChange() {
+      const sel = window.getSelection()
+      if (!sel?.toString().trim()) setSelection(null)
+      else readSelection()
+    }
+    function onPointerDown(e: PointerEvent) {
       if (!(e.target as Element).closest('[data-context-action]')) setSelection(null)
     }
     document.addEventListener('mouseup', onMouseUp)
-    document.addEventListener('mousedown', onMouseDown)
+    document.addEventListener('selectionchange', onSelectionChange)
+    document.addEventListener('pointerdown', onPointerDown)
     return () => {
       document.removeEventListener('mouseup', onMouseUp)
-      document.removeEventListener('mousedown', onMouseDown)
+      document.removeEventListener('selectionchange', onSelectionChange)
+      document.removeEventListener('pointerdown', onPointerDown)
     }
   }, [containerRef])
 
@@ -278,11 +287,12 @@ export function Dashboard() {
               <CardContent>
                 <div ref={summaryRef} className="relative">
                   <SummaryContent content={current.content} />
+                  {/* Desktop: floating button above selection */}
                   {textSel && (
                     <button
                       data-context-action
                       onClick={addExcerpt}
-                      className="absolute z-10 flex items-center gap-1 rounded-full bg-primary text-primary-foreground text-xs px-2 py-1 shadow-lg hover:bg-primary/90 transition-colors"
+                      className="absolute z-10 hidden md:flex items-center gap-1 rounded-full bg-primary text-primary-foreground text-xs px-2 py-1 shadow-lg hover:bg-primary/90 transition-colors"
                       style={{ left: textSel.x, top: textSel.y, transform: 'translate(-50%, -100%)' }}
                     >
                       <Plus className="h-3 w-3" />
@@ -290,6 +300,19 @@ export function Dashboard() {
                     </button>
                   )}
                 </div>
+                {/* Mobile: fixed bottom bar — avoids conflict with native selection menu */}
+                {textSel && (
+                  <div className="md:hidden fixed bottom-16 left-0 right-0 z-50 flex justify-center px-4 pointer-events-none">
+                    <button
+                      data-context-action
+                      onClick={addExcerpt}
+                      className="pointer-events-auto flex items-center gap-2 rounded-full bg-primary text-primary-foreground text-sm px-4 py-2.5 shadow-xl"
+                    >
+                      <Plus className="h-4 w-4" />
+                      Ajouter au contexte
+                    </button>
+                  </div>
+                )}
                 <p className="text-xs text-muted-foreground mt-4 italic">
                   Sélectionnez du texte pour l'ajouter au contexte, puis posez une question dans le panneau qui apparaît.
                 </p>