feat: native folder picker button via tkinter

index.html

@@ -11,8 +11,12 @@
     .subtitle { color: #888; margin-bottom: 2rem; font-size: 0.95rem; }
     .card { background: #16213e; border-radius: 12px; padding: 1.5rem; width: 100%; max-width: 640px; margin-bottom: 1.5rem; }
     label { display: block; font-size: 0.85rem; color: #aaa; margin-bottom: 0.4rem; }
+    .folder-row { display: flex; gap: 0.5rem; align-items: stretch; }
+    .folder-row input[type="text"] { flex: 1; }
     input[type="text"] { width: 100%; padding: 0.6rem 0.8rem; border-radius: 8px; border: 1px solid #333; background: #0f3460; color: #fff; font-size: 1rem; }
     input[type="text"]:focus { outline: 2px solid #e94560; }
+    .pick-btn { padding: 0 1rem; border-radius: 8px; border: 1px solid #555; background: #0f3460; color: #aaa; cursor: pointer; font-size: 1.1rem; white-space: nowrap; transition: border-color 0.15s, color 0.15s; }
+    .pick-btn:hover { border-color: #e94560; color: #fff; }
     button.primary { margin-top: 1rem; width: 100%; padding: 0.75rem; border-radius: 8px; border: none; background: #e94560; color: #fff; font-size: 1rem; font-weight: 600; cursor: pointer; }
     button.primary:hover { background: #c73652; }
     button.primary:disabled { background: #555; cursor: not-allowed; }
@@ -55,7 +59,10 @@
   <!-- Start -->
   <div id="view-start" class="view active card">
     <label for="folder-input">Ordnerpfad</label>
-    <input type="text" id="folder-input" placeholder="/Users/name/Fotos/Shooting-2026" />
+    <div class="folder-row">
+      <input type="text" id="folder-input" placeholder="/Users/name/Fotos/Shooting-2026" />
+      <button class="pick-btn" id="pick-btn" title="Ordner auswählen">&#128193;</button>
+    </div>
 
     <div style="margin-top: 1.5rem;">
       <div class="toggle-row">
@@ -148,6 +155,18 @@
       input.addEventListener("input", () => { label.textContent = input.value; });
     });
 
+    // --- Folder picker ---
+    el("pick-btn").addEventListener("click", async () => {
+      try {
+        const res = await fetch("/pick-folder");
+        if (res.status === 204) return;
+        const data = await res.json();
+        el("folder-input").value = data.folder;
+      } catch (e) {
+        alert("Ordner konnte nicht geöffnet werden: " + e.message);
+      }
+    });
+
     // --- Cancel ---
     el("cancel-btn").addEventListener("click", () => location.reload());
     el("restart-btn").addEventListener("click", () => location.reload());

server.py

@@ -44,6 +44,20 @@ def serve_frontend():
     return FileResponse("index.html")
 
 
+@app.get("/pick-folder")
+def pick_folder():
+    import tkinter as tk
+    from tkinter import filedialog
+    root = tk.Tk()
+    root.withdraw()
+    root.attributes("-topmost", True)
+    folder = filedialog.askdirectory(title="Ordner auswählen")
+    root.destroy()
+    if not folder:
+        raise HTTPException(status_code=204, detail="Kein Ordner ausgewählt")
+    return {"folder": folder}
+
+
 PREVIEW_ALLOWED_EXTENSIONS = {".jpg", ".jpeg", ".png"}