feat: upload file nella cartella IMAGES_DIR

POST /upload_to_folder: sanitizza nome, valida estensione e contenuto
via cv2.imdecode, auto-rename su collisione.
Toolbar UI: bottone 'Carica file', dopo upload ricarica picker.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

pm2d/web/server.py

@@ -329,6 +329,49 @@ def index():
     return HTMLResponse(html_path.read_text(encoding="utf-8"))
 
 
+@app.post("/upload_to_folder")
+async def upload_to_folder(file: UploadFile = File(...)):
+    """Salva file caricato nella cartella IMAGES_DIR. Ritorna lista aggiornata."""
+    if not IMAGES_DIR.is_dir():
+        raise HTTPException(500, f"IMAGES_DIR non esiste: {IMAGES_DIR}")
+    # Sanitizza nome file (no traversal)
+    name = Path(file.filename or "upload.png").name
+    if not name:
+        raise HTTPException(400, "nome file vuoto")
+    ext = Path(name).suffix.lower()
+    allowed = {".png", ".jpg", ".jpeg", ".bmp", ".tif", ".tiff"}
+    if ext not in allowed:
+        raise HTTPException(400, f"estensione non supportata: {ext}")
+    # Leggi contenuto e valida come immagine
+    data = await file.read()
+    arr = np.frombuffer(data, dtype=np.uint8)
+    img = cv2.imdecode(arr, cv2.IMREAD_COLOR)
+    if img is None:
+        raise HTTPException(400, "file non è un'immagine valida")
+    # Evita overwrite: se esiste, aggiungi suffisso numerico
+    target = IMAGES_DIR / name
+    if target.exists():
+        stem = target.stem; suffix = target.suffix
+        i = 1
+        while True:
+            alt = IMAGES_DIR / f"{stem}_{i}{suffix}"
+            if not alt.exists():
+                target = alt; break
+            i += 1
+    # Scrivi su disco
+    with open(target, "wb") as f:
+        f.write(data)
+    # Ritorna lista aggiornata
+    return {
+        "saved_as": target.name,
+        "dir": str(IMAGES_DIR),
+        "files": sorted(
+            p.name for p in IMAGES_DIR.iterdir()
+            if p.is_file() and p.suffix.lower() in allowed
+        ),
+    }
+
+
 @app.get("/folder_image/{filename}")
 def folder_image(filename: str, w: int = 120):
     """Serve thumbnail PNG dell'immagine IMAGES_DIR (scalata a width w)."""

pm2d/web/static/app.js

@@ -82,6 +82,21 @@ async function fetchImagesList() {
   return await r.json();
 }
 
+async function uploadToFolder(file) {
+  const fd = new FormData();
+  fd.append("file", file);
+  const r = await fetch("/upload_to_folder", { method: "POST", body: fd });
+  if (!r.ok) throw new Error(await r.text());
+  return await r.json();
+}
+
+async function refreshPickers() {
+  const {files, dir} = await fetchImagesList();
+  buildThumbPicker("picker-model", files, onSelectModel);
+  buildThumbPicker("picker-scene", files, onSelectScene);
+  return {files, dir};
+}
+
 function buildThumbPicker(pickerId, files, onSelect) {
   const picker = document.getElementById(pickerId);
   const current = picker.querySelector(".picker-current");
@@ -351,14 +366,28 @@ window.addEventListener("DOMContentLoaded", async () => {
   buildAdvancedForm();
   setupROI();
   // Popola picker immagini da IMAGES_DIR (con thumbnail)
-  const {files, dir} = await fetchImagesList();
+  const {files, dir} = await refreshPickers();
-  buildThumbPicker("picker-model", files, onSelectModel);
-  buildThumbPicker("picker-scene", files, onSelectScene);
   if (files.length === 0) {
-    setStatus(`Nessuna immagine in ${dir} (configura IMAGES_DIR in .env)`);
+    setStatus(`Nessuna immagine in ${dir} (carica file o configura IMAGES_DIR)`);
   } else {
-    setStatus(`${files.length} immagini disponibili in ${dir}`);
+    setStatus(`${files.length} immagini in ${dir}`);
   }
+
+  // Upload file nella folder
+  const upEl = document.getElementById("file-upload");
+  upEl.addEventListener("change", async (e) => {
+    const f = e.target.files[0];
+    if (!f) return;
+    setStatus(`Caricamento ${f.name} nella cartella...`);
+    try {
+      const res = await uploadToFolder(f);
+      await refreshPickers();
+      setStatus(`Salvato come ${res.saved_as} (${res.files.length} file totali)`);
+    } catch (err) {
+      setStatus(`Errore upload: ${err.message}`);
+    }
+    e.target.value = "";  // consente re-upload stesso file
+  });
   document.getElementById("btn-match").addEventListener("click", doMatch);
   const slider = document.getElementById("p-min-score");
   slider.addEventListener("input", (e) => {

pm2d/web/static/index.html

@@ -26,6 +26,10 @@
       <div class="picker-list"></div>
     </div>
     <button class="btn btn-go" id="btn-match">▶ MATCH</button>
+    <label class="btn" title="Carica nuovo file nella cartella immagini">
+      ⬆ Carica file
+      <input type="file" id="file-upload" accept="image/*" hidden>
+    </label>
     <span id="status">Seleziona modello, disegna ROI, seleziona scena</span>
   </div>
 </header>