Add project filter and zip export with photos

- Filter dropdown to display receipts by project
- Total banner updates to reflect filtered view
- Export produces a zip with Excel + receipt photos
- Photo filenames use project_date_amount_category format

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

server.py

@@ -8,10 +8,11 @@ import io
 import json
 import re
 import secrets
+import zipfile
 import sys
 from http.server import HTTPServer, BaseHTTPRequestHandler
 from http.cookies import SimpleCookie
-from urllib.parse import quote as urlquote
+from urllib.parse import quote as urlquote, urlparse, parse_qs
 
 import openpyxl
 from openpyxl.styles import Font, PatternFill, Alignment, Border, Side
@@ -327,18 +328,72 @@ class Handler(BaseHTTPRequestHandler):
                 self._send_error(502, str(e))
             return
 
-        # GET /api/export — export receipts as Excel
-        if self.path == "/api/export":
+        # GET /api/export — export receipts as Excel (optionally filtered by project)
+        # ?project=<id>  → zip with Excel + photos for that project
+        # ?project=none  → zip with Excel + photos for receipts with no project
+        # (no param)     → zip with Excel + photos for all receipts
+        if self.path.startswith("/api/export"):
             if not self._check_session():
                 return
             try:
+                parsed = urlparse(self.path)
+                qs = parse_qs(parsed.query)
+                project_filter = qs.get("project", [None])[0]
+
                 receipts = load_receipts()
-                body = build_excel(receipts)
+                if project_filter == "none":
+                    receipts = [r for r in receipts if not r.get("projectId")]
+                elif project_filter:
+                    receipts = [r for r in receipts if r.get("projectId") == project_filter]
+
+                # Load settings for name lookups
+                settings = load_settings()
+                project_map = {p["id"]: p for p in settings.get("projects", [])}
+                customer_map = {c["id"]: c for c in settings.get("customers", [])}
+
+                def sanitize(s):
+                    return re.sub(r'[^\w\s-]', '', s).strip().replace(" ", "_")
+
+                # Determine filename prefix
+                filename = "receipts"
+                if project_filter and project_filter != "none":
+                    proj = project_map.get(project_filter)
+                    if proj:
+                        cust = customer_map.get(proj.get("customerId", ""))
+                        parts = []
+                        if cust:
+                            parts.append(sanitize(cust["name"]))
+                        parts.append(sanitize(proj["name"]))
+                        filename = "-".join(parts) if parts else "receipts"
+
+                excel_bytes = build_excel(receipts)
+
+                # Build zip with Excel + photos
+                zip_buf = io.BytesIO()
+                with zipfile.ZipFile(zip_buf, "w", zipfile.ZIP_DEFLATED) as zf:
+                    zf.writestr(f"{filename}.xlsx", excel_bytes)
+                    for r in receipts:
+                        if r.get("photo"):
+                            try:
+                                photo_resp = nc_get(f"{PHOTOS_DIR}/{r['id']}.jpg")
+                                if photo_resp.status_code == 200:
+                                    # Name: project_date_amount_category
+                                    pid = r.get("projectId", "")
+                                    proj = project_map.get(pid)
+                                    proj_part = sanitize(proj["name"]) if proj else "no_project"
+                                    date_part = r.get("date", "")[:10]
+                                    amount_part = f"{r.get('amount', 0):.2f}"
+                                    cat_part = r.get("category", "other")
+                                    photo_name = f"{proj_part}_{date_part}_{amount_part}_{cat_part}.jpg"
+                                    zf.writestr(f"photos/{photo_name}", photo_resp.content)
+                            except Exception:
+                                pass  # skip photos that fail to download
+
+                body = zip_buf.getvalue()
                 self.send_response(200)
-                self.send_header("Content-Type",
-                                 "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
+                self.send_header("Content-Type", "application/zip")
                 self.send_header("Content-Disposition",
-                                 'attachment; filename="receipts.xlsx"')
+                                 f'attachment; filename="{filename}.zip"')
                 self.send_header("Content-Length", str(len(body)))
                 self.end_headers()
                 self.wfile.write(body)