Add crop refinement, finger removal, and local LLM naming

- vision/refine.py: tighten crops to the paper band (removes mat
  margins and hands beside receipts) and inpaint border-connected
  skin regions so fingers disappear from output
- llm/vision.py: identify documents with a local Ollama vision model
  (qwen2.5vl); extracts vendor/date/total/form code and flags quality
  issues (fingers, blur, glare); falls back to Tesseract when down
- pipeline: drop blank pages, dedupe consecutive captures of the same
  document, record refine/LLM fields in report and export summary

paperpod/naming/filename.py

@@ -32,11 +32,32 @@ def build_name(
     vendor: str | None,
     fallback_dt: datetime,
     max_vendor_len: int = 40,
+    form_code: str | None = None,
+    tax_year: str | None = None,
+    org_name: str | None = None,
 ) -> NamingResult:
     """date must already be normalized to YYYY-MM-DD, or None."""
     vendor_slug = slugify(vendor, max_vendor_len) if vendor else None
     ts = fallback_dt.strftime("%Y%m%d_%H%M%S")
 
+    # Tax slips: prefer 2023_T4_York_University over UNSORTED_t4_york_university_<timestamp>.
+    if form_code:
+        org_slug = slugify(org_name, max_vendor_len) if org_name else None
+        if not org_slug and vendor:
+            stripped = vendor
+            if stripped.upper().startswith(form_code.upper()):
+                stripped = stripped[len(form_code) :].strip()
+            org_slug = slugify(stripped, max_vendor_len) if stripped else None
+        year = tax_year or (date[:4] if date else None)
+        code = form_code.upper()
+        if year and org_slug:
+            return NamingResult(stem=f"{year}_{code}_{org_slug}", source="ocr")
+        if year:
+            return NamingResult(stem=f"{year}_{code}", source="ocr")
+        if org_slug:
+            return NamingResult(stem=f"{code}_{org_slug}", source="ocr")
+        return NamingResult(stem=code.lower(), source="ocr")
+
     if date and vendor_slug:
         return NamingResult(stem=f"{date}_{vendor_slug}", source="ocr")
     if date: