Wire vision candidate generation through backend module

app/logic/vision_analysis.py

@@ -0,0 +1,57 @@
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Any
+
+
+def analyze_document_image(image_path: str | Path, *, model_name: str = "placeholder") -> dict[str, Any]:
+    """
+    Backend-only vision analysis entrypoint.
+
+    Current phase:
+    - validates the image path
+    - returns a structured empty vision result
+
+    Future phase:
+    - call local Ollama / CV model
+    - detect regions, line-item zones, tables, logos, checkboxes, signatures
+    - return normalized page-coordinate candidates
+    """
+    path = Path(image_path)
+
+    return {
+        "schema_version": "vision_analysis_v1",
+        "engine": "local",
+        "model_name": model_name,
+        "status": "no_model_configured",
+        "image_path": str(path),
+        "layers": {
+            "vision_regions": [],
+            "vision_lines": [],
+            "vision_boxes": [],
+            "vision_fields": [],
+            "vision_line_items": [],
+        },
+        "notes": [
+            "Vision module scaffold is active.",
+            "No CV/Ollama model is connected yet.",
+        ],
+    }
+
+
+def build_vision_assisted_layout(source_layout: dict[str, Any] | None, vision_result: dict[str, Any]) -> dict[str, Any]:
+    """
+    Convert vision analysis into normal layout_json.
+
+    Current phase:
+    - preserves the current source layout
+    - tags it as vision-assisted
+    """
+    layout = dict(source_layout or {"pages": []})
+    layout["vision_assisted"] = True
+    layout["vision_assisted_status"] = vision_result.get("status", "unknown")
+    layout["vision_engine"] = vision_result.get("engine")
+    layout["vision_model_name"] = vision_result.get("model_name")
+    layout["layout_sync_source"] = "vision_assisted"
+    layout["layout_needs_review"] = True
+    return layout

app/routes/documents.py

@@ -27,6 +27,7 @@ from pdf2image import convert_from_path
 
 from app.core.storage_settings import get_default_save_root
 from app.db.deps import get_db
+from app.logic.vision_analysis import analyze_document_image, build_vision_assisted_layout
 from app.logic.document_outputs import (
     save_field_enriched_pdf_current,
     save_ocr_corrected_pdf_current,
@@ -2233,29 +2234,22 @@ def document_detail(document_id: str, request: Request, queue: str | None = None
                 .first()
             )
 
+            image_path = getattr(document_for_vision, "current_path", None) or getattr(document_for_vision, "source_path", None)
+            vision_result = analyze_document_image(image_path or "", model_name="placeholder")
             source_layout = source_version.layout_json if source_version and isinstance(source_version.layout_json, dict) else {"pages": []}
-            candidate_layout = deepcopy(source_layout)
-            candidate_layout["vision_assisted"] = True
-            candidate_layout["vision_assisted_status"] = "placeholder_copied_from_current_layout"
-            candidate_layout["layout_sync_source"] = "vision_assisted"
-            candidate_layout["layout_needs_review"] = True
+            candidate_layout = build_vision_assisted_layout(source_layout, vision_result)
 
             output = DocumentVisionAnalysisOutput(
                 document_id=document_for_vision.id,
-                engine="local_placeholder",
-                model_name="none",
+                engine=vision_result.get("engine", "local"),
+                model_name=vision_result.get("model_name"),
                 prompt_version="vision_candidate_v1",
                 output_type="layout_candidate",
                 analysis_json={
-                    "schema_version": "vision_analysis_v1",
-                    "status": "candidate_created_from_current_layout",
+                    **vision_result,
                     "document_id": document_id,
                     "source_text_version_id": source_version.id if source_version else None,
-                    "candidate_kind": "layout_json_copy_placeholder",
-                    "notes": [
-                        "Vision candidate scaffold created.",
-                        "Next step: replace copied boxes with local CV/Ollama-derived boxes and merge scoring."
-                    ],
+                    "candidate_kind": "layout_json_from_vision_module",
                 },
                 created_by="layout_review_run_vision",
             )