Add local vision analysis scaffold

app/routes/documents.py

@@ -2191,6 +2191,24 @@ async def save_layout_review(document_id: str, request: Request, db: Session = D
 
 # --- layout review save helpers end ---
 
+@router.post("/{document_id}/run-vision-analysis", response_class=RedirectResponse)
+def run_vision_analysis(document_id: str, db: Session = Depends(get_db)):
+    document = db.query(Document).filter(Document.document_id == document_id).first()
+    if not document:
+        return RedirectResponse(
+            url=f"/documents/{document_id}?tab=layout-review&error=document_not_found",
+            status_code=303,
+        )
+
+    # Phase 1 placeholder.
+    # Next phase: render page image, send to local VLM service, store suggestions.
+    print(f"[vision-analysis] queued placeholder run for {document.document_id}", flush=True)
+
+    return RedirectResponse(
+        url=f"/documents/{document.document_id}?tab=layout-review&success=vision_analysis_started",
+        status_code=303,
+    )
+
 @router.get("/{document_id}", response_class=HTMLResponse)
 def document_detail(document_id: str, request: Request, queue: str | None = None, viewer_source: str = "scan", db: Session = Depends(get_db)):
     requested_tab = request.query_params.get("tab", "ocr-review")

app/templates/documents/detail.html

@@ -1916,6 +1916,9 @@ document.addEventListener("DOMContentLoaded", () => {
             <button type="button" class="layout-tool-btn" id="layout-tool-pan">Pan</button>
             <button type="button" class="layout-tool-btn" id="layout-tool-add">Add</button>
             <button type="button" class="layout-tool-btn danger" id="layout-delete-word">Delete</button>
+            <form method="post" action="/documents/{{ document.document_id }}/run-vision-analysis" style="display:inline;">
+              <button type="submit" class="layout-tool-btn">Run Vision</button>
+            </form>
           </div>
         <div class="word-ribbon-label">Tools</div>
       </div>