feat: vault-aligned server v1 + UX polish

Redesign the optional FastAPI companion around vault files (manifest /
PUT/GET/DELETE + OCR jobs) instead of legacy strokes_json notes. Wire a
client Server settings panel for health/login. Polish shell UX: l10n for
settings/home/board, sticky-board empty state, and a narrow-screen
diagnostics FAB.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/badnote_server/routers/v1_ocr_router.py

@@ -0,0 +1,74 @@
+"""v1 OCR job API — upload ink raster, poll status, fetch text."""
+
+from __future__ import annotations
+
+import os
+import uuid
+from datetime import datetime, timezone
+
+from fastapi import APIRouter, Depends, File, Form, HTTPException, UploadFile, status
+
+from ..auth import get_current_user
+from ..config import settings
+from ..ocr import queue as ocr_queue
+
+router = APIRouter()
+
+
+@router.post("/jobs", status_code=status.HTTP_202_ACCEPTED)
+async def create_ocr_job(
+    image: UploadFile = File(...),
+    source_path: str = Form(""),
+    page_index: int = Form(0),
+    user_id: str = Depends(get_current_user),
+) -> dict:
+    """Enqueue an OCR job from an uploaded PNG/JPEG of handwriting."""
+    job_id = str(uuid.uuid4())
+    blob_dir = os.path.join(settings.storage_path, "ocr_blobs", user_id)
+    os.makedirs(blob_dir, exist_ok=True)
+    ext = os.path.splitext(image.filename or "ink.png")[1] or ".png"
+    blob_path = os.path.join(blob_dir, f"{job_id}{ext}")
+    data = await image.read()
+    if not data:
+        raise HTTPException(status.HTTP_400_BAD_REQUEST, detail="empty image")
+    with open(blob_path, "wb") as f:
+        f.write(data)
+
+    ocr_queue.enqueue(
+        {
+            "id": job_id,
+            "user_id": user_id,
+            "source_path": source_path,
+            "note_id": source_path or job_id,
+            "page_index": page_index,
+            "image_path": blob_path,
+            "created_at": datetime.now(timezone.utc).isoformat(),
+        }
+    )
+
+    return {
+        "job_id": job_id,
+        "status": "pending",
+        "source_path": source_path,
+        "page_index": page_index,
+    }
+
+
+@router.get("/jobs/{job_id}")
+async def get_ocr_job(
+    job_id: str,
+    user_id: str = Depends(get_current_user),
+) -> dict:
+    job = ocr_queue.get_status(job_id)
+    if job is None:
+        raise HTTPException(status.HTTP_404_NOT_FOUND, detail="job not found")
+    if job.get("user_id") not in (None, user_id):
+        raise HTTPException(status.HTTP_403_FORBIDDEN, detail="forbidden")
+    return {
+        "job_id": job_id,
+        "status": job.get("status"),
+        "result": job.get("result_text") or job.get("result") or job.get("text"),
+        "error": job.get("error_message") or job.get("error"),
+        "source_path": job.get("source_path"),
+        "page_index": job.get("page_index"),
+    }