Add job brackets for grouping multi-part or repeated jobs

- JobBracket model: name, customer, notes
- Migration 0006: job_brackets table + bracket_id FK on print_jobs
- /brackets: list with per-bracket progress bar
- /brackets/{id}: detail with jobs table + Add Job(s) modal (quantity field
  creates N identical jobs in one shot, each with its own UUID and log entry)
- /jobs Add Job modal: optional bracket selector
- Sidebar: Brackets nav item added

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/routers/ui.py

@@ -10,6 +10,7 @@ from starlette.status import HTTP_303_SEE_OTHER
 
 from app.db import get_db
 from app.models.filament import Filament
+from app.models.job_bracket import JobBracket
 from app.models.job_log import JobLog
 from app.models.print_job import JobStatus, PrintJob
 from app.models.printer import Printer, PrinterStatus
@@ -135,6 +136,7 @@ def jobs_page(request: Request, q: str = "", db: Session = Depends(get_db)):
         "q": q,
         "printers": db.query(Printer).order_by(Printer.name).all(),
         "filaments": db.query(Filament).order_by(Filament.material, Filament.color).all(),
+        "brackets": db.query(JobBracket).order_by(JobBracket.name).all(),
         "stl_files": list_stl_files(),
     })
 
@@ -144,6 +146,7 @@ async def create_job(
     printer_id: str = Form(""),
     customer: str = Form(""),
     filament_id: str = Form(""),
+    bracket_id: str = Form(""),
     notes: str = Form(""),
     stl_file: UploadFile = File(None),
     stl_select: str = Form(""),
@@ -162,6 +165,7 @@ async def create_job(
         file_name=filename,
         printer_id=int(printer_id) if printer_id else None,
         filament_id=int(filament_id) if filament_id else None,
+        bracket_id=int(bracket_id) if bracket_id else None,
         customer=customer.strip() or None,
         notes=notes.strip() or None,
     )
@@ -172,6 +176,78 @@ async def create_job(
     return RedirectResponse(url="/jobs", status_code=HTTP_303_SEE_OTHER)
 
 
+# ── Brackets ───────────────────────────────────────────────────────────────────
+
+@router.get("/brackets", response_class=HTMLResponse)
+def brackets_page(request: Request, db: Session = Depends(get_db)):
+    return templates.TemplateResponse("brackets.html", {
+        "request": request,
+        "active": "brackets",
+        "brackets": db.query(JobBracket).order_by(JobBracket.created_at.desc()).all(),
+    })
+
+
+@router.post("/brackets")
+def create_bracket(
+    name: str = Form(...),
+    customer: str = Form(""),
+    notes: str = Form(""),
+    db: Session = Depends(get_db),
+):
+    db.add(JobBracket(name=name.strip(), customer=customer.strip() or None, notes=notes.strip() or None))
+    db.commit()
+    return RedirectResponse(url="/brackets", status_code=HTTP_303_SEE_OTHER)
+
+
+@router.get("/brackets/{bracket_id}", response_class=HTMLResponse)
+def bracket_detail(bracket_id: int, request: Request, db: Session = Depends(get_db)):
+    from fastapi import HTTPException
+    bracket = db.query(JobBracket).filter(JobBracket.id == bracket_id).first()
+    if not bracket:
+        raise HTTPException(status_code=404, detail="Bracket not found")
+    return templates.TemplateResponse("bracket_detail.html", {
+        "request": request,
+        "active": "brackets",
+        "bracket": bracket,
+        "filaments": db.query(Filament).order_by(Filament.material, Filament.color).all(),
+        "stl_files": list_stl_files(),
+    })
+
+
+@router.post("/brackets/{bracket_id}/jobs")
+async def add_jobs_to_bracket(
+    bracket_id: int,
+    quantity: int = Form(1),
+    filament_id: str = Form(""),
+    notes: str = Form(""),
+    stl_file: UploadFile = File(None),
+    stl_select: str = Form(""),
+    db: Session = Depends(get_db),
+):
+    filename = None
+    if stl_file and stl_file.filename:
+        filename = stl_file.filename
+        (get_stl_dir() / filename).write_bytes(await stl_file.read())
+    elif stl_select:
+        filename = stl_select
+
+    for _ in range(max(1, min(quantity, 500))):
+        job = PrintJob(
+            job_uuid=str(_uuid.uuid4()),
+            name=Path(filename).stem if filename else "Unnamed",
+            file_name=filename,
+            bracket_id=bracket_id,
+            filament_id=int(filament_id) if filament_id else None,
+            notes=notes.strip() or None,
+        )
+        db.add(job)
+        db.flush()
+        db.add(JobLog(job_id=job.id, message="Job created"))
+
+    db.commit()
+    return RedirectResponse(url=f"/brackets/{bracket_id}", status_code=HTTP_303_SEE_OTHER)
+
+
 # ── Filaments ──────────────────────────────────────────────────────────────────
 
 @router.get("/filaments", response_class=HTMLResponse)