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/models/__init__.py

@@ -1,5 +1,6 @@
 from app.models.base import Base
 from app.models.filament import Filament
+from app.models.job_bracket import JobBracket
 from app.models.job_log import JobLog
 from app.models.pricing import PricingConfig
 from app.models.print_job import PrintJob
@@ -8,4 +9,4 @@ from app.models.printer_log import PrinterLog
 from app.models.printer_type import PrinterType
 from app.models.todo import Todo
 
-__all__ = ["Base", "Printer", "PrinterLog", "PrinterType", "Filament", "JobLog", "PrintJob", "Todo", "PricingConfig"]
+__all__ = ["Base", "Printer", "PrinterLog", "PrinterType", "Filament", "JobBracket", "JobLog", "PrintJob", "Todo", "PricingConfig"]

app/models/job_bracket.py

@@ -0,0 +1,21 @@
+from datetime import datetime
+
+from sqlalchemy import DateTime, String, Text, func
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.models.base import Base
+
+
+class JobBracket(Base):
+    __tablename__ = "job_brackets"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    name: Mapped[str] = mapped_column(String(200))
+    customer: Mapped[str | None] = mapped_column(String(200))
+    notes: Mapped[str | None] = mapped_column(Text)
+    created_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now())
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime, server_default=func.now(), onupdate=func.now()
+    )
+
+    jobs: Mapped[list["PrintJob"]] = relationship(back_populates="bracket")

app/models/print_job.py

@@ -24,6 +24,7 @@ class PrintJob(Base):
     job_uuid: Mapped[str | None] = mapped_column(String(36), unique=True, default=lambda: str(_uuid.uuid4()))
     printer_id: Mapped[int | None] = mapped_column(ForeignKey("printers.id"))
     filament_id: Mapped[int | None] = mapped_column(ForeignKey("filaments.id"))
+    bracket_id: Mapped[int | None] = mapped_column(ForeignKey("job_brackets.id"))
     name: Mapped[str] = mapped_column(String(200))
     customer: Mapped[str | None] = mapped_column(String(200))
     file_name: Mapped[str | None] = mapped_column(String(255))
@@ -42,6 +43,7 @@ class PrintJob(Base):
 
     printer: Mapped["Printer"] = relationship(back_populates="jobs")
     filament: Mapped["Filament | None"] = relationship(back_populates="jobs")
+    bracket: Mapped["JobBracket | None"] = relationship(back_populates="jobs")
     logs: Mapped[list["JobLog"]] = relationship(
         back_populates="job", order_by="JobLog.created_at.desc()"
     )