QPI-UI: dashboard only submits single circuit

[ch-ahindura]

Describe the bug
The qpi-ui dashboard's Jobs Console can only submit a single circuit per job. The backend JobPayload and all three client SDKs (Python, JavaScript, Go) accept a list of circuits with per-circuit parameter_values and shots overrides, but the dashboard exposes none of this.

The Job Submission panel (qpi-ui/internal/dashboard/src/components/tabs/JobsConsoleTab/elements/JobSubmissionPanel.tsx) holds a single QASM string in state (qasmCode) with one textarea, and its onSubmitJob callback is typed to take a single qasm: string. The submit handler in qpi-ui/internal/dashboard/src/App.tsx (handleSubmitQuantumJob) then hard-codes the request body as:

body: JSON.stringify({
  circuits: [{ circuit: qasm }],   // always exactly one circuit
  shots: shots,
  meas_level: measLevel,
  meas_return: "single",
  qpu_target: qpuId,
}),

So there is no way from the UI to submit a batch of circuits, to set parameter_values for a parametrized circuit, or to give a circuit its own shots override. By contrast:

• Python client submit_job(circuits: list[dict], ...) posts {"circuits": circuits} and documents optional parameter_values/shots per circuit.
• JS client JobSubmitRequest.circuits: CircuitPayload[], where CircuitPayload has circuit, parameter_values?, shots?.
• Go client JobSubmitRequest.Circuits []CircuitPayload, where CircuitPayload has Circuit, ParameterValues, Shots.

To Reproduce
Steps to reproduce the behavior:

1. Open the dashboard and go to the Jobs Console tab.
2. Open the Job Submission panel — there is a single OpenQASM 3.0 textarea, a Shots Count field, and a Meas Level slider.
3. Try to add a second circuit, or set parameter bindings / a per-circuit shot count.
4. See that there is no control to do so; only one circuit can ever be sent.

Expected behavior
The dashboard should let a user submit multiple circuits in one job (matching the backend and the client SDKs), for example by allowing several QASM editors / a list of circuits to be added and removed, with optional per-circuit shots and parameter_values. The submitted request body should populate circuits with all of them rather than wrapping a single QASM string in a one-element array. At minimum, if batches are intentionally out of scope for the UI, this limitation should be documented.

Screenshots
N/A.

Desktop (please complete the following information):

• OS: N/A (platform-independent web UI)
• Browser: any
• Version: qpi-ui dashboard — src/components/tabs/JobsConsoleTab/elements/JobSubmissionPanel.tsx and src/App.tsx (handleSubmitQuantumJob)

Smartphone (please complete the following information):

• Device: N/A
• OS: N/A
• Browser: N/A
• Version: N/A

Additional context
The Python, JavaScript, and Go clients already support multi-circuit submission (including per-circuit parameter_values and shots), so this gap is specific to the dashboard UI. Severity: Medium — no data loss, but batched and parametrized jobs are simply not reachable through the dashboard, forcing users to drop down to a client SDK.

[Tinitto]

Add it to TODO for v0.1