Streaming Article Queue Progress Over SSE

Short summary

The author replaced an opaque loading spinner with a live SSE-driven stepper that reports meaningful stages (Researching, Generating, Verifying, Done) for an article generation queue. Progress callbacks are threaded through the actual generation pipeline so events reflect real work, not fake percentages. Per-slot persistence ensures partial successes survive individual slot failures, and a JSON fallback maintains backward compatibility for non-streaming clients.

• •SSE streams real progress stages (Researching, Generating, Verifying, Done) instead of an opaque spinner
• •Progress callbacks are threaded through the generation pipeline so events reflect actual work, not estimated timers
• •Per-slot persistence gives partial success first-class status; JSON fallback maintained for non-SSE clients

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