NS3 slice: Show diagnostics, errors, and job status consistently #21
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OBJECTIVE: Define compact status/error presentation for panels and core editor states so failures are local and recoverable.
AUTHORITY: Parent #3
NS3: Narrow terminal UI and panel grammar; PRODUCT.md; REQUIREMENTS.md (PRODUCT.md; req: ui/001-002; req: session/003).AGENT AUTHORITY:
PARENT: #3 via explicit issue link and parent checklist.
SCOPE: The smallest source/docs/tests needed to make this behavior real and verified.
BOUNDARIES: No notification system or telemetry.
ACCEPTANCE: Tests or traces show missing command, failed save, empty panel, and long message behavior without corrupting editor state.
VERIFICATION: Run the cheapest command that proves acceptance. Include regular tests for the intended payoff and adversarial tests for realistic failure, boundary, or regression cases. If no implementation test command exists yet, create/record the canonical command in AGENTS.md as part of the slice.
BLOCKERS: none
GOAL: Implement this vertical slice to the ACCEPTANCE above, keep the repo clean, cite relevant
req:anchors in code/tests where applicable, and close only after verification passes.Implemented in commit
e540e64d93(Show recoverable panel and editor feedback).Verification:
Regular tests: save status appears in the editor status area; empty generic panels render a local empty state; feedback remains width-bounded.
Adversarial tests: protocol errors such as invalid panel title render recoverable local messages without corrupting editor state; long feedback messages are clipped to the viewport width.
Boundary: local status/error/empty presentation only. No notification system, telemetry, diagnostics subsystem, job subsystem, or concrete file/git/LSP panels added.