story-kit: queue 122_story_test_coverage_http_ws_rs for merge

.story_kit/work/3_qa/122_story_test_coverage_http_ws_rs.md

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-name: "Add test coverage for http/ws.rs (0% -> 50%+)"
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-# Story 122: Add test coverage for http/ws.rs
-
-Currently at 0% line coverage (160 lines). This is the WebSocket handler that powers the real-time UI — pipeline state pushes, chat streaming, permission requests, and reconciliation progress.
-
-## What to test
-
-- WebSocket message parsing (incoming WsRequest variants)
-- Pipeline state serialization to WsResponse
-- Message routing (chat, cancel, permission_response)
-- Connection lifecycle (open, close, reconnect handling server-side)
-- Broadcast channel subscription and message delivery
-
-## Notes
-
-- May need to set up a test server context or mock the broadcast channel
-- Focus on the message handling logic rather than actual WebSocket transport
-- Test the serialization/deserialization of all WsResponse variants
-
-## Acceptance Criteria
-
-- [ ] Line coverage for `http/ws.rs` reaches 50%+
-- [ ] Tests pass with `cargo test`
-- [ ] `cargo clippy` clean