story-kit: create 122_story_test_coverage_http_ws_rs

.story_kit/work/1_upcoming/122_story_test_coverage_http_ws_rs.md

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+---
+name: "Add test coverage for http/ws.rs (0% -> 50%+)"
+---
+
+# 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