fix(parser): compat with Claude Code v2.1.154 Dynamic Workflow entries

[delexw]

Summary

Claude Code v2.1.154 ships "dynamic workflows" — a system that lets Claude orchestrate background agents and track their progress. This feature writes new JSONL entry types and new top-level fields to session files that the parser must tolerate.

Changes

src-tauri/src/parser/entry.rs

Added four workflow state fields to Entry:

• workflowId (→ workflow_id) — workflow identifier
• workflowName (→ workflow_name) — human-readable name
• workflowRunUrl (→ workflow_run_url) — URL for the workflow run
• workflowStatus (→ workflow_status) — lifecycle status string

All four fields have #[serde(default)] so they default to "" on pre-v2.1.154 sessions. No #[serde(deny_unknown_fields)] is set on Entry, so additional future workflow fields are also tolerated automatically.

src-tauri/src/parser/classify.rs

Added five workflow lifecycle entry types to NOISE_ENTRY_TYPES:

• workflow-start
• workflow-progress
• workflow-complete
• workflow-cancelled
• workflow-error

These entries carry workflow state metadata but no displayable message content. Listing them explicitly in NOISE_ENTRY_TYPES ensures they are silently discarded before reaching the role-based fallback path, matching the same pattern used for fork-context-ref and queue-operation.

The existing tool_use extraction path in extract_assistant_details already handles any tool name generically, so the new Workflow tool block in assistant messages works without changes.

specs/01-parser-pipeline.md

Updated the Key Fields table and Version-Compatibility Normalisations table to document the new fields and entry types.

Tests Added

entry.rs (4 new tests):

• parse_entry_captures_workflow_fields_v2_1_154 — all four fields round-trip correctly
• parse_entry_workflow_fields_default_to_empty_when_absent — pre-v2.1.154 entries unaffected
• parse_entry_workflow_entry_with_unknown_fields_succeeds — future fields tolerated
• parse_entry_all_workflow_lifecycle_types_succeed — all five types parse without panicking

classify.rs (3 new tests):

• classify_drops_all_workflow_lifecycle_entry_types_as_noise — all five types silently dropped
• classify_workflow_tool_use_in_assistant_message_is_extracted — Workflow tool_use block extracted correctly
• classify_workflow_start_with_data_fields_is_still_dropped — lifecycle entries dropped even when carrying workflow fields

Verification

• 414 Rust tests pass (cargo test)
• cargo clippy -- -D warnings clean
• Frontend tests: 349 passed (vitest)

Fixes #115