v4.0.0 — remove deprecated tool aliases

Breaking change. The 58 deprecated tool aliases left by the #120 consolidation (shipped in v3.0.0) are removed now that their deprecation window — the entire 3.0.x line — has closed. tools/list drops from 84 → 26.

Breaking

Every removed alias maps to a consolidated tool:

• write/append/insert/replace/clear → edit_pattern({ mode })
• play/pause/stop → playback({ action })
• save/load/list → pattern_store({ action })
• status/show_errors/performance_report/memory_usage → diagnostics({ level })
• screenshot/show_browser → browser_window({ action })
• undo/redo/list_history/restore_history/compare_patterns → history({ action })
• analyze_spectrum/analyze_rhythm/detect_tempo/detect_key → analyze({ include: [...] })
• transpose/reverse/stretch/quantize/humanize/generate_variation/add_swing/apply_scale → transform({ op })
• add_effect/remove_effect → effect({ action })
• shift_mood/set_energy/refine → shape({ dimension })
• generate_drums/generate_bassline/generate_melody/generate_fill → generate_part({ role })
• generate_scale/generate_chord_progression → music_theory({ query })
• generate_euclidean/generate_polyrhythm → generate_rhythm({ type })
• start_audio_capture/stop_audio_capture/capture_audio_sample → audio_capture({ action })
• create_session/destroy_session/list_sessions/switch_session → session({ action })
• get_pattern_feedback/suggest_pattern_from_audio/jam_with → ai_assist({ task })
• generate_pattern → compose (auto-inits, auto-plays by default, returns a structured object; bpm arg is now tempo)

Fixed

• A latent bug surfaced during the test migration: the dispatcher's history-recording guard still matched the old alias names instead of edit_pattern, so undo/redo/history silently recorded nothing. Fixed.

Numbers

• 26 tools, 4 MCP resources
• 1709 tests pass, 0 fail, 20 skipped (browser)
• Net −1100 lines across 43 files

Full notes in CHANGELOG.md. Closes #178.