Improve song quality: backing humanization + Watts mode

.gitignore

@@ -22,3 +22,8 @@ output/*
 !output/.gitkeep
 samples/*
 !samples/.gitkeep
+
+# Local scratch / agent artifacts
+ab_check/
+.claude/
+1clear

config/moods/watts.yaml

@@ -0,0 +1,63 @@
+# Mood Machine - Watts preset
+# Contemplative spoken-word philosophy over a gentle lo-fi bed.
+
+mood: watts
+bpm: 72
+key: Am
+time_signature: 4/4
+
+lyrics_style: watts
+
+synth:
+  pad_filter_cutoff: 1300
+  pad_attack: 1.4
+  pad_release: 3.0
+  pad_detune_cents: 8
+  bass_character: warm
+  drum_tone: dark
+
+drums:
+  pattern_style: sparse
+  swing: 0.60
+  velocity_variation: 0.18
+  hihat_density: 0.4
+
+vocals:
+  tts_speed: slow
+  tts_voice: en-GB-ThomasNeural   # warm, mature British
+  tts_rate: "-12%"                # unhurried
+  reverb_wet: 0.28
+  reverb_room: 0.70               # lecture-hall space
+  delay_wet: 0.05
+  delay_time_beats: 3
+
+vocal_engine: edge-tts
+voice: watts
+
+textures:
+  vinyl_crackle_level: 0.10
+  ambient_level: 0.10
+  tape_hiss_level: 0.04
+
+levels:                  # vocal-led: voice upfront, backing a soft bed
+  kick: -5
+  snare: -7
+  hihat: -14
+  bass: -7
+  pads: -13
+  vocals: 8
+  textures: -22
+
+arrangement:
+  intro_bars: 8
+  verse1_bars: 16
+  break_bars: 4
+  verse2_bars: 16
+  bridge_bars: 8
+  outro_bars: 8
+
+progression:
+  - { root: A, type: minor7, bars: 2 }
+  - { root: C, type: major7, bars: 2 }
+  - { root: D, type: minor7, bars: 2 }
+  - { root: E, type: dom7,   bars: 2 }