feat: googly desk pet — face engine, mood, touch reactions, EEPROM persistence

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

IDEA.md

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+# googly
+
+A standalone desk pet for Seth's desk at Google. Arduino Mega 2560 + 3.5" UNO-form
+8-bit ILI9486 touch shield. Plug into any USB power brick and it lives: a big
+expressive face (Cozmo/EVE style) that blinks, looks around, sleeps, and reacts
+to touch.
+
+- Tap = poke (surprise → happy; rapid pokes → dizzy spiral eyes)
+- Long press = pet (closed eyes, blush; hearts if it likes you enough)
+- 30 min ignored = sleep (z z z), any touch wakes it
+- Rare idle events: sneeze, yawn, watches a fly cross the screen
+- One mood value 0–100: interaction raises it, uptime decays it. Persisted in
+  EEPROM (write-throttled). It sulks but never dies — zero-guilt Tamagotchi.
+
+No network, no host, no SD needed. Face is drawn procedurally with GFX
+primitives; animation only redraws eye/mouth regions (full-screen redraw is too
+slow on the 8-bit bus).