Add a glowing orb power meter to the Workshop scene that reflects the
session balance in real time.
- power-meter.js: new Three.js module — transparent outer shell,
inner orb that scales 0→1 with fill fraction, lightning bolt overlay,
point light and equator ring accent; DOM text label projected above
the orb shows current sats. Color interpolates red→yellow→cyan.
Pulses bright on 'fill' event, quick flicker on 'drain'.
- session.js: imports meter helpers; tracks _sessionMax (initial
deposit); calls setMeterVisible/setMeterBalance in _applySessionUI;
triggers fill/drain pulses on payment and job deduction; exports
openSessionPanel() for click-to-open wiring; clears meter on
_clearSession.
- websocket.js: handles session_balance_update WS event — updates
fill level and fires pulse.
- interaction.js: adds registerClickTarget(group, callback) — wired
for both FPS pointer-lock and non-lock modes and short taps.
- main.js: wires initPowerMeter/updatePowerMeter/disposePowerMeter
into the build/animate/teardown cycle; registers meter as click
target that opens the session panel.
Fixes#17
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
