v0.0.44: web UI polish — ETH display, peer input, call fixes, docs

Web UI:
- Peer input Enter key now resolves ETH/@alias (like /peer command)
- ETH address stored and shown everywhere instead of raw fingerprint
- Call UI shows ETH address: "Calling 0x0021...", "In call with 0x9D70..."
- Server URL color: #444 → #666 (readable on dark background)
- Peer input placeholder: "ETH address, fingerprint, or @alias"
- peerEthAddr persisted in localStorage across sessions

Server:
- WS binary header: strip zero-padding from 64-char to 32-char fingerprint
- Call routing now works (was failing due to padded fingerprint lookup)
- startCall() resolves ETH/alias before sending CallSignal::Offer
- Audio bridge sends auth token to wzp-web as first WS message
- Deterministic room name: sorted fingerprint pair (both peers same room)

Docs updated:
- SERVER.md: WZP integration section (components, running, TLS, auth flow)
- USAGE.md: voice call usage for web and TUI
- LLM_HELP.md: call architecture, key files, environment vars
- LLM_BOT_DEV.md: note that bots cannot participate in calls
- TESTING_E2E.md: updated WZP prerequisites with correct flags

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

warzone/docs/USAGE.md

@@ -287,6 +287,32 @@ The web client supports the same slash commands as the TUI: `/peer`, `/p`, `/r`,
 
 ---
 
+## Voice Calls
+
+### Web Client
+1. Set a peer (paste ETH address or use `/peer @alias`)
+2. Click the Call button or type `/call`
+3. Peer sees "Incoming call" and clicks Accept
+4. Both allow microphone access
+5. Audio flows -- speak normally
+6. Click "End Call" or type `/hangup` to end
+
+### TUI Client
+1. `/call <peer_address>` -- initiate call
+2. Peer sees notification and can use `/accept` or `/reject`
+3. Audio currently requires web client (TUI shows hint)
+4. `/hangup` -- end call
+
+### Commands
+| Command | Description |
+|---------|-------------|
+| `/call` | Start voice call with current peer |
+| `/accept` | Accept incoming call |
+| `/reject` | Reject incoming call |
+| `/hangup` | End current call |
+
+---
+
 ## Groups
 
 ### Creating and Using Groups