Add NRC (Nostr Relay Connect) protocol and web UI (v0.48.9)

- Implement NIP-NRC protocol for remote relay access through public relay tunnel
- Add NRC bridge service with NIP-44 encrypted message tunneling
- Add NRC client library for applications
- Add session management with subscription tracking and expiry
- Add URI parsing for nostr+relayconnect:// scheme with secret and CAT auth
- Add NRC API endpoints for connection management (create/list/delete/get-uri)
- Add RelayConnectView.svelte component for managing NRC connections in web UI
- Add NRC database storage for connection secrets and labels
- Add NRC CLI commands (generate, list, revoke)
- Add support for Cashu Access Tokens (CAT) in NRC URIs
- Add ScopeNRC constant for Cashu token scope
- Add wasm build infrastructure and stub files

Files modified:
- app/config/config.go: NRC configuration options
- app/handle-nrc.go: New API handlers for NRC connections
- app/main.go: NRC bridge startup integration
- app/server.go: Register NRC API routes
- app/web/src/App.svelte: Add Relay Connect tab
- app/web/src/RelayConnectView.svelte: New NRC management component
- app/web/src/api.js: NRC API client functions
- main.go: NRC CLI command handlers
- pkg/bunker/acl_adapter.go: Add NRC scope mapping
- pkg/cashu/token/token.go: Add ScopeNRC constant
- pkg/database/nrc.go: NRC connection storage
- pkg/protocol/nrc/: New NRC protocol implementation
- docs/NIP-NRC.md: NIP specification document

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/build-wasm.sh

@@ -0,0 +1,65 @@
+#!/bin/bash
+# Build the WasmDB WASM module for browser use
+#
+# Output: wasmdb.wasm in the repository root
+#
+# Usage:
+#   ./scripts/build-wasm.sh
+#   ./scripts/build-wasm.sh --output /path/to/output/wasmdb.wasm
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
+
+OUTPUT_PATH="${REPO_ROOT}/wasmdb.wasm"
+
+# Parse arguments
+while [[ $# -gt 0 ]]; do
+    case $1 in
+        --output|-o)
+            OUTPUT_PATH="$2"
+            shift 2
+            ;;
+        *)
+            echo "Unknown option: $1"
+            exit 1
+            ;;
+    esac
+done
+
+echo "Building WasmDB WASM module..."
+echo "Output: ${OUTPUT_PATH}"
+
+cd "${REPO_ROOT}"
+
+# Build with optimizations
+GOOS=js GOARCH=wasm go build \
+    -ldflags="-s -w" \
+    -o "${OUTPUT_PATH}" \
+    ./cmd/wasmdb
+
+# Get the size
+SIZE=$(du -h "${OUTPUT_PATH}" | cut -f1)
+echo "Build complete: ${OUTPUT_PATH} (${SIZE})"
+
+# Copy wasm_exec.js from Go installation if not present
+WASM_EXEC="${REPO_ROOT}/wasm_exec.js"
+if [ ! -f "${WASM_EXEC}" ]; then
+    GO_ROOT=$(go env GOROOT)
+    # Try lib/wasm first (newer Go versions), then misc/wasm
+    if [ -f "${GO_ROOT}/lib/wasm/wasm_exec.js" ]; then
+        cp "${GO_ROOT}/lib/wasm/wasm_exec.js" "${WASM_EXEC}"
+        echo "Copied wasm_exec.js to ${WASM_EXEC}"
+    elif [ -f "${GO_ROOT}/misc/wasm/wasm_exec.js" ]; then
+        cp "${GO_ROOT}/misc/wasm/wasm_exec.js" "${WASM_EXEC}"
+        echo "Copied wasm_exec.js to ${WASM_EXEC}"
+    else
+        echo "Warning: wasm_exec.js not found in Go installation"
+        echo "Checked: ${GO_ROOT}/lib/wasm/wasm_exec.js"
+        echo "Checked: ${GO_ROOT}/misc/wasm/wasm_exec.js"
+        echo "You'll need to copy it manually from your Go installation"
+    fi
+fi
+
+echo "Done!"