Phase 5: Lightning auto-payout with LNURL-pay and NUT-05 melt

- New lnurl_pay.c/h: LNURL-pay protocol (GET .well-known/lnurlp + callback)
- New lightning_payout.c/h: threshold-based auto-payout with multi-recipient split
- Extended nucula_wallet bridge with nucula_wallet_melt() (NUT-05)
- Config: payout section with multi-mint, multi-recipient, fee_tolerance
- Default: enabled, TollGate@coinos.io, min_payout=128, min_balance=64
- 18 new unit tests (all passing), 134 total

1 files changed, 8 insertions, 2 deletions

diff --git a/tests/unit/Makefile b/tests/unit/Makefile
index e4ea388..f31172b 100644
--- a/tests/unit/Makefile
+++ b/tests/unit/Makefile
@@ -17,11 +17,11 @@ CFLAGS := -Wall -Wextra -Wno-unused-parameter -Wno-unused-function -Wno-sign-com
           -I $(SECP256K1_CFG) \
           -I /usr/include/cjson
 
-LDFLAGS := -lmbedcrypto -lcjson
+LDFLAGS := -lmbedcrypto -lcjson -lm
 
 SECP256K1_OBJ := secp256k1.o precomputed_ecmult.o precomputed_ecmult_gen.o
 
-TESTS := test_geohash test_identity test_nostr_event test_cashu test_session test_tollgate_client
+TESTS := test_geohash test_identity test_nostr_event test_cashu test_session test_tollgate_client test_lnurl_pay test_lightning_payout
 
 .PHONY: all test clean $(TESTS)
 
@@ -65,5 +65,11 @@ test_session: test_session.c $(REPO_ROOT)/main/session.c
 test_tollgate_client: test_tollgate_client.c
         $(CC) $(CFLAGS) $< -o $@ $(LDFLAGS)
 
+test_lnurl_pay: test_lnurl_pay.c
+        $(CC) $(CFLAGS) $< -o $@ $(LDFLAGS)
+
+test_lightning_payout: test_lightning_payout.c
+        $(CC) $(CFLAGS) $< -o $@ $(LDFLAGS)
+
 clean:
         rm -f $(TESTS) $(SECP256K1_OBJ)