initial: gitea-bot — mochi 全站 issue/PR 自动处理

systemd --user unit, polls famzheng.me/gitea every 60s, dispatches
`claude --dangerously-skip-permissions -p ...` per new activity.
sqlite state, log to ~/.local/state/gitea-bot/bot.log.

Makefile

@@ -0,0 +1,34 @@
+.PHONY: install uninstall restart status logs test-once
+
+UNIT_DIR := $(HOME)/.config/systemd/user
+STATE_DIR := $(HOME)/.local/state/gitea-bot
+
+install:
+	@test -f $(HOME)/.gitea-mochi-token || (echo "missing $(HOME)/.gitea-mochi-token"; exit 1)
+	@test -x /home/fam/.local/bin/claude || (echo "missing claude bin"; exit 1)
+	mkdir -p $(UNIT_DIR) $(STATE_DIR)
+	install -m 644 gitea-bot.service $(UNIT_DIR)/gitea-bot.service
+	systemctl --user daemon-reload
+	systemctl --user enable --now gitea-bot
+	@sleep 1
+	systemctl --user status gitea-bot --no-pager -l | head -25
+
+uninstall:
+	-systemctl --user disable --now gitea-bot
+	rm -f $(UNIT_DIR)/gitea-bot.service
+	systemctl --user daemon-reload
+
+restart:
+	systemctl --user restart gitea-bot
+	systemctl --user status gitea-bot --no-pager -l | head -10
+
+status:
+	systemctl --user status gitea-bot --no-pager -l | head -25
+
+logs:
+	tail -n 200 -f $(STATE_DIR)/bot.log
+
+test-once:
+	@# 单次轮询：reset state.db 让所有未处理 issue 都被 dispatch（慎用）
+	MOCHI_TOKEN=$$(cat $(HOME)/.gitea-mochi-token) python3 -c \
+	  "import bot; bot.poll_once(bot.init_state(bot.CONFIG['state_dir']/'state.db'), open('$(HOME)/.gitea-mochi-token').read().strip())"