chore: stop tracking apps/coder/.env.host

Untrack the host env file (git rm --cached, kept on disk for the boocoder
service) and widen .gitignore to .env.* (re-including .env.example) so env
files no longer get committed. The file's prior contents (dev DB password +
internal Tailscale URLs; no API keys) remain in history — left as-is given the
single-user Tailscale-only threat model.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitignore

@@ -1,6 +1,8 @@
 node_modules
 dist
 .env
+.env.*
+!.env.example
 
 # Claude / Cursor (local agent & IDE config — CLAUDE.md and AGENTS.md stay tracked)
 .claude/

apps/coder/.env.host

@@ -1,17 +0,0 @@
-NODE_ENV=production
-PORT=9502
-HOST=100.114.205.53
-DATABASE_URL=postgres://boocode:devpass@127.0.0.1:5500/boochat
-LLAMA_SWAP_URL=http://100.101.41.16:8401
-PROJECT_ROOT_WHITELIST=/opt
-BOOTSTRAP_ROOT=/opt/projects
-DEFAULT_MODEL=qwen3.6-35b-a3b-mxfp4
-LOG_LEVEL=info
-SEARXNG_URL=http://100.114.205.53:8888
-GITEA_BASE_URL=https://git.indifferentketchup.com
-GITEA_USER=indifferentketchup
-GITEA_SSH_HOST=100.114.205.53:2222
-MCP_CONFIG_PATH=/data/mcp.json
-SKILLS_ROOT=/opt/boocode/data/skills
-CODER_PROVIDERS_PATH=/opt/boocode/data/coder-providers.json
-CLAUDE_SDK_BACKEND=1