Merge PR #2280: feat(cli): CLI v4 — Commander.js, 50+ commands, TUI, i18n, plugins (Phases 0-9)

Complete rewrite of the OmniRoute CLI:
- Commander.js-based modular architecture (50+ command files)
- Full i18n support (en + pt-BR, 1222 keys each)
- TUI interactive interface (OAuthFlow, EvalWatch, ProvidersTestAll)
- Plugin system (omniroute-cmd-*)
- OpenAPI codegen (omniroute api <tag> <op>)
- Commands: serve, combo, compression, keys, tunnel, backup, test-provider,
  health, memory, MCP, A2A, oauth, skills, webhooks, usage, cost, eval,
  context-eng, dashboard, doctor, env, files, logs, models, nodes, oneproxy,
  open, openapi, plugin, policy, pricing, providers, quota, registry, repl,
  reset-encrypted-columns, resilience, restart, runtime, sessions, setup,
  simulate, status, stop, stream, sync, tags, telemetry, translator, tray, update
- Code review fixes: C1-C3, I1-I5, M1-M4 applied

# Conflicts:
#	bin/cli/commands/config.mjs
#	bin/omniroute.mjs
#	package-lock.json
#	package.json

.env.example

@@ -815,6 +815,30 @@ APP_LOG_TO_FILE=true
 # Default: 256 (Docker) | system default (npm)
 # OMNIROUTE_MEMORY_MB=256
 
+# ── CLI helpers (bin/cli/) ──
+# Override UI language for CLI output. Accepts BCP-47 locale (e.g. en, pt-BR).
+# Falls back to LC_ALL / LC_MESSAGES / LANG / en if unset.
+# OMNIROUTE_LANG=en
+
+# Show server logs inline when running in supervised mode (omniroute serve).
+# Set to "1" to forward server stdout/stderr to the terminal.
+# Equivalent to the --log flag on `omniroute serve`.
+# OMNIROUTE_SHOW_LOG=1
+
+# Bearer token injected as x-omniroute-cli-token header for machine-auth (task 8.12).
+# Auto-generated on first run if machine-id is available; set manually to override.
+# OMNIROUTE_CLI_TOKEN=
+
+# Per-attempt HTTP timeout for CLI → server calls (milliseconds). Default: 30000.
+# OMNIROUTE_HTTP_TIMEOUT_MS=30000
+
+# Set to 1 to print retry/backoff details to stderr during CLI commands.
+# OMNIROUTE_VERBOSE=0
+
+# Custom directory for CLI plugin discovery (omniroute-cmd-* packages).
+# Default: ~/.omniroute/plugins/  Override in dev/CI to point at a local plugin tree.
+# OMNIROUTE_PLUGIN_PATH=
+
 # ── Prompt cache (system prompt deduplication) ──
 # Used by: open-sse/services — caches identical system prompts across requests.
 # PROMPT_CACHE_MAX_SIZE=50              # Max cached entries (default: 50)