docs: replace english locale mirrors with translated landing pages

docs/es/environment.md

@@ -1,81 +0,0 @@
----
-summary: "Where OpenClaw loads environment variables and the precedence order"
-read_when:
-  - You need to know which env vars are loaded, and in what order
-  - You are debugging missing API keys in the Gateway
-  - You are documenting provider auth or deployment environments
-title: "Environment Variables"
----
-
-# Environment variables
-
-OpenClaw pulls environment variables from multiple sources. The rule is **never override existing values**.
-
-## Precedence (highest → lowest)
-
-1. **Process environment** (what the Gateway process already has from the parent shell/daemon).
-2. **`.env` in the current working directory** (dotenv default; does not override).
-3. **Global `.env`** at `~/.openclaw/.env` (aka `$OPENCLAW_STATE_DIR/.env`; does not override).
-4. **Config `env` block** in `~/.openclaw/openclaw.json` (applied only if missing).
-5. **Optional login-shell import** (`env.shellEnv.enabled` or `OPENCLAW_LOAD_SHELL_ENV=1`), applied only for missing expected keys.
-
-If the config file is missing entirely, step 4 is skipped; shell import still runs if enabled.
-
-## Config `env` block
-
-Two equivalent ways to set inline env vars (both are non-overriding):
-
-```json5
-{
-  env: {
-    OPENROUTER_API_KEY: "sk-or-...",
-    vars: {
-      GROQ_API_KEY: "gsk-...",
-    },
-  },
-}
-```
-
-## Shell env import
-
-`env.shellEnv` runs your login shell and imports only **missing** expected keys:
-
-```json5
-{
-  env: {
-    shellEnv: {
-      enabled: true,
-      timeoutMs: 15000,
-    },
-  },
-}
-```
-
-Env var equivalents:
-
-- `OPENCLAW_LOAD_SHELL_ENV=1`
-- `OPENCLAW_SHELL_ENV_TIMEOUT_MS=15000`
-
-## Env var substitution in config
-
-You can reference env vars directly in config string values using `${VAR_NAME}` syntax:
-
-```json5
-{
-  models: {
-    providers: {
-      "vercel-gateway": {
-        apiKey: "${VERCEL_GATEWAY_API_KEY}",
-      },
-    },
-  },
-}
-```
-
-See [Configuration: Env var substitution](/gateway/configuration#env-var-substitution-in-config) for full details.
-
-## Related
-
-- [Gateway configuration](/gateway/configuration)
-- [FAQ: env vars and .env loading](/help/faq#env-vars-and-env-loading)
-- [Models overview](/concepts/models)