fix: deploy cleans stale kimi/moonshot config from server

The server's config.json and .env persist old moonshot/kimi values
across deploys. Even though env.Parse() overrides these at runtime,
stale config causes confusion. This commit:
- Removes old PICOCLAW_PROVIDERS_ZHIPU/MOONSHOT env vars from .env
- Force-updates config.json model/provider if they still reference
  kimi or moonshot

https://claude.ai/code/session_01MYemTMPtHrcgidWs8UdjcG

.github/workflows/deploy-hostinger.yml

@@ -118,6 +118,13 @@ jobs:
             echo "WARNING: PICOCLAW_ZAI_API_KEY secret is empty"
           fi
 
+          # Remove stale moonshot/zhipu env vars that conflict with Z.ai migration
+          for old_key in PICOCLAW_PROVIDERS_ZHIPU_API_KEY PICOCLAW_PROVIDERS_ZHIPU_API_BASE \
+                         PICOCLAW_PROVIDERS_MOONSHOT_API_KEY PICOCLAW_PROVIDERS_MOONSHOT_API_BASE \
+                         PICOCLAW_ZHIPU_API_KEY PICOCLAW_MOONSHOT_API_KEY; do
+            sed -i "/^\${old_key}=/d" "\$ENV_FILE" 2>/dev/null || true
+          done
+
           # Create config.json if it doesn't exist (copy from example)
           if [ ! -f "\$CONFIG_FILE" ]; then
             if [ -f "/opt/picoclaw/src/config/config.example.json" ]; then
@@ -126,6 +133,25 @@ jobs:
             fi
           fi
 
+          # Force-update model and provider in existing config.json to prevent
+          # stale kimi/moonshot values from persisting across deploys.
+          # env.Parse() overrides these at runtime, but keeping config.json
+          # consistent avoids confusion when debugging.
+          if [ -f "\$CONFIG_FILE" ]; then
+            # Update model if it still references kimi/moonshot
+            if grep -q '"model".*kimi\|"model".*moonshot' "\$CONFIG_FILE" 2>/dev/null; then
+              sed -i 's/"model"[[:space:]]*:[[:space:]]*"[^"]*kimi[^"]*"/"model": "glm-4.7"/' "\$CONFIG_FILE"
+              sed -i 's/"model"[[:space:]]*:[[:space:]]*"[^"]*moonshot[^"]*"/"model": "glm-4.7"/' "\$CONFIG_FILE"
+              echo "Updated config.json: replaced kimi/moonshot model with glm-4.7"
+            fi
+            # Update provider if it still references zhipu/moonshot
+            if grep -q '"provider".*zhipu\|"provider".*moonshot' "\$CONFIG_FILE" 2>/dev/null; then
+              sed -i 's/"provider"[[:space:]]*:[[:space:]]*"zhipu"/"provider": "zai"/' "\$CONFIG_FILE"
+              sed -i 's/"provider"[[:space:]]*:[[:space:]]*"moonshot"/"provider": "zai"/' "\$CONFIG_FILE"
+              echo "Updated config.json: replaced zhipu/moonshot provider with zai"
+            fi
+          fi
+
           # Verify critical config
           echo ""
           echo "=== Deploy Config Verification ==="