fix(webapp): bump @slack/web-api to 7.16.0 for patched axios (#3796)

Bumps `@slack/web-api` 7.9.1 → 7.16.0 in the webapp and the two
`references` examples (d3-chat, d3-openai-agents). 7.16.0 depends on
`axios@^1.16.0`, so every slack-client axios path resolves to 1.16.1
instead of 1.15.1.

This clears the slack and references axios paths. `posthog-node`'s
transitive axios still resolves the older line - that's handled in a
follow-up that upgrades posthog-node to v5 (which drops the axios
dependency entirely and lets us retire the now-stale axios override).
The dependabot axios advisories fully close once both land.

Author: nicktrn

.server-changes/bump-slack-web-api-axios.md

@@ -0,0 +1,6 @@
+---
+area: webapp
+type: fix
+---
+
+Bump @slack/web-api to 7.16.0 so it resolves a patched axios (1.16.x)

apps/webapp/package.json

@@ -114,7 +114,7 @@
     "@remix-run/v1-meta": "^0.1.3",
     "@s2-dev/streamstore": "^0.22.10",
     "@sentry/remix": "9.46.0",
-    "@slack/web-api": "7.9.1",
+    "@slack/web-api": "7.16.0",
     "@socket.io/redis-adapter": "^8.3.0",
     "@tabler/icons-react": "^3.36.1",
     "@tailwindcss/container-queries": "^0.1.1",

pnpm-lock.yaml

@@ -31,7 +31,7 @@
     "@opentelemetry/instrumentation": "^0.203.0",
     "@opentelemetry/sdk-logs": "^0.203.0",
     "@radix-ui/react-avatar": "^1.1.3",
-    "@slack/web-api": "7.9.1",
+    "@slack/web-api": "7.16.0",
     "@trigger.dev/python": "workspace:*",
     "@trigger.dev/react-hooks": "workspace:*",
     "@trigger.dev/sdk": "workspace:*",

references/d3-chat/package.json

@@ -18,7 +18,7 @@
   },
   "dependencies": {
     "@ai-sdk/openai": "1.3.3",
-    "@slack/web-api": "7.9.1",
+    "@slack/web-api": "7.16.0",
     "@trigger.dev/python": "workspace:*",
     "@trigger.dev/react-hooks": "workspace:*",
     "@trigger.dev/sdk": "workspace:*",