Merge origin/master into worktree/web-plugin-config

Master gave the agent-preset nav its own glyph; this branch's plugins glyph
sits beside it, and both keep their own icon. Master's stricter
no-base-to-string rule also reaches this branch's new provider test, whose
fetch-call assertion now names the types it reads instead of stringifying an
unknown body.

apps/web/tsconfig.json

@@ -65,6 +65,7 @@
     "tests/agent-preset-selection.e2e.ts",
     "tests/agent-preset-authoring.e2e.ts",
     "tests/shipped-composition.e2e.ts",
+    "tests/feedback-command.e2e.ts",
     "tests/startup-auto-selection.e2e.ts",
     "tests/produced-files.e2e.ts",
     "tests/produced-file-mentions.e2e.ts",