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.

pnpm-lock.yaml

@@ -3840,6 +3840,9 @@ importers:
       '@deepseek-ai/dsh-session':
         specifier: workspace:^
         version: link:../../core/session
+      '@deepseek-ai/dsh-session-telemetry':
+        specifier: workspace:^
+        version: link:../../session/session-telemetry
       '@deepseek-ai/dsh-user-id':
         specifier: workspace:^
         version: link:../../session/user-id