feat(FN-3021): merge fusion/fn-3021

Commits merged:
- test(FN-3021): complete Step 2 — assert quick-chat scoped mobile tool-call rules
- feat(FN-3021): complete Step 1 — scope mobile quick-chat tool-call row override
- feat(FN-3021): complete Step 4 — document compact mobile quick-chat tool-call summaries
- fix(FN-3021): complete Step 3 — restore dashboard typecheck in custom providers
- test(FN-3021): complete Step 2 — add mobile quick-chat tool-call regression coverage
- feat(FN-3021): complete Step 1 — keep quick-chat tool-call summary single-line on mobile

Files changed:
docs/dashboard-guide.md                                      | 1 +
 packages/dashboard/app/components/CustomProvidersSection.tsx | 1 +
 packages/dashboard/app/components/QuickChatFAB.css           | 1 +
 3 files changed, 3 insertions(+)

Fusion-Task-Id: FN-3021

packages/dashboard/app/components/CustomProvidersSection.tsx

@@ -5,6 +5,7 @@ import {
   fetchCustomProviders,
   updateCustomProvider,
   type CustomProvider,
+  type CustomProviderConfig,
 } from "../api";
 import { AlertCircle, Loader2, Pencil, Plus, Trash2 } from "lucide-react";
 import { OnboardingDisclosure } from "./OnboardingDisclosure";

packages/dashboard/app/components/QuickChatFAB.css

@@ -718,6 +718,7 @@
 
   .quick-chat-panel .chat-tool-calls-group-status {
     justify-content: flex-end;
+    margin-left: auto;
   }
 }