feat(FN-3153): add drag-and-drop provider reorder with Quick Chat FAB and p

Merged work adds a Quick Chat FAB with a slash-triggered menu and resizable chat panel (FN-3152), provider reorder drag-and-drop with persistent order storage (FN-3153, Steps 2/3/5/6), planning comment input to mission and milestone slice interview modals (FN-3139), and a regression test for descrip

Fusion-Task-Id: FN-3153

packages/dashboard/app/utils/__tests__/projectStorage.test.ts

@@ -89,10 +89,11 @@ describe("projectStorage", () => {
         "kb-usage-view-mode",
         "kb-usage-hidden-windows",
         "kb-usage-modal-size",
+        "kb-usage-provider-order",
         "kb-chat-active-session",
       ]),
     );
-    expect(PROJECT_STORAGE_KEYS).toHaveLength(16);
+    expect(PROJECT_STORAGE_KEYS).toHaveLength(17);
   });
 
   it("has no overlap between global and project-scoped keys", () => {