feat(FN-1445): add project-scoping and fallback handling for AI routes and missions

- Add projectId parameter to refineText API and TaskForm for proper scoping
- Update mission routes to require projectId and add regression tests
- Add mission interview fallback to mission-level context when target not found
- Add AI refine route scoping tests for project isolation
- Update component tests to expect projectId argument
- Update prompt-keys test counts for new system prompts

packages/dashboard/app/components/__tests__/QuickEntryBox.test.tsx

@@ -1665,7 +1665,7 @@ describe("QuickEntryBox", () => {
       fireEvent.click(screen.getByTestId("refine-clarify"));
 
       await waitFor(() => {
-        expect(refineText).toHaveBeenCalledWith("Original text", "clarify");
+        expect(refineText).toHaveBeenCalledWith("Original text", "clarify", TEST_PROJECT_ID);
       });
 
       // Textarea should be updated