fix(dashboard): repair desktop modal widths and NodesView CSS regressions

- Move misclassified .mesh-topology, .connect-node, .nodes-view-topology, .node-status-indicator, and pulse-warning keyframe from AgentReflectionsTab.css to NodesView.css; relocate node-related mobile @media rules from SettingsSyncLog.css so NodesView renders standalone
- Add missing CSS import on GitManagerModal so its .gm-* styles load without depending on ScriptsModal being mounted
- Bump desktop max-widths for FileBrowser, Terminal, GitManager, GitHubImport, and WorkflowStepManager modals; raise selector specificity to .modal.X so the base .modal { width: 480px } can't win the cascade

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/dashboard/app/components/ScriptsModal.css

@@ -1662,8 +1662,8 @@
    ══════════════════════════════════════════════════════════════════ */
 
 /* Modal size override - flex layout for sidebar + content */
-.gm-modal {
-  width: 900px;
+.modal.gm-modal {
+  width: 1400px;
   max-width: 95vw;
   max-height: 85vh;
   display: flex;