refactor(frontend): deduplicate CSS keyframes, unify types, extract format utils, add UI states, trim mock data

- Remove duplicate @keyframes pulse-* from 3 component files (already in nexus-tokens.css)
- Rename AgentDetail → AgentDetailData in dashboard types to avoid collision with types/agent.ts
- Extract shared formatNumber/initials/formatTime to utils/format.ts
- Simplify FlowBoard: use agentStore modal/selection getters instead of duplicating local state
- Add error banner + empty state to IrisChat; add loading skeleton + error/empty states to TaskStrip
- Remove 105-line unused mockAgents array from useFlowLayout
- Reduce operations store fallbacks from hardcoded preview data to minimal safe defaults
- Update operations store tests to match lean fallback structure
- Net: -73 lines, cleaner imports, fewer magic strings

frontend/src/stores/operations.ts

@@ -4,36 +4,15 @@ import { apiFetch } from '../services/api'
 
 const fallback: OperationsSnapshot = {
   generatedAt: new Date().toISOString(),
-  runtime: { runtime: 'OpenClaw', status: 'Online', detail: 'Gateway responding' },
-  models: [
-    { provider: 'OpenClaw', model: 'deepseek/deepseek-v4-flash', status: 'Online', isLocal: false, detail: 'Programmer agent' },
-    { provider: 'OpenClaw', model: 'deepseek/deepseek-v4-pro', status: 'Online', isLocal: false, detail: 'Reviewer agent' },
-    { provider: 'OpenClaw', model: 'openai/gpt-5.3-chat-latest', status: 'Online', isLocal: false, detail: 'Iris orchestrator' },
-  ],
-  metrics: { activeAgents: 3, queuedTasks: 7, successRate: 98.4, incidents: 0 },
-  projects: [
-    { id: 'nexus', name: 'Nexus', status: 'Active', progress: 18 },
-    { id: 'openclaw', name: 'OpenClaw Runtime', status: 'Online', progress: 100 },
-    { id: 'infra', name: 'Noveria Infrastructure', status: 'Stable', progress: 74 },
-  ],
-  tasks: [
-    { id: 'preview-foundation', title: 'Nexus foundation', state: 'In progress', priority: 'Critical', updatedAt: new Date().toISOString() },
-    { id: 'preview-runtime', title: 'Connect OpenClaw adapter', state: 'In progress', priority: 'High', updatedAt: new Date().toISOString() },
-    { id: 'preview-routing', title: 'Configure model routing', state: 'In progress', priority: 'High', updatedAt: new Date().toISOString() },
-    { id: 'preview-auth', title: 'Owner authentication', state: 'Done', priority: 'Critical', updatedAt: new Date().toISOString() },
-  ],
-  activity: [
-    { type: 'runtime', message: 'OpenClaw runtime health checked', at: new Date().toISOString() },
-    { type: 'deploy', message: 'Nexus foundation initialized', at: new Date(Date.now() - 720000).toISOString() },
-    { type: 'deploy', message: 'Model routing configured for DeepSeek agents', at: new Date(Date.now() - 1140000).toISOString() },
-  ],
+  runtime: { runtime: 'OpenClaw', status: 'Unknown', detail: 'Awaiting connection…' },
+  models: [],
+  metrics: { activeAgents: 0, queuedTasks: 0, successRate: 0, incidents: 0 },
+  projects: [],
+  tasks: [],
+  activity: [],
 }
 
-const fallbackRouting: RoutingTarget[] = [
-  { priority: 1, provider: 'OpenClaw', model: 'deepseek/deepseek-v4-flash', purpose: 'Programmer agent', status: 'Online', detail: 'Routed through OpenClaw' },
-  { priority: 2, provider: 'OpenClaw', model: 'deepseek/deepseek-v4-pro', purpose: 'Reviewer agent', status: 'Online', detail: 'Routed through OpenClaw' },
-  { priority: 3, provider: 'OpenClaw', model: 'openai/gpt-5.3-chat-latest', purpose: 'Iris orchestrator', status: 'Online', detail: 'Routed through OpenClaw' },
-]
+const fallbackRouting: RoutingTarget[] = []
 
 export const useOperationsStore = defineStore('operations', {
   state: () => ({