feat(069-B2): usage charts + Usage.vue + Dashboard switcher#571
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Spec 069 Stream B2 (frontend). Surfaces the activity-log usage aggregate (GET /api/v1/activity/usage, A3) as Web UI graphs. - usage/CallHistogram.vue, ResponseSizeRanking.vue (size-based token-sink proxy, FR-006), ErrorRateChart.vue (+ per-tool p50/p95 latency table), Timeline.vue (calls/errors stacked, honors window/filters, FR-008). - views/Usage.vue: tokens-saved headline from ServerTokenMetrics (FR-007), window selector (24h/7d/all), status/sort filters, empty/low-data state (FR-009), 30s auto-refresh against the cached snapshot. - Dashboard.vue: Overview<->Usage switcher (T016); Overview kept via v-show so its state survives a round-trip (SC-006); Usage code-split via defineAsyncComponent so the chart bundle/fetch don't block first paint (SC-004). - api.ts getActivityUsage() (T017) + UsageAggregateResponse types. - utils/usageFormat.ts shared formatters + palette. Covers T016-T023. Verified with a Playwright sweep (7/7, 0 console errors) against populated + empty instances; report kept local per QA-report policy. Related #745
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# Conflicts: # frontend/src/services/api.ts # frontend/src/views/Dashboard.vue
This was referenced Jun 2, 2026
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The 069-B1 switcher tests broke when 069-B2 (#571) swapped the inline usage panel for the real async Usage.vue. Two mount-side problems: - The usage panel wrapper carried v-if="usageEverActive", so it was absent from the DOM on first paint and the exists() assertion failed. Move the lazy gate onto the inner <Suspense> instead: the wrapper div is now always present (hidden via v-show), while the chart bundle + usage fetch inside UsageView still mount only on first switch (SC-004), and the Overview subtree is preserved across switches (SC-006). - shallowMount stubbed both <Suspense> and the async UsageView, so the real Usage.vue never rendered (no fetch, no window buttons). Un-stub Suspense and swap the async wrapper for an eagerly-imported Usage.vue so the fetch-on-activation and window-re-fetch logic actually runs; a dynamic import() never settles inside flushPromises + Suspense. Usage's chart grandchildren stay shallow-stubbed (no jsdom canvas). Related #571
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Spec 069 Stream B2 (Frontend/Vue) — MCP-752
Surfaces the activity-log usage aggregate (
GET /api/v1/activity/usage, shipped in A3 #565) as Web UI usage graphs. Covers tasks T016–T023.What's in it
components/usage/CallHistogram.vue— calls per tool (horizontal bars).components/usage/ResponseSizeRanking.vue— token-sink ranking by total response bytes, captioned as a size-based proxy for token cost (FR-006).components/usage/ErrorRateChart.vue— error-rate bars + per-tool p50/p95 latency table (T019).components/usage/Timeline.vue— stacked calls/errors over time, honoring the active window/filters (FR-008).views/Usage.vue— tokens-saved headline fromServerTokenMetrics(FR-007), window selector (24h/7d/all), status + sort filters, and an empty/low-data state (FR-009); light 30s auto-refresh against the cached snapshot.views/Dashboard.vue— Overview↔Usage switcher (T016). Overview is kept withv-showso its state survives a round-trip (SC-006); Usage is code-split viadefineAsyncComponentso the chart bundle + fetch don't block Dashboard first paint (SC-004 — confirmed: separate 13 kBUsage-*.jschunk).services/api.tsgetActivityUsage()(T017) +UsageAggregateResponsetypes.utils/usageFormat.ts— shared formatters + palette.Verification (T023)
Playwright sweep (CLAUDE.md Web-UI workflow) against a populated instance (everything server, 4 tools seeded via MCP) and a fresh empty instance:
vue-tsctypecheck clean;vite build+go build(embedded UI) green.HTML report + screenshots kept local (per repo QA-report policy), not committed.
PR — do not self-merge. Related #745.