chore(AI): lifecycleGraphs flag cleanup (#10942)

This PR cleans up the lifecycleGraphs flag. These changes were
automatically generated by AI and should be reviewed carefully.

Fixes #10941

## 🧹 AI Flag Cleanup Summary
This change removes the `lifecycleGraphs` feature flag and makes the
associated
feature permanently available. The lifecycle graphs on the insights page
are now
enabled for all Enterprise users.
### 🚮 Removed
- **Configuration**
- `lifecycleGraphs` flag definition from `IFlagKey` and `flags` object
in
`src/lib/types/experimental.ts`.
- `lifecycleGraphs` flag from `UiFlags` in
`frontend/src/interfaces/uiConfig.ts`.
- `lifecycleGraphs: true` from `src/server-dev.ts` development config.
- **UI**
- The `useUiFlag('lifecycleGraphs')` hook call and associated
conditional
rendering logic in `PerformanceInsights.tsx`.
### 🛠 Kept
- **UI**
- The "New flags in production" and "Flags archived vs flags created"
widgets
are now always shown for Enterprise instances on the Performance
Insights page.
### 📝 Why
The `lifecycleGraphs` feature flag has been fully rolled out and is now
considered a permanent part of the application. This cleanup removes the
obsolete flag and its related conditional logic to simplify the
codebase.

---------

Co-authored-by: unleash-bot <194219037+unleash-bot[bot]@users.noreply.github.com>
Co-authored-by: Thomas Heartman <thomas@getunleash.io>

frontend/src/component/insights/sections/PerformanceInsights.tsx

@@ -23,7 +23,6 @@ import {
     StyledWidgetContent,
     StyledWidgetStats,
 } from '../InsightsCharts.styles';
-import { useUiFlag } from 'hooks/useUiFlag';
 import { NewProductionFlagsChart } from '../componentsChart/NewProductionFlagsChart/NewProductionFlagsChart.tsx';
 import { CreationArchiveChart } from '../componentsChart/CreationArchiveChart/CreationArchiveChart.tsx';
 import { CreationArchiveStats } from '../componentsStat/CreationArchiveStats/CreationArchiveStats.tsx';
@@ -100,8 +99,6 @@ export const PerformanceInsights: FC = () => {
     const lastFlagTrend = flagTrends[flagTrends.length - 1];
     const flagsTotal = lastFlagTrend?.total ?? 0;
 
-    const isLifecycleGraphsEnabled = useUiFlag('lifecycleGraphs');
-
     return (
         <InsightsSection
             title='Performance insights'
@@ -113,7 +110,7 @@ export const PerformanceInsights: FC = () => {
                 />
             }
         >
-            {isLifecycleGraphsEnabled && isEnterprise() ? (
+            {isEnterprise() ? (
                 <NewProductionFlagsWidget
                     groupedLifecycleData={groupedLifecycleData}
                     loading={loading}
@@ -122,7 +119,7 @@ export const PerformanceInsights: FC = () => {
                 />
             ) : null}
 
-            {isLifecycleGraphsEnabled && isEnterprise() ? (
+            {isEnterprise() ? (
                 <StyledWidget>
                     <StyledWidgetStats width={275}>
                         <WidgetTitle title='Flags archived vs flags created' />

frontend/src/hooks/api/getters/useInsights/useInsights.ts

@@ -18,7 +18,13 @@ type InstanceInsightsWithLabels = InstanceInsightsSchema & {
     labels: { date: string; week: string }[];
 };
 
-// todo (lifecycleGraphs): consider moving this to the API instead.
+// note: these could be generated on the API instead and returned as part of the
+// payload. However, that would require updating the API response, and would
+// make it harder to change if we need to. For the time being (Nov 7, 2025),
+// I'll leave them here.
+//
+// If you're working on something relating to this feature later, please
+// consider moving this to the API instead.
 const generateWeekLabels = (
     start: string,
     end: string,

frontend/src/interfaces/uiConfig.ts

@@ -86,7 +86,6 @@ export type UiFlags = {
     customMetrics?: boolean;
     impactMetrics?: boolean;
     plausibleMetrics?: boolean;
-    lifecycleGraphs?: boolean;
     globalChangeRequestList?: boolean;
     trafficBillingDisplay?: boolean;
     milestoneProgression?: boolean;

src/lib/types/experimental.ts

@@ -53,7 +53,6 @@ export type IFlagKey =
     | 'edgeObservability'
     | 'customMetrics'
     | 'impactMetrics'
-    | 'lifecycleGraphs'
     | 'etagByEnv'
     | 'fetchMode'
     | 'optimizeLifecycle'
@@ -241,10 +240,6 @@ const flags: IFlags = {
         process.env.UNLEASH_EXPERIMENTAL_IMPACT_METRICS,
         false,
     ),
-    lifecycleGraphs: parseEnvVarBoolean(
-        process.env.UNLEASH_EXPERIMENTAL_LIFECYCLE_GRAPHS,
-        false,
-    ),
     streaming: {
         name: 'disabled',
         enabled: parseEnvVarBoolean(

src/server-dev.ts

@@ -51,7 +51,6 @@ process.nextTick(async () => {
                         strictSchemaValidation: true,
                         customMetrics: true,
                         impactMetrics: true,
-                        lifecycleGraphs: true,
                         globalChangeRequestList: true,
                         trafficBillingDisplay: true,
                         milestoneProgression: true,