chore(lint): add perf category to oxlint and fix resulting warnings

- Enable `perf: warn` in `.oxlintrc.json` and add `builtin` env; disable `no-await-in-loop` and `react/no-array-index-key` globally
- Reorder plugins so `oxc` is first
- Add `.oxfmtrc.json` override to suppress trailing commas in JSON/JSONC files
- Replace spread-into-new-object patterns (`{ ...x, key: val }`) with `Object.assign(x, { key: val })` in discover, explore, integrations, search, credits, and image-cache to satisfy perf rules
- Memoize `ChartContext` and `ToggleGroupContext` provider values to avoid unnecessary re-renders

apps/server/src/orpc/procedures/discover.ts

@@ -50,11 +50,10 @@ export const discover = os.discover.use(authed).handler(async ({ input, context
   const titleMap = ensureBrowseTitlesExist(baseItems);
   const items = baseItems.map((item) => {
     const entry = titleMap.get(`${item.tmdbId}-${item.type}`);
-    return {
-      ...item,
+    return Object.assign(item, {
       id: entry?.id ?? "",
       posterThumbHash: entry?.posterThumbHash ?? null,
-    };
+    });
   });
 
   const titleIds = items.map((r) => r.id);

apps/server/src/orpc/procedures/explore.ts

@@ -64,11 +64,10 @@ export const trending = os.explore.trending.use(authed).handler(async ({ input,
 
   const items = baseItems.map((item) => {
     const entry = titleMap.get(`${item.tmdbId}-${item.type}`);
-    return {
-      ...item,
+    return Object.assign(item, {
       id: entry?.id ?? "",
       posterThumbHash: entry?.posterThumbHash ?? null,
-    };
+    });
   });
 
   const heroEntry = heroResult
@@ -125,11 +124,10 @@ export const popular = os.explore.popular.use(authed).handler(async ({ input, co
   const titleMap = ensureBrowseTitlesExist(baseItems);
   const items = baseItems.map((item) => {
     const entry = titleMap.get(`${item.tmdbId}-${item.type}`);
-    return {
-      ...item,
+    return Object.assign(item, {
       id: entry?.id ?? "",
       posterThumbHash: entry?.posterThumbHash ?? null,
-    };
+    });
   });
 
   const titleIds = items.map((r) => r.id);

apps/server/src/orpc/procedures/integrations.ts

@@ -55,8 +55,7 @@ export const list = os.integrations.list.use(authed).handler(({ context }) => {
 
   const result = userIntegrations.map((integration) => {
     const events = eventsByIntegration.get(integration.id) ?? [];
-    return {
-      ...serializeIntegration(integration),
+    return Object.assign(serializeIntegration(integration), {
       recentEvents: events.map((e) => ({
         id: e.id,
         eventType: e.eventType,
@@ -65,7 +64,7 @@ export const list = os.integrations.list.use(authed).handler(({ context }) => {
         status: e.status,
         receivedAt: e.receivedAt.toISOString(),
       })),
-    };
+    });
   });
 
   return { integrations: result };

apps/server/src/orpc/procedures/search.ts

@@ -53,10 +53,7 @@ export const search = os.search.use(authed).handler(async ({ input }) => {
       })),
     );
     return {
-      results: personItems.map((r) => ({
-        ...r,
-        id: personMap.get(r.tmdbId),
-      })),
+      results: personItems.map((r) => Object.assign(r, { id: personMap.get(r.tmdbId) })),
       page: personResults.page ?? input.page,
       totalPages: personResults.total_pages ?? 1,
       totalResults: personResults.total_results ?? 0,
@@ -140,9 +137,9 @@ export const search = os.search.use(authed).handler(async ({ input }) => {
   );
 
   const results = mapped.map((r) => {
-    if (r.type === "person") return { ...r, id: personMap.get(r.tmdbId) };
+    if (r.type === "person") return Object.assign(r, { id: personMap.get(r.tmdbId) });
     const entry = titleMap.get(`${r.tmdbId}-${r.type}`);
-    return { ...r, id: entry?.id };
+    return Object.assign(r, { id: entry?.id });
   });
 
   return {