chore(lint): turn on the rules that would have caught the dead code (#7037)

Three rules were off, so nothing enforced them. Measured, fixed the sites, and
enabled them where the cost is bounded.

`noAccumulatingSpread` — 2 violations, both real O(n²) reducers, both now
`Object.fromEntries`. One duplicates a block's subBlocks on every block
duplication; the other rebuilds a Record from every workspace env var. Enabled
repo-wide.

`noUnusedVariables` / `noUnusedFunctionParameters` — 633 repo-wide, but only 6
under `packages/`. Fixed those 6 and enabled both at error for `packages/**` via
an override, which permanently covers 979 files. `apps/sim`'s remaining 627 are
left deliberately: that is a sweep of its own, and a rule enabled with 627
outstanding warnings teaches people to ignore it.

This is the class of rule whose absence let the dead code in #7019 accumulate —
eleven unread loggers, a whole unimported file, write-only locals — none of which
any gate could see.

Two of the six were in `workflow-renderer`, where the fix is narrower than it
looks. `isWorkflowRunning` is destructured-but-unread in both the block and
subflow views, and the app passes it from `workflow-block.tsx` and
`subflow-node.tsx`. Its TSDoc claimed it "holds every block's action swell open";
nothing reads it, so that behavior does not exist. Removing the prop breaks the
callers and implementing it is a UX decision — there is adjacent logic
deliberately not pinning the toolbar during a handoff. So only the unused binding
goes, and the TSDoc now says what is true.

Not enabled: `noDocumentCookie` (3 sites, and its fix is the CookieStore API,
which is a browser-support call) and `useExhaustiveDependencies` (384 errors).

apps/sim/app/workspace/[workspaceId]/settings/components/secrets/components/secrets-manager/secrets-manager.tsx

@@ -795,9 +795,9 @@ export function SecretsManager() {
       }
     }
 
-    const validVariables = envVars
-      .filter((v) => v.key && v.value)
-      .reduce<Record<string, string>>((acc, { key, value }) => ({ ...acc, [key]: value }), {})
+    const validVariables = Object.fromEntries(
+      envVars.filter((v) => v.key && v.value).map(({ key, value }) => [key, value])
+    )
 
     const before = initialWorkspaceVarsRef.current
     const after = mergedWorkspaceVars

apps/sim/stores/workflows/workflow/store.ts

@@ -580,15 +580,11 @@ export const useWorkflowStore = create<WorkflowStore>()(
         const activeWorkflowId = get().currentWorkflowId
         const mergedBlock = mergeSubblockState(get().blocks, activeWorkflowId || undefined, id)[id]
 
-        const newSubBlocks = Object.entries(mergedBlock.subBlocks).reduce(
-          (acc, [subId, subBlock]) => ({
-            ...acc,
-            [subId]: {
-              ...subBlock,
-              value: structuredClone(subBlock.value),
-            },
-          }),
-          {}
+        const newSubBlocks = Object.fromEntries(
+          Object.entries(mergedBlock.subBlocks).map(([subId, subBlock]) => [
+            subId,
+            { ...subBlock, value: structuredClone(subBlock.value) },
+          ])
         )
 
         // Remap condition/router IDs in the duplicated subBlocks

biome.json

@@ -134,12 +134,25 @@
         "noStaticOnlyClass": "off"
       },
       "performance": {
-        "noAccumulatingSpread": "off",
+        "noAccumulatingSpread": "error",
         "noDelete": "error",
         "noImgElement": "off"
       }
     }
   },
+  "overrides": [
+    {
+      "includes": ["packages/**"],
+      "linter": {
+        "rules": {
+          "correctness": {
+            "noUnusedFunctionParameters": "error",
+            "noUnusedVariables": "error"
+          }
+        }
+      }
+    }
+  ],
   "javascript": {
     "formatter": {
       "jsxQuoteStyle": "single",

packages/testing/src/mocks/socket.mock.ts

@@ -40,7 +40,7 @@ export function createMockSocket(): IMockSocket {
     disconnected: false,
 
     // Core methods
-    emit: vi.fn((event: string, ..._args: any[]) => {
+    emit: vi.fn((_event: string, ..._args: any[]) => {
       return socket
     }),
 

packages/ts-sdk/src/index.ts

@@ -471,7 +471,7 @@ export class SimStudioClient {
     try {
       const status = await this.getWorkflowStatus(workflowId)
       return status.isDeployed
-    } catch (error) {
+    } catch {
       return false
     }
   }

packages/workflow-persistence/src/subflow-helpers.ts

@@ -78,7 +78,7 @@ export function generateLoopBlocks(blocks: Record<string, BlockState>): Record<s
 
   Object.entries(blocks)
     .filter(([_, block]) => block.type === 'loop')
-    .forEach(([id, block]) => {
+    .forEach(([id]) => {
       const loop = convertLoopBlockToLoop(id, blocks)
       if (loop) {
         loops[id] = loop
@@ -95,7 +95,7 @@ export function generateParallelBlocks(
 
   Object.entries(blocks)
     .filter(([_, block]) => block.type === 'parallel')
-    .forEach(([id, block]) => {
+    .forEach(([id]) => {
       const parallel = convertParallelBlockToParallel(id, blocks)
       if (parallel) {
         parallels[id] = parallel

packages/workflow-renderer/src/subflow/subflow-node-view.tsx

@@ -65,7 +65,14 @@ export interface SubflowNodeViewProps {
   isFocused: boolean
   /** Whether execution controls are active for this subflow. */
   isRunning?: boolean
-  /** Whether the parent workflow is executing. Holds every subflow action swell open. */
+  /**
+   * Whether the parent workflow is executing.
+   *
+   * Accepted and currently unread: `subflow-node.tsx` supplies it and nothing
+   * below consults it, so the hold-open behavior this once claimed is not
+   * implemented. Kept in the interface because the caller passes it — wire it up
+   * or stop passing it, but do not read this as working today.
+   */
   isWorkflowRunning?: boolean
   /** Whether this subflow participates in the current execution handoff. */
   isExecutionHighlighted?: boolean
@@ -326,7 +333,6 @@ export function SubflowNodeView({
   isLocked,
   isFocused,
   isRunning = false,
-  isWorkflowRunning = false,
   isExecutionHighlighted = false,
   diffStatus,
   nestingLevel,

packages/workflow-renderer/src/workflow-block/workflow-block-view.tsx

@@ -393,7 +393,14 @@ export interface WorkflowBlockViewProps {
   runPathStatus?: BlockRunStatus
   /** Whether execution controls are active for this block. */
   isRunning?: boolean
-  /** Whether the parent workflow is executing. Holds every block's action swell open. */
+  /**
+   * Whether the parent workflow is executing.
+   *
+   * Accepted and currently unread: `workflow-block.tsx` supplies it and nothing
+   * below consults it, so the hold-open behavior this once claimed is not
+   * implemented. Kept in the interface because the caller passes it — wire it up
+   * or stop passing it, but do not read this as working today.
+   */
   isWorkflowRunning?: boolean
   /** Whether this block participates in the current execution handoff. */
   isExecutionHighlighted?: boolean
@@ -521,7 +528,6 @@ export function WorkflowBlockView({
   ringStyles,
   runPathStatus,
   isRunning = false,
-  isWorkflowRunning = false,
   isExecutionHighlighted = false,
   Icon,
   iconBgColor,