refactor(web): move task-create-dialog prop builders to sibling file

3a0c45a0 introduced buildDialogFormBodyProps + buildDialogFooterProps
to slim TaskCreateDialog under the function-line cap, but adding them
in-file pushed task-create-dialog.tsx to 612 raw lines. Local eslint
still passes (skipBlankLines + skipComments brings the effective count
under 600), but Claude's review flagged the raw-line growth as a
blocker — and the prop builders are pure projections from setup state
to plain JS objects, no JSX, so they belong outside the component
module anyway.

Move computeHasAllBranches and both builders to a new
task-create-dialog-prop-builders.ts. Export TaskCreateDialogProps and
useTaskCreateDialogSetup from dialog.tsx so the builders can derive
their parameter types via ReturnType<typeof useTaskCreateDialogSetup>.

task-create-dialog.tsx: 612 → 522 raw lines.

apps/web/components/task-create-dialog-prop-builders.ts

@@ -0,0 +1,102 @@
+/**
+ * Pure prop-assembly helpers for the task-create dialog. Extracted from
+ * task-create-dialog.tsx so the orchestrator stays under the per-file line
+ * cap — these are non-React, no-JSX projections from the setup hook's
+ * result + dialog props, so they belong outside the component module.
+ */
+import {
+  TaskCreateDialogProps,
+  useTaskCreateDialogSetup,
+} from "@/components/task-create-dialog";
+import type { DialogFormBodyProps, DialogFormState } from "@/components/task-create-dialog-types";
+
+export function computeHasAllBranches(fs: DialogFormState): boolean {
+  if (fs.noRepository) return true;
+  if (fs.useGitHubUrl) return !!fs.githubBranch;
+  return fs.repositories.length > 0 && fs.repositories.every((r) => !!r.branch);
+}
+
+export function buildDialogFormBodyProps(
+  setup: ReturnType<typeof useTaskCreateDialogSetup>,
+  props: TaskCreateDialogProps,
+): DialogFormBodyProps {
+  const { fs, computed, handlers } = setup;
+  const repoLocked = !!props.lockedFields?.repository;
+  return {
+    isSessionMode: setup.isSessionMode,
+    isCreateMode: setup.isCreateMode,
+    isEditMode: setup.isEditMode,
+    isTaskStarted: setup.isTaskStarted,
+    onTaskNameChange: handlers.handleTaskNameChange,
+    onRowRepositoryChange: handlers.handleRowRepositoryChange,
+    onRowBranchChange: handlers.handleRowBranchChange,
+    isPassthroughProfile: computed.isPassthroughProfile,
+    initialDescription: fs.currentDefaults.description,
+    hasDescription: fs.hasDescription,
+    workspaceId: props.workspaceId,
+    onJiraImport: setup.handleJiraImport,
+    onLinearImport: setup.handleLinearImport,
+    agentProfileOptions: computed.agentProfileOptions,
+    executorProfileOptions: computed.executorProfileOptions,
+    agentProfiles: setup.agentProfiles,
+    agentProfilesLoading: computed.agentProfilesLoading,
+    executorsLoading: computed.executorsLoading,
+    isCreatingSession: fs.isCreatingSession,
+    workflows: setup.workflows,
+    snapshots: setup.snapshots,
+    effectiveWorkflowId: computed.effectiveWorkflowId ?? null,
+    fs,
+    handleKeyDown: setup.handleKeyDown,
+    onAgentProfileChange: handlers.handleAgentProfileChange,
+    onExecutorProfileChange: handlers.handleExecutorProfileChange,
+    onWorkflowChange: handlers.handleWorkflowChange,
+    onToggleGitHubUrl: repoLocked ? undefined : handlers.handleToggleGitHubUrl,
+    onGitHubUrlChange: handlers.handleGitHubUrlChange,
+    onToggleFreshBranch: handlers.handleToggleFreshBranch,
+    onToggleNoRepository: repoLocked ? undefined : handlers.handleToggleNoRepository,
+    onWorkspacePathChange: handlers.handleWorkspacePathChange,
+    enhance: setup.enhance,
+    workflowAgentLocked: computed.workflowAgentLocked,
+    repositories: setup.repositories,
+    freshBranchAvailable: setup.freshBranchAvailable,
+    isLocalExecutor: computed.isLocalExecutor,
+    noCompatibleAgent: computed.noCompatibleAgent,
+    executorProfileName: computed.selectedExecutorProfileName,
+    extraFormSlot: props.extraFormSlot,
+    aboveDescriptionSlot: props.aboveDescriptionSlot,
+    bottomSlot: props.bottomSlot,
+    descriptionPlaceholder: props.descriptionPlaceholder,
+    workflowLocked: props.lockedFields?.workflow,
+  };
+}
+
+export function buildDialogFooterProps(
+  setup: ReturnType<typeof useTaskCreateDialogSetup>,
+  props: TaskCreateDialogProps,
+) {
+  const { fs, computed, submitHandlers } = setup;
+  return {
+    isSessionMode: setup.isSessionMode,
+    isCreateMode: setup.isCreateMode,
+    isEditMode: setup.isEditMode,
+    isTaskStarted: setup.isTaskStarted,
+    isPassthroughProfile: computed.isPassthroughProfile,
+    isCreatingSession: fs.isCreatingSession,
+    isCreatingTask: fs.isCreatingTask,
+    hasTitle: fs.hasTitle,
+    hasDescription: fs.hasDescription,
+    hasRepositorySelection: computed.hasRepositorySelection,
+    hasAllBranches: computeHasAllBranches(fs),
+    agentProfileId: computed.effectiveAgentProfileId,
+    workspaceId: props.workspaceId,
+    effectiveWorkflowId: computed.effectiveWorkflowId ?? null,
+    executorHint: computed.executorHint,
+    noCompatibleAgent: computed.noCompatibleAgent,
+    executorProfileName: computed.selectedExecutorProfileName,
+    onCancel: submitHandlers.handleCancel,
+    onUpdateWithoutAgent: submitHandlers.handleUpdateWithoutAgent,
+    onCreateWithoutAgent: submitHandlers.handleCreateWithoutAgent,
+    onCreateWithPlanMode: submitHandlers.handleCreateWithPlanMode,
+    submitBlockedReason: props.submitBlockedReason,
+  };
+}

apps/web/components/task-create-dialog.tsx

@@ -38,8 +38,12 @@ import {
   type TaskCreateDialogInitialValues,
 } from "@/components/task-create-dialog-state";
 import type { DialogFormBodyProps } from "@/components/task-create-dialog-types";
+import {
+  buildDialogFooterProps,
+  buildDialogFormBodyProps,
+} from "@/components/task-create-dialog-prop-builders";
 
-interface TaskCreateDialogProps {
+export interface TaskCreateDialogProps {
   open: boolean;
   onOpenChange: (open: boolean) => void;
   mode?: "create" | "edit" | "session";
@@ -97,12 +101,6 @@ interface TaskCreateDialogProps {
   submitBlockedReason?: string | null;
 }
 
-function computeHasAllBranches(fs: DialogFormState): boolean {
-  if (fs.noRepository) return true;
-  if (fs.useGitHubUrl) return !!fs.githubBranch;
-  return fs.repositories.length > 0 && fs.repositories.every((r) => !!r.branch);
-}
-
 function CreateModeBody(props: DialogFormBodyProps) {
   const {
     isCreateMode,
@@ -378,7 +376,7 @@ function resolveSingleRowLocalPath(fs: DialogFormState, repositories: Repository
   return "";
 }
 
-function useTaskCreateDialogSetup(props: TaskCreateDialogProps) {
+export function useTaskCreateDialogSetup(props: TaskCreateDialogProps) {
   const { open, mode = "create", workspaceId, workflowId, defaultStepId } = props;
   const { editingTask, initialValues } = props;
   const isSessionMode = mode === "session";
@@ -475,94 +473,6 @@ function useGuardedSubmit(
   );
 }
 
-// Build the props object passed to DialogFormBody. Extracted from
-// TaskCreateDialog so the orchestrator stays under the 100-line cap; the
-// shape just spreads setup + dialog props 1:1 so there's no behaviour change.
-function buildDialogFormBodyProps(
-  setup: ReturnType<typeof useTaskCreateDialogSetup>,
-  props: TaskCreateDialogProps,
-): DialogFormBodyProps {
-  const { fs, computed, handlers } = setup;
-  const repoLocked = !!props.lockedFields?.repository;
-  return {
-    isSessionMode: setup.isSessionMode,
-    isCreateMode: setup.isCreateMode,
-    isEditMode: setup.isEditMode,
-    isTaskStarted: setup.isTaskStarted,
-    onTaskNameChange: handlers.handleTaskNameChange,
-    onRowRepositoryChange: handlers.handleRowRepositoryChange,
-    onRowBranchChange: handlers.handleRowBranchChange,
-    isPassthroughProfile: computed.isPassthroughProfile,
-    initialDescription: fs.currentDefaults.description,
-    hasDescription: fs.hasDescription,
-    workspaceId: props.workspaceId,
-    onJiraImport: setup.handleJiraImport,
-    onLinearImport: setup.handleLinearImport,
-    agentProfileOptions: computed.agentProfileOptions,
-    executorProfileOptions: computed.executorProfileOptions,
-    agentProfiles: setup.agentProfiles,
-    agentProfilesLoading: computed.agentProfilesLoading,
-    executorsLoading: computed.executorsLoading,
-    isCreatingSession: fs.isCreatingSession,
-    workflows: setup.workflows,
-    snapshots: setup.snapshots,
-    effectiveWorkflowId: computed.effectiveWorkflowId ?? null,
-    fs,
-    handleKeyDown: setup.handleKeyDown,
-    onAgentProfileChange: handlers.handleAgentProfileChange,
-    onExecutorProfileChange: handlers.handleExecutorProfileChange,
-    onWorkflowChange: handlers.handleWorkflowChange,
-    onToggleGitHubUrl: repoLocked ? undefined : handlers.handleToggleGitHubUrl,
-    onGitHubUrlChange: handlers.handleGitHubUrlChange,
-    onToggleFreshBranch: handlers.handleToggleFreshBranch,
-    onToggleNoRepository: repoLocked ? undefined : handlers.handleToggleNoRepository,
-    onWorkspacePathChange: handlers.handleWorkspacePathChange,
-    enhance: setup.enhance,
-    workflowAgentLocked: computed.workflowAgentLocked,
-    repositories: setup.repositories,
-    freshBranchAvailable: setup.freshBranchAvailable,
-    isLocalExecutor: computed.isLocalExecutor,
-    noCompatibleAgent: computed.noCompatibleAgent,
-    executorProfileName: computed.selectedExecutorProfileName,
-    extraFormSlot: props.extraFormSlot,
-    aboveDescriptionSlot: props.aboveDescriptionSlot,
-    bottomSlot: props.bottomSlot,
-    descriptionPlaceholder: props.descriptionPlaceholder,
-    workflowLocked: props.lockedFields?.workflow,
-  };
-}
-
-function buildDialogFooterProps(
-  setup: ReturnType<typeof useTaskCreateDialogSetup>,
-  props: TaskCreateDialogProps,
-) {
-  const { fs, computed, submitHandlers } = setup;
-  return {
-    isSessionMode: setup.isSessionMode,
-    isCreateMode: setup.isCreateMode,
-    isEditMode: setup.isEditMode,
-    isTaskStarted: setup.isTaskStarted,
-    isPassthroughProfile: computed.isPassthroughProfile,
-    isCreatingSession: fs.isCreatingSession,
-    isCreatingTask: fs.isCreatingTask,
-    hasTitle: fs.hasTitle,
-    hasDescription: fs.hasDescription,
-    hasRepositorySelection: computed.hasRepositorySelection,
-    hasAllBranches: computeHasAllBranches(fs),
-    agentProfileId: computed.effectiveAgentProfileId,
-    workspaceId: props.workspaceId,
-    effectiveWorkflowId: computed.effectiveWorkflowId ?? null,
-    executorHint: computed.executorHint,
-    noCompatibleAgent: computed.noCompatibleAgent,
-    executorProfileName: computed.selectedExecutorProfileName,
-    onCancel: submitHandlers.handleCancel,
-    onUpdateWithoutAgent: submitHandlers.handleUpdateWithoutAgent,
-    onCreateWithoutAgent: submitHandlers.handleCreateWithoutAgent,
-    onCreateWithPlanMode: submitHandlers.handleCreateWithPlanMode,
-    submitBlockedReason: props.submitBlockedReason,
-  };
-}
-
 export function TaskCreateDialog(props: TaskCreateDialogProps) {
   const setup = useTaskCreateDialogSetup(props);
   return (