chore(lint): declare contract callbacks property-style

unbound-method flags destructuring a method-style member (method
signatures are bivariant and exempt from the this-context check).
These contract members are all plain callbacks — declare them as
property-style function types so consumers can destructure them
without a false this-binding hazard. Type-level only.

packages/client/ui-conversation/src/client/contract/slots.ts

@@ -144,7 +144,7 @@ export interface ToolRowOwnerProps {
   /** Frozen call slice: the running call or the settled result node. */
   block: ToolCallBlock
   /** Open the details panel for this call (session-level facility, supplied by the view). */
-  openDetails(): void
+  openDetails: () => void
 }
 
 /**
@@ -175,21 +175,21 @@ export interface ConversationInjected {
    * Connect the selected Workspace and open its reusable/new blank session.
    * When a blank session is already current, carry its draft to the target.
    */
-  selectWorkspace(workspaceId: WorkspaceId): Promise<void>
+  selectWorkspace: (workspaceId: WorkspaceId) => Promise<void>
 }
 
 /** Business callbacks injected into the strict session content seat. */
 export interface ConversationSessionInjected {
   /** Views projected from the `conversation.view` slot ledger. */
   views: {
-    list(): readonly ViewTab[]
-    subscribe(fn: () => void): () => void
-    version(): number
+    list: () => readonly ViewTab[]
+    subscribe: (fn: () => void) => () => void
+    version: () => number
   }
   /** Bind the input machine's draft persistence mirror to the session store. */
-  bindDraftMirror(write: (text: string) => void): () => void
+  bindDraftMirror: (write: (text: string) => void) => () => void
   /** Select a real Session through the runtime navigation owner. */
-  open(sessionId: SessionId): void
+  open: (sessionId: SessionId) => void
 }
 
 /**
@@ -219,7 +219,7 @@ export interface ComposerBarInjected {
   /** The InputBar-exclusive keyboard/DOM command face (decision 20 private plane). */
   keyboard: ComposerKeyboard
   /** Cancel the in-flight turn. */
-  stop(): void
+  stop: () => void
 }
 
 /**
@@ -275,8 +275,8 @@ export type ConversationSessionSlotProps =
  */
 export interface ChatViewInjected {
   /** Selection write + details panel opening in one gesture (store action + layout orchestration). */
-  openDetails(target: SelectionTarget): void
-  loadOlder(): void
+  openDetails: (target: SelectionTarget) => void
+  loadOlder: () => void
 }
 
 /** Full chat-view component props: runtime share & the declared toolview hole's render share & store share & injected share. */
@@ -290,7 +290,7 @@ export type ChatViewSlotProps =
  */
 export interface DetailsInjected {
   /** Close the details panel (layout geometry stays with ctx.layout). */
-  closeDetails(): void
+  closeDetails: () => void
 }
 
 /** Full details-slot component props: selection arrives through the shared store, call material through useSession. */
@@ -300,6 +300,6 @@ export type DetailsSlotProps = PropsRuntime<'details'> & PropsStore<ChatStore> &
 export interface EmptyWorkspaceOwnerProps {
   open: boolean
   anchorRef?: RefObject<HTMLElement>
-  onPick(workspaceId: WorkspaceId): void
-  onClose(): void
+  onPick: (workspaceId: WorkspaceId) => void
+  onClose: () => void
 }

packages/client/ui-slash/src/client/slots.ts

@@ -34,5 +34,5 @@ export interface MenuViewInjected {
    * @param source - source (group) name.
    * @param index - candidate index within the group.
    */
-  onPick(source: string, index: number): void
+  onPick: (source: string, index: number) => void
 }

packages/client/ui-workspace/src/client/contract/slots.ts

@@ -59,9 +59,9 @@ export type WorkspaceBrowserProps =
  */
 export type WorkspacePickerInjected = {
   /** Explicitly create or adopt a real Workspace before targeting a Session. */
-  createWorkspace(input: { name: string } | { path: string }): Promise<WorkspaceView>
+  createWorkspace: (input: { name: string } | { path: string }) => Promise<WorkspaceView>
   /** Ask the local Host to open its native single-directory picker. */
-  pickDirectory(): Promise<string | null>
+  pickDirectory: () => Promise<string | null>
 }
 
 /**

packages/client/web/src/loader-status.ts

@@ -46,13 +46,13 @@ export type LoaderStatus = Record<string, LoaderEntryState>
 /** Minimal observable snapshot the kernel components consume (useSyncExternalStore shape). */
 export interface KernelSignal<T> {
   /** Current value (stable reference between changes). */
-  getSnapshot(): T
+  getSnapshot: () => T
   /**
    * Subscribe to changes.
    * @param fn - change listener.
    * @returns the unsubscribe disposer.
    */
-  subscribe(fn: () => void): () => void
+  subscribe: (fn: () => void) => () => void
 }
 
 /** Writable one-value signal (settled flag, boot failure report). */
@@ -61,7 +61,7 @@ export interface KernelValueSignal<T> extends KernelSignal<T> {
    * Publish a new value and notify subscribers.
    * @param next - the new value.
    */
-  set(next: T): void
+  set: (next: T) => void
 }
 
 /**
@@ -90,7 +90,7 @@ export interface LoaderStatusStore extends KernelSignal<LoaderStatus> {
    * @param id - entry name.
    * @param state - projected fiber state.
    */
-  set(id: string, state: LoaderEntryState): void
+  set: (id: string, state: LoaderEntryState) => void
 }
 
 /**