feat(tui): refine plugin context slots

packages/tui/src/routes/home.tsx

@@ -85,11 +85,10 @@ export function Home() {
             />
           </pluginRuntime.Slot>
         </box>
-        <PluginSlot name="home.bottom" />
         <box flexGrow={1} minHeight={0} />
       </box>
       <box width="100%" flexShrink={0}>
-        <PluginSlot name="home.footer" />
+        <PluginSlot name="home.footer" input={{}} mode="replace" />
       </box>
       <Show when={forms()[0]?.id} keyed>
         {(_) => {

packages/tui/src/routes/session/index.tsx

@@ -77,7 +77,6 @@ import { nextThinkingMode, reasoningSummary, type ThinkingMode } from "../../con
 import { getScrollAcceleration } from "../../util/scroll"
 import { collapseToolOutput } from "../../util/collapse-tool-output"
 import { usePluginRuntime } from "../../plugin/runtime"
-import { PluginSlot } from "../../plugin/context"
 import { Keymap, type KeymapCommand } from "../../context/keymap"
 import { usePathFormatter } from "../../context/path-format"
 import { useLocation } from "../../context/location"
@@ -915,7 +914,6 @@ export function Session() {
     >
       <box flexDirection="row" flexGrow={1} minHeight={0}>
         <box flexGrow={1} minHeight={0} paddingBottom={1} paddingLeft={2} paddingRight={2} gap={1}>
-          <PluginSlot name="session.header" input={{ sessionID: route.sessionID }} />
           <Show when={session()}>
             <scrollbox
               ref={(r) => (scroll = r)}
@@ -960,7 +958,6 @@ export function Session() {
               </Show>
             </scrollbox>
             <box flexShrink={0}>
-              <PluginSlot name="session.composer.top" input={{ sessionID: route.sessionID }} />
               <Composer
                 sessionID={route.sessionID}
                 open={composer.open || (!!session()?.parentID && forms().length === 0)}

packages/tui/src/routes/session/sidebar.tsx

@@ -53,12 +53,12 @@ export function Sidebar(props: { sessionID: string; overlay?: boolean }) {
                 </Show>
               </box>
             </pluginRuntime.Slot>
-            <PluginSlot name="sidebar.content" input={{ sessionID: props.sessionID }} />
+            <PluginSlot name="sidebar.content" input={{ sessionID: props.sessionID }} mode="all" />
           </box>
         </scrollbox>
 
         <box flexShrink={0} gap={1} paddingTop={1}>
-          <PluginSlot name="sidebar.footer" />
+          <PluginSlot name="sidebar.footer" input={{}} mode="replace" />
         </box>
       </box>
     </Show>