chore(ui): unify keybinding hints in Wizard + SessionPicker

Bracket-style `[↑↓] navigate · [Enter] X · [Esc] Y` matches the Confirm
modals; Wizard and SessionPicker were the last surfaces using the older
free-form `↑/↓ move · enter X · esc Y` style. Doc-comment examples in
Select.tsx updated to match.

src/cli/ui/Select.tsx

@@ -30,7 +30,7 @@ export interface SingleSelectProps<V extends string> {
   onCancel?: () => void;
   /**
    * Optional footer rendered dim beneath the list, e.g.
-   * `"↑/↓ navigate · Enter select · Esc cancel"`. Makes keyboard
+   * `"[↑↓] navigate · [Enter] select · [Esc] cancel"`. Makes keyboard
    * affordances discoverable — otherwise new users hit `y`/`n` and
    * wonder why nothing happens.
    */
@@ -87,7 +87,7 @@ export interface MultiSelectProps<V extends string> {
   initialSelected?: V[];
   onSubmit: (values: V[]) => void;
   onCancel?: () => void;
-  /** Footer hint under the list — e.g. "space toggle · enter confirm". */
+  /** Footer hint under the list — e.g. "[Space] toggle · [Enter] confirm". */
   footer?: string;
 }
 

src/cli/ui/SessionPicker.tsx

@@ -48,7 +48,7 @@ export function SessionPicker({
         onSubmit={(v) => onChoose(v as SessionChoice)}
       />
       <Box marginTop={1}>
-        <Text dimColor>↑↓ to move · Enter to pick</Text>
+        <Text dimColor>[↑↓] navigate · [Enter] select</Text>
       </Box>
     </Box>
   );

src/cli/ui/Wizard.tsx

@@ -97,7 +97,7 @@ export function Wizard({ onComplete, onCancel, existingApiKey, initial }: Wizard
           }}
         />
         <Box marginTop={1}>
-          <Text dimColor>↑/↓ move · enter confirm · esc cancel</Text>
+          <Text dimColor>[↑↓] navigate · [Enter] confirm · [Esc] cancel</Text>
         </Box>
       </StepFrame>
     );
@@ -115,7 +115,7 @@ export function Wizard({ onComplete, onCancel, existingApiKey, initial }: Wizard
             const needsArgs = selected.some((name) => CATALOG_BY_NAME.get(name)?.userArgs);
             setStep(needsArgs ? "mcpArgs" : "review");
           }}
-          footer="↑/↓ move · space toggle · enter confirm · esc cancel · leave empty to skip"
+          footer="[↑↓] navigate  ·  [Space] toggle  ·  [Enter] confirm  ·  [Esc] cancel  ·  empty = skip"
         />
       </StepFrame>
     );
@@ -174,7 +174,7 @@ export function Wizard({ onComplete, onCancel, existingApiKey, initial }: Wizard
             </Box>
           ) : null}
           <Box marginTop={1}>
-            <Text dimColor>enter save · esc cancel</Text>
+            <Text dimColor>[Enter] save · [Esc] cancel</Text>
           </Box>
         </Box>
         <ReviewConfirm
@@ -213,7 +213,7 @@ export function Wizard({ onComplete, onCancel, existingApiKey, initial }: Wizard
         <Text>Run `reasonix` any time to start chatting — your settings are remembered.</Text>
       </Box>
       <Box marginTop={1}>
-        <Text dimColor>Press enter to exit.</Text>
+        <Text dimColor>[Enter] to exit</Text>
       </Box>
       <ExitOnEnter onExit={exit} />
     </Box>