feat: make session selector keybindings configurable (#948)

I lost my ability to select up and down in the session selector because
of some hardcoded keybindings again... So, I am adding these
configurable keybindings so I can `ctrl+p` to select up :-)

### Changes

Adds 4 new keybinding actions for the session picker (/resume):
- `toggleSessionPath` (ctrl+p) - toggle path display
- `toggleSessionSort` (ctrl+r) - toggle sort mode
- `deleteSession` (ctrl+d) - delete selected session
- `deleteSessionNoninvasive` (ctrl+backspace) - delete when query empty

Refactors session-selector to use `kb.matches()` instead of hardcoded key checks.

packages/coding-agent/README.md

@@ -435,6 +435,11 @@ All keyboard shortcuts can be customized via `~/.pi/agent/keybindings.json`. Eac
 | `selectDown` | `down` | Move selection down in lists |
 | `selectConfirm` | `enter` | Confirm selection |
 | `selectCancel` | `escape`, `ctrl+c` | Cancel selection |
+| `toggleSessionPath` | `ctrl+p` | Toggle path display in session picker |
+| `toggleSessionSort` | `ctrl+s` | Toggle sort mode in session picker |
+| `renameSession` | `ctrl+r` | Rename selected session |
+| `deleteSession` | `ctrl+d` | Delete selected session |
+| `deleteSessionNoninvasive` | `ctrl+backspace` | Delete session (when query empty) |
 
 **Example (Emacs-style):**
 

packages/coding-agent/src/modes/interactive/components/session-selector.ts

@@ -17,7 +17,7 @@ import {
 import type { SessionInfo, SessionListProgress } from "../../../core/session-manager.js";
 import { theme } from "../theme/theme.js";
 import { DynamicBorder } from "./dynamic-border.js";
-import { keyHint, rawKeyHint } from "./keybinding-hints.js";
+import { keyHint } from "./keybinding-hints.js";
 import { filterAndSortSessions, type SortMode } from "./session-selector-search.js";
 
 type SessionScope = "current" | "all";
@@ -153,12 +153,12 @@ class SessionSelectorHeader implements Component {
 			const sep = theme.fg("muted", " · ");
 			const hint1 = keyHint("tab", "scope") + sep + theme.fg("muted", 're:<pattern> regex · "phrase" exact');
 			const hint2Parts = [
-				rawKeyHint("ctrl+s", "sort"),
-				rawKeyHint("ctrl+d", "delete"),
-				rawKeyHint("ctrl+p", `path ${pathState}`),
+				keyHint("toggleSessionSort", "sort"),
+				keyHint("deleteSession", "delete"),
+				keyHint("toggleSessionPath", `path ${pathState}`),
 			];
 			if (this.showRenameHint) {
-				hint2Parts.push(rawKeyHint("ctrl+r", "rename"));
+				hint2Parts.push(keyHint("renameSession", "rename"));
 			}
 			const hint2 = hint2Parts.join(sep);
 			hintLine1 = truncateToWidth(hint1, width, "…");
@@ -383,20 +383,20 @@ class SessionList implements Component, Focusable {
 			return;
 		}
 
-		if (matchesKey(keyData, "ctrl+s")) {
+		if (kb.matches(keyData, "toggleSessionSort")) {
 			this.onToggleSort?.();
 			return;
 		}
 
 		// Ctrl+P: toggle path display
-		if (matchesKey(keyData, "ctrl+p")) {
+		if (kb.matches(keyData, "toggleSessionPath")) {
 			this.showPath = !this.showPath;
 			this.onTogglePath?.(this.showPath);
 			return;
 		}
 
 		// Ctrl+D: initiate delete confirmation (useful on terminals that don't distinguish Ctrl+Backspace from Backspace)
-		if (matchesKey(keyData, "ctrl+d")) {
+		if (kb.matches(keyData, "deleteSession")) {
 			this.startDeleteConfirmationForSelectedSession();
 			return;
 		}
@@ -412,7 +412,7 @@ class SessionList implements Component, Focusable {
 
 		// Ctrl+Backspace: non-invasive convenience alias for delete
 		// Only triggers deletion when the query is empty; otherwise it is forwarded to the input
-		if (matchesKey(keyData, "ctrl+backspace")) {
+		if (kb.matches(keyData, "deleteSessionNoninvasive")) {
 			if (this.searchInput.getValue().length > 0) {
 				this.searchInput.handleInput(keyData);
 				this.filterSessions(this.searchInput.getValue());

packages/tui/src/keybindings.ts

@@ -41,7 +41,13 @@ export type EditorAction =
 	// Undo
 	| "undo"
 	// Tool output
-	| "expandTools";
+	| "expandTools"
+	// Session
+	| "toggleSessionPath"
+	| "toggleSessionSort"
+	| "renameSession"
+	| "deleteSession"
+	| "deleteSessionNoninvasive";
 
 // Re-export KeyId from keys.ts
 export type { KeyId };
@@ -95,6 +101,12 @@ export const DEFAULT_EDITOR_KEYBINDINGS: Required<EditorKeybindingsConfig> = {
 	undo: "ctrl+-",
 	// Tool output
 	expandTools: "ctrl+o",
+	// Session
+	toggleSessionPath: "ctrl+p",
+	toggleSessionSort: "ctrl+s",
+	renameSession: "ctrl+r",
+	deleteSession: "ctrl+d",
+	deleteSessionNoninvasive: "ctrl+backspace",
 };
 
 /**