feat: private feeds, all input fields supersede keyboard nav

src/hooks/useInputFocusNav.ts

@@ -0,0 +1,65 @@
+/**
+ * useInputFocusNav — returns a `ref` callback for an `<input>` (or any
+ * focusable renderable) that holds the navigation store's `inputFocused`
+ * flag true while the renderable has focus.
+ *
+ * Why: the Shell keyboard router (see `components/Shell.tsx`) yields keys to
+ * whatever is focused only when `nav.inputFocused()` is true; otherwise it
+ * dispatches navigation keybinds (j/k/h/…). Forms rendered inside the
+ * depth-stack (e.g. the Settings "Add Source" RSS form) don't drive that
+ * flag, so typing into them *also* fired the navigation keybinds. Wiring the
+ * flag to each input's real focus/blur state fixes that.
+ *
+ * A module-level counter guards the blur→focus ordering gap that occurs when
+ * tabbing between two inputs in the same form (the old input blurs before the
+ * new one focuses) so the flag never flickers off mid-handoff.
+ */
+
+import { onCleanup } from "solid-js";
+import { RenderableEvents } from "@opentui/core";
+import { useNavigation } from "@/context/NavigationContext";
+
+// Inputs (managed by this hook) currently holding focus.
+let focusedCount = 0;
+
+export function useInputFocusNav() {
+	const nav = useNavigation();
+	let current: any | undefined;
+
+	const onFocused = () => {
+		focusedCount++;
+		nav.setInputFocused(true);
+	};
+	const onBlurred = () => {
+		focusedCount = Math.max(0, focusedCount - 1);
+		if (focusedCount === 0) nav.setInputFocused(false);
+	};
+
+	const detach = (el: any) => {
+		el.off(RenderableEvents.FOCUSED, onFocused);
+		el.off(RenderableEvents.BLURRED, onBlurred);
+		// Treat a focused element being torn down as a blur so the counter
+		// doesn't leak and leave inputFocused stuck on.
+		if (el.focused) onBlurred();
+	};
+
+	const ref = (el: any) => {
+		if (current && current !== el) detach(current);
+		current = el;
+		if (el) {
+			el.on(RenderableEvents.FOCUSED, onFocused);
+			el.on(RenderableEvents.BLURRED, onBlurred);
+			// If the renderable is already focused when attached, count it.
+			if (el.focused) onFocused();
+		}
+	};
+
+	onCleanup(() => {
+		if (current) {
+			detach(current);
+			current = undefined;
+		}
+	});
+
+	return ref;
+}