feat(tasks): text input + Honcho persistence

Manual task input box in TaskList component.
Tasks persisted to Honcho as JSON preference on every mutation.
Tasks loaded from Honcho on identify (session reconnect).

frontend/src/components/TaskList.tsx

@@ -1,13 +1,23 @@
+import { useState } from 'react';
 import { Task } from '../hooks/useConversation';
 
 interface Props {
   tasks: Task[];
+  addTask: (text: string) => void;
 }
 
-export default function TaskList({ tasks }: Props) {
+export default function TaskList({ tasks, addTask }: Props) {
+  const [input, setInput] = useState('');
   const pending = tasks.filter((t) => !t.completed);
   const done = tasks.filter((t) => t.completed);
 
+  const handleSubmit = (e: React.FormEvent) => {
+    e.preventDefault();
+    if (!input.trim()) return;
+    addTask(input.trim());
+    setInput('');
+  };
+
   return (
     <div className="p-3">
       <h3 className="text-sm font-bold text-kira-plum mb-2 flex items-center gap-2">
@@ -19,9 +29,25 @@ export default function TaskList({ tasks }: Props) {
         )}
       </h3>
 
+      <form onSubmit={handleSubmit} className="flex gap-1.5 mb-2">
+        <input
+          type="text"
+          value={input}
+          onChange={(e) => setInput(e.target.value)}
+          placeholder="add a task..."
+          className="flex-1 bg-white/30 border border-kira-pink/20 rounded-lg px-2 py-1 text-xs text-kira-plum placeholder:text-kira-plum/30 focus:outline-none focus:border-kira-pink/50"
+        />
+        <button
+          type="submit"
+          className="bg-kira-pink/30 hover:bg-kira-pink/50 text-kira-plum text-xs px-2 py-1 rounded-lg transition-colors"
+        >
+          +
+        </button>
+      </form>
+
       {tasks.length === 0 && (
-        <div className="text-xs text-kira-plum/30 text-center py-4">
-          tell Kira what you need to do!
+        <div className="text-xs text-kira-plum/30 text-center py-2">
+          tell Kira or type a task above!
         </div>
       )}