Add worktrees, per-hunk review, effort per message, regenerate, voice input

- Isolated git worktree per session (create, status, merge, discard)
- Permission card: accept file-edit hunks individually; agent learns what was rejected
- Reasoning effort per message; regenerate the last answer with another model/effort
- Voice input via the Web Speech API
- Folder-up button in the file browser; ssh, rsync and mc in the image

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/components/ChatView.tsx

@@ -12,6 +12,8 @@ import { useReasoningMode } from "../prefs";
 import { Composer } from "./Composer";
 import { ShareDialog } from "./ShareDialog";
 import { RenameDialog } from "./RenameDialog";
+import { RegenerateButton } from "./Regenerate";
+import { WorktreeChip } from "./WorktreeChip";
 import { QueueList } from "./QueueList";
 import { BudgetChip } from "./Budget";
 import { PermissionCard, QuestionCard } from "./Interaction";
@@ -215,14 +217,14 @@ export function ChatView({ sessionId, onMenu }: { sessionId: string; onMenu: ()
     }
   };
 
-  const send = async (raw: string, images: ImageData[]) => {
+  const send = async (raw: string, images: ImageData[], effort?: string) => {
     const txt = raw.trim();
     if (txt === "/new") {
       setText("");
       return navigate("/new");
     }
     try {
-      await post(`/sessions/${sessionId}/prompt`, { text: txt, images });
+      await post(`/sessions/${sessionId}/prompt`, { text: txt, images, effort: effort || undefined });
       setText("");
       follow(true);
     } catch (e: any) {
@@ -230,6 +232,7 @@ export function ChatView({ sessionId, onMenu }: { sessionId: string; onMenu: ()
     }
   };
 
+  const lastAssistantIdx = messages.reduce((acc, m, i) => (m.role === "assistant" ? i : acc), -1);
   const [rewinding, setRewinding] = useState<Message>();
   const rewind = (m: Message) => setRewinding(m);
   const rewindDone = async () => {
@@ -296,6 +299,7 @@ export function ChatView({ sessionId, onMenu }: { sessionId: string; onMenu: ()
             {fmtCost(stats.total.cost, stats.currency)}
           </button>
         )}
+        <WorktreeChip session={session} busy={busy} />
         <ShellsChip sessionId={sessionId} busy={busy} />
         {isAdmin && <BudgetChip />}
         {session.permission_mode === "bypass" && <span className="chip warn">{t("permissionMode.bypass")}</span>}
@@ -323,16 +327,33 @@ export function ChatView({ sessionId, onMenu }: { sessionId: string; onMenu: ()
               </button>
             )}
             <details className="menu-pop">
-              <summary className="small ghost" title={t("chat.export")}>
-                <Icon name="download" />
+              <summary className="small ghost" title={t("chat.more")} aria-label={t("chat.more")}>
+                <Icon name="more" />
               </summary>
               <div className="menu-pop-body">
                 <a href={`/api/sessions/${sessionId}/export?format=md`} download>
-                  {t("chat.exportMd")}
+                  <Icon name="download" /> {t("chat.exportMd")}
                 </a>
                 <a href={`/api/sessions/${sessionId}/export?format=json`} download>
-                  {t("chat.exportJson")}
+                  <Icon name="download" /> {t("chat.exportJson")}
                 </a>
+                {!session.parent_id && !session.worktree && (
+                  <a
+                    href="#"
+                    onClick={async (e) => {
+                      e.preventDefault();
+                      (e.currentTarget.closest("details") as HTMLDetailsElement).open = false;
+                      try {
+                        await post(`/sessions/${sessionId}/worktree`, { action: "create" });
+                        toast(t("worktree.created"), "success");
+                      } catch (err: any) {
+                        toast(err.message);
+                      }
+                    }}
+                  >
+                    <Icon name="fork" /> {t("worktree.create")}
+                  </a>
+                )}
               </div>
             </details>
             <button className="small ghost" onClick={() => post(`/sessions/${sessionId}/compact`).catch((e) => toast(e.message))} disabled={busy} title={t("command.compact")}>
@@ -366,11 +387,13 @@ export function ChatView({ sessionId, onMenu }: { sessionId: string; onMenu: ()
         <div className="chat">
           {showStats && <UsageOverlay session={session} onClose={() => setShowStats(false)} />}
           {messages.length === 0 && !draft && <div className="empty">{t("chat.empty")}</div>}
-          {messages.map((m) => {
+          {messages.map((m, idx) => {
             if (m.role === "assistant") {
+              const lastAnswer = idx === lastAssistantIdx && !busy && !readOnly && !session.parent_id;
               return (
                 <div key={m.id} className="msg">
                   <AssistantParts parts={m.parts} results={results} running={busy} live={false} baseDir={session.cwd} />
+                  {lastAnswer && <RegenerateButton sessionId={sessionId} messageId={m.id} model={session.model} />}
                 </div>
               );
             }