Confirm before Reset, and rewrite the docs for the new UI

Reset is destructive in a way its name does not advertise:
rebuild_project_container deletes both project volumes, so it wipes the
claude login, anything installed in the container, and every saved
session transcript. It was a single unconfirmed click in the overflow
menu, while the comparably destructive Remove already confirmed. Adds
ConfirmResetModal, which names each loss and says explicitly that the
host-side mounted folders are untouched.

Docs: the user guides still described the pre-Project-Home UI. Sixteen
factually wrong statements corrected, including "expand the Config
panel" (six sites), the actions table (Reset and Remove are in an
overflow menu, Files is a tab), a progress modal that no longer exists,
a double-click-to-rename gesture ProjectRow never had, the Full
Permissions boolean, an incomplete reserved-env list, and the claim in
TECHNICAL.md that OAuth tokens survive a Reset. Both layout diagrams and
the project tree were rebuilt from the filesystem.

New sections cover permission modes with the exact CLI mapping, Project
Home, Sessions, capability tiles, Automation, shared authentication, the
Auth Bridge and its security posture, and keyboard shortcuts.

Known gap recorded rather than papered over: the Automation tab manages
existing scheduled tasks but cannot create them — no add command is
registered — so task creation remains `triple-c-scheduler add` in the
terminal.

87 frontend tests, 34 Rust tests, both builds clean.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

app/src/components/projects/home/ProjectHome.tsx

@@ -8,6 +8,7 @@ import { ProjectStatusIndicator } from "../../ui/StatusIndicator";
 import Button from "../../ui/Button";
 import OverflowMenu from "../../ui/OverflowMenu";
 import ConfirmRemoveModal from "../ConfirmRemoveModal";
+import ConfirmResetModal from "../ConfirmResetModal";
 import OverviewTab from "./OverviewTab";
 import SessionsTab from "./SessionsTab";
 import AutomationTab from "./AutomationTab";
@@ -39,6 +40,7 @@ export default function ProjectHome({ projectId, active }: Props) {
   const project = projects.find((p) => p.id === projectId);
   const [tab, setTab] = useState<ProjectHomeTabId>("overview");
   const [confirmRemove, setConfirmRemove] = useState(false);
+  const [confirmReset, setConfirmReset] = useState(false);
   const { runningSince, progress } = useAppState(
     useShallow((s) => ({
       runningSince: s.runningSince[projectId],
@@ -144,9 +146,10 @@ export default function ProjectHome({ projectId, active }: Props) {
                   disabled: actions.backingUp || !project.container_id,
                 },
                 {
-                  label: "Reset container",
-                  onSelect: actions.handleReset,
+                  label: "Reset container…",
+                  onSelect: () => setConfirmReset(true),
                   disabled: !isStopped || actions.busy,
+                  danger: true,
                 },
                 {
                   label: "Remove project…",
@@ -205,6 +208,16 @@ export default function ProjectHome({ projectId, active }: Props) {
         {tab === "files" && <FilesTab project={project} />}
       </div>
 
+      {confirmReset && (
+        <ConfirmResetModal
+          projectName={project.name}
+          onCancel={() => setConfirmReset(false)}
+          onConfirm={() => {
+            setConfirmReset(false);
+            actions.handleReset();
+          }}
+        />
+      )}
       {confirmRemove && (
         <ConfirmRemoveModal
           projectName={project.name}