feat(setup): ping agent before chat, detect stale service, auto-install Claude

Round-trip confirmation before first chat. After cli-agent wires up the
Terminal Agent, send `chat ping` through the CLI socket under a spinner
with 30s timeout (shared helper in setup/lib/agent-ping.ts, also used by
verify). Only after a real reply do we show "Your assistant is ready."
and enter the chat loop. Ping failures surface a targeted note
(socket_error vs no_reply) and skip the prompt — so users never type
into the void.

Checkout-mismatch detection. verify resolves the running service PID's
script path via `ps -p <pid> -o command=` and compares to projectRoot.
If the service is running from a sibling clone (common for developers
with multiple checkouts), SERVICE comes back as running_other_checkout
instead of running, AGENT_PING is skipped, and the failure note tells
the user exactly which bootout + bootstrap pair to run.

Native Claude Code install on demand. Only the subscription auth path
needs `claude`; the paste-token and paste-API-key paths don't. So
register-claude-token.sh now runs setup/install-claude.sh when `claude`
is missing (curl -fsSL https://claude.ai/install.sh | bash), then
prepends ~/.local/bin to PATH in-process so the rest of the script can
see the fresh binary.

Gutter-safe wrapping. wrapForGutter + dimWrap in lib/theme.ts hard-wrap
text to `process.stdout.columns - gutter` on word boundaries, measuring
visible length (ANSI-stripped). dimWrap applies the dim envelope per
line because clack resets styling at each line break when rendering
multi-line log content — a single outer dim() only colors the first
line. Applied to the long "why" notes before container + onecli, the
channel-skip info, the ping-failure note, and the checkout-mismatch
remediation.

Wordmark anchoring. printIntro always includes the NanoClaw wordmark in
the clack intro line, whether or not nanoclaw.sh already printed one in
bash. Worth ~1 line of redundancy so the brand stays visible at the top
of the clack session after bootstrap output scrolls out.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

setup/lib/theme.ts

@@ -37,3 +37,66 @@ export function brandChip(s: string): string {
   }
   return k.bgCyan(k.black(k.bold(s)));
 }
+
+/**
+ * Wrap text so it fits inside clack's gutter without the terminal's soft
+ * wrap breaking the `│ …` bar on long lines. Works on a single string with
+ * embedded `\n`s; each logical line is wrapped independently.
+ *
+ * The `gutter` argument is the total horizontal overhead clack adds for
+ * the component the text lives in (e.g. 4 for `p.log.*`'s `│  ` prefix;
+ * 6-ish for `p.note`'s box). Caller picks it; we just subtract from
+ * `process.stdout.columns` and hard-wrap at word boundaries.
+ */
+export function wrapForGutter(text: string, gutter: number): string {
+  const cols = process.stdout.columns ?? 80;
+  const width = Math.max(30, cols - gutter);
+  return text
+    .split('\n')
+    .map((line) => wrapLine(line, width))
+    .join('\n');
+}
+
+/**
+ * Wrap + dim together. Needed instead of `k.dim(wrapForGutter(...))`
+ * because clack resets styling at each line break when rendering
+ * multi-line log content — a single outer dim envelope only colors the
+ * first line. Applying dim per-line gives each wrapped row its own
+ * `\x1b[2m…\x1b[0m` envelope so the whole block reads as one block.
+ */
+export function dimWrap(text: string, gutter: number): string {
+  return wrapForGutter(text, gutter)
+    .split('\n')
+    .map((line) => k.dim(line))
+    .join('\n');
+}
+
+const ANSI_RE = /\x1b\[[0-9;]*m/g;
+
+function visibleLength(s: string): number {
+  return s.replace(ANSI_RE, '').length;
+}
+
+function wrapLine(line: string, width: number): string {
+  if (visibleLength(line) <= width) return line;
+  const words = line.split(' ');
+  const rows: string[] = [];
+  let cur = '';
+  let curLen = 0;
+  for (const word of words) {
+    const wLen = visibleLength(word);
+    if (curLen === 0) {
+      cur = word;
+      curLen = wLen;
+    } else if (curLen + 1 + wLen <= width) {
+      cur += ' ' + word;
+      curLen += 1 + wLen;
+    } else {
+      rows.push(cur);
+      cur = word;
+      curLen = wLen;
+    }
+  }
+  if (cur) rows.push(cur);
+  return rows.join('\n');
+}