v3.26.0 — Windows fixes + custom context window + show_cwd (#29–#32)

Community issue sweep — all four open issues fixed (#29 #30 #31 #32).

Fixed

• Windows: cs doctor / cs --setup false-positive "not ours" (#32).
  shutil.which("cs") on Windows resolves to cs.EXE; the basename never
  exact-matched our command names, so setup refused to configure and doctor
  always flagged a foreign statusLine. Command basenames are now lowercased
  and stripped of the pip/pipx shim extensions (.exe/.cmd/.bat) before
  matching. Foreign tools ending in .exe are still refused.
• Windows: unbounded daemon process leak (#31). The old no-fcntl
  fallback always returned True ("honor system"), so every stale render tick
  spawned another daemon (~150 orphans/day reported). Three defenses now:
  a real msvcrt.locking exclusive lock on a separate daemon.lock
  sentinel (locking daemon.pid itself would blind stop/status —
  Windows byte locks are mandatory), a ctypes OpenProcess liveness probe
  (os.kill(pid, 0) on Windows terminates the target), and a 30s spawn
  debounce in the thin client so even a broken lock leaks at most one
  short-lived process per 30s. Not yet verified on real Windows — feedback
  welcome on #31.

Added

• CLAUDE_CODE_AUTO_COMPACT_WINDOW / CLAUDE_CODE_DISABLE_1M_CONTEXT
  respected for the ctx gauge (#29). Users who raise the context window
  (e.g. 400000) no longer see ctx% computed against the stock window;
  a truthy CLAUDE_CODE_DISABLE_1M_CONTEXT caps a >200K reported window
  back to 200K. Empty/invalid values keep current behavior.
• show_cwd toggle (#30). Opt-in working-directory segment (default
  off) rendered from stdin's workspace.current_dir — zero extra I/O.
  cwd_style chooses basename (default) or full; the segment is
  skipped when it would just repeat the project name.