Flatten the 9P control tree and move it out of fs.zig

The served tree loses the self/ level: /index /ctl /new /log /screen
/listeners /pane/<n>/... /os, with /src only in -Dembed-sources=true builds
(default off, on for esp32p4). ctl speaks the editor's own language with two
lowercase verbs, look TEXT and exec TEXT, plus acme's addr verbs; the new/
factory directory becomes one clone file; cons is gone (exec Msg); name and
sel are files; stats report real lengths, modes and mtimes; /log streams
pane new/del/rename/save events. The tree code lives in src/ninep/
(tree, pane, ctl, addr, pty, events, screen, sources); fs.zig keeps host
access, mounts, resolution and find/grep. Same engine and transports.
README (fs-help.txt) and docs rewritten; tests updated and extended.

Co-Authored-By: Claude Fable 5.1 <[email protected]>

1 files changed, 3 insertions, 3 deletions

diff --git a/test/v9fs_terminal.py b/test/v9fs_terminal.py
index cc273a40..b49246d1 100644
--- a/test/v9fs_terminal.py
+++ b/test/v9fs_terminal.py
@@ -74,7 +74,7 @@ sys.exit(1)
                 execute(client, control, 'Tty9p')
                 until(report_path.exists, 'Tty9p did not reach the sudo stand-in')
                 report = json.loads(report_path.read_text())
-                pane = f"/self/pane/{report['pane']}"
+                pane = f"/pane/{report['pane']}"
                 until(lambda: b'V9FS_AUTH_READY' in client.read(pane + '/body'), 'prompt not visible')
                 assert report['socket'] == str(address)
                 assert report['argv'][:2] == ['-E', '--'], report
@@ -85,7 +85,7 @@ sys.exit(1)
                 assert report['path'] == path
                 assert report['shell'] == str(Path(shell).resolve()), report
                 # The detached core remains responsive during authentication.
-                assert client.read('/self/pane/1/body') == b'initial\n'
+                assert client.read('/pane/1/body') == b'initial\n'
                 target = Path(report['mount'])
                 assert target.is_dir() and list(target.iterdir()) == []
                 if interrupted:
@@ -100,7 +100,7 @@ sys.exit(1)
                 client.write(pane + '/pty/data', b'printf "OUTER_READY:%s\\n" "$PARDES_PANE"\r')
                 expected = ('OUTER_READY:' + report['pane']).encode()
                 until(lambda: expected in client.read(pane + '/body'), 'original shell did not remain usable')
-                assert client.read('/self/pane/1/body') == b'initial\n'
+                assert client.read('/pane/1/body') == b'initial\n'
     print('Tty9p: shell-first startup, quoted paths, hidden password input, failure recovery and cleanup passed')