launch: sweep a crashed worker's stale DB locks before starting the supervisor

A binary whose worker was hard-killed mid-analysis leaves unpacked .id0/.id1/
.id2/.nam/.til files (no .i64). The supervisor is seeded with the target and
opens it on startup, so a wedged DB there crash-loops the whole supervisor
("Failed to open initial binary: Remote end closed connection") and the launcher
reports "supervisor exited during startup" -- before the TUI's own open-time
recovery can ever run.

When the launcher is about to start a fresh supervisor (server is down, so
nothing can hold the DB), proactively sweep the target's stale unpacked lock
files first (never the packed .i64). Safe because no server == no live session.

Verified: after clearing bash's stale locks the supervisor starts and stays up
20/20 checks over 20s with no crash loop and a clean log.

1 files changed, 9 insertions, 0 deletions

diff --git a/idatui/launch.py b/idatui/launch.py
index b02bf05..1acd99a 100644
--- a/idatui/launch.py
+++ b/idatui/launch.py
@@ -196,6 +196,15 @@ def main(argv: list[str] | None = None) -> int:
 
     # 1) supervisor up (seed it with our target so its initial worker is useful)
     if not args.no_server:
+        # If we're about to start a fresh supervisor (it's down), nothing holds
+        # this binary's DB, so clear any stale unpacked lock files a crashed
+        # worker left behind. The supervisor is seeded with this target and opens
+        # it on startup; a wedged DB there crash-loops the whole supervisor
+        # before the TUI's own recovery can ever run.
+        if binary is not None and not _server_up(*_server_addr(args.url)):
+            swept = _sweep_locks(binary)
+            if swept:
+                _log(f"cleared {swept} stale lock file(s) from a crashed worker")
         if not _ensure_server(args.url, binary):
             return 1
     elif not _server_up(*_server_addr(args.url)):