fix: crash on an unnamed function (None name) in the symbol palette

`Ctrl+N` then typing crashed with `AttributeError: 'NoneType' object has no
attribute 'lower'` when a function had no name: Func.from_raw took `d["name"]`
verbatim, so a server-returned null/missing name became None and blew up
_fuzzy (and would break sort/rename-prefill too).

Two-layer fix:
  * Func.from_raw synthesizes IDA's `sub_<ADDR>` for a null/empty/missing name
    (and tolerates a missing size) so `name` is always a str for every
    consumer; and
  * _fuzzy guards against a falsy name defensively.

Verified: Func.from_raw({addr, name:null}) -> "sub_1000"; _fuzzy(None,'m') ->
None (no raise). Pilot palette + startup 9/0.

1 files changed, 2 insertions, 0 deletions

diff --git a/idatui/app.py b/idatui/app.py
index 7bca4e0..38d2411 100644
--- a/idatui/app.py
+++ b/idatui/app.py
@@ -1581,6 +1581,8 @@ def _fuzzy(name: str, q: str):
     matched character indices (for highlighting)."""
     if not q:
         return (0.0, ())
+    if not name:  # defensive: never assume a symbol has a name
+        return None
     nl = name.lower()
     pos: list[int] = []
     i = 0