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.

2 files changed, 10 insertions, 1 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
diff --git a/idatui/domain.py b/idatui/domain.py
index 31cb82d..0d5d0aa 100644
--- a/idatui/domain.py
+++ b/idatui/domain.py
@@ -58,7 +58,14 @@ class Func:
 
     @classmethod
     def from_raw(cls, d: dict) -> "Func":
-        return cls(addr=_as_int(d["addr"]), name=d["name"], size=_as_int(d["size"]))
+        addr = _as_int(d["addr"])
+        name = d.get("name")
+        # An unnamed function (server returns null/empty) must still have a
+        # usable string name — synthesize IDA's sub_ADDR so every consumer
+        # (palette, sort, rename prefill) can treat name as a str.
+        if not name:
+            name = f"sub_{addr:X}"
+        return cls(addr=addr, name=name, size=_as_int(d.get("size", 0)))
 
 
 @dataclass(frozen=True)