fix: add explicit import capa.loader in ida plugin form.py

capa.loader.compute_layout was called without capa.loader being explicitly
imported; it worked only via capa.main's transitive import. Adding the
explicit import prevents a future AttributeError if import order changes.

CHANGELOG.md

@@ -50,6 +50,7 @@
 - fix: correct wrong dict key in VMRay _compute_monitor_threads assertion (used thread_id instead of process_id) @williballenthin
 fix: replace assert with isinstance guard in get_callee for invalid MethodSpec tokens @williballenthin
 - fix: replace assert with isinstance guard in get_callee for invalid MethodSpec tokens @williballenthin
+- fix: add explicit import capa.loader in form.py to avoid fragile transitive import dependency @williballenthin (SURF-62)
 - fix: initialize f=None before try block in load_capa_function_results to prevent UnboundLocalError in except handler @williballenthin (SURF-61)
 - fix: fix unreachable elif for NOT CompoundStatement so NOT rules render children in IDA plugin tree view @williballenthin (SURF-60)
 - fix: use next(iter(addrs)) instead of addrs.pop() to avoid mutating the feature cache in parse_features_for_tree @williballenthin (SURF-59)

capa/ida/plugin/form.py

@@ -27,6 +27,7 @@ import ida_settings
 import capa.main
 import capa.rules
 import capa.engine
+import capa.loader
 import capa.version
 import capa.ida.helpers
 import capa.render.json