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Description:
system/ui/lib/text_measure.pyandsystem/ui/lib/wrap_text.pymemoize results in module-global dicts that are never evicted or size-capped:Many call sites pass per-frame-varying text, including raw float formatting. Each distinct string produces a new key, so these caches grow without bound over a long UI session — a slow memory leak that doesn't recover until the process restarts.
Fix:
bound each cache with an LRU. Keys and lookup semantics are unchanged; only eviction is added.
Verification:
Added
system/ui/lib/tests/test_text_caches.pysystem/ui/lib/tests -66 passed
system/ui/lib/tests system/ui/tests - 73 passed