Mech milestone: reconstruct NameFilter (helper 3/3) -- helpers phase complete

NameFilter is the Mech's mechNameFilter (@0x36c), a small fixed debounce record
the ctor initialises. Reconstructed from FUN_00435a7c: a 10-word (0x28) struct,
Initialize() sets [2]=1 / [8]=[9]=-1 / rest 0 exactly. Header-only. Field
semantics unresolved (only caller is Initialize; reader is the unbuilt HUD) --
names best-effort, but size + init values are binary-exact, which is all the
Mech layout + ctor need.

All 3 missing embedded helper classes now reconstructed + compile-verified under
BC4.52 (AlarmIndicator, SequenceController struct+Init, NameFilter). MECH-LAYOUT.md
step 1 marked done. Next: MechSubsystem base + the subsystem roster, then finalize
MECH.HPP (probe sizeof==0x854), then the ctor + segment-table walk.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

restoration/source410/BT/NAMEFILT.NOTES.md

@@ -0,0 +1,33 @@
+# NAMEFILT.HPP — reconstruction notes
+
+**Status: struct + Initialize RECONSTRUCTED (compile-verified). Helper 3/3 of the
+Mech embedded helpers ([[MECH-LAYOUT]] step 1) — helpers phase COMPLETE.**
+
+`NameFilter` — the Mech's `mechNameFilter` (@0x36c). A small fixed-size
+debounce/hysteresis record the Mech ctor initialises. Absent from the 4.10
+archive; BT411 mis-proxied it as a no-op running-average (`ReconFiltered`).
+
+## Evidence
+
+`Initialize()` decomp `FUN_00435a7c` (BT411 reference/decomp part_004.c) sets a
+10-word (0x28 byte) object: `[2]=1`, `[8]=[9]=0xffffffff` (invalid ids), all
+other words 0. No allocation — a fixed inline struct (NOT AverageOf, which owns a
+heap array). Reconstructed to reproduce those writes exactly.
+
+## Known vs unknown
+
+- **Known (from the binary):** the layout size (0x28) and the exact Initialize()
+  values.
+- **Unknown:** the field SEMANTICS. The only caller in the reconstructed mech
+  family is `Initialize()` (ctor); the reader is presumably the HUD subsystem
+  (not yet reconstructed). Member names (value0/1, count, sample0..4,
+  candidateID, confirmedID) are best-effort from the init pattern (count=1, two
+  −1 ids) and will be refined when the HUD reader is reconstructed. Semantics do
+  not affect the build — only the size + init values matter for the Mech layout
+  and ctor.
+
+## Placement
+
+1995 filename/location unknown (decomp-only). Filed as BT/NAMEFILT.HPP,
+header-only (Initialize inlined — functionally identical to the out-of-line
+binary; no new .cpp / lib member needed).