Restore the bank fold and usage publish to the resume path, guard setActive against repeats, and make the meter fold's bound literal

The resume also hands back to a full reload when the fold moves the loaded capture's decode source, so the refs table and the audio cannot skew.

docs/TODO.md

@@ -242,17 +242,19 @@ alpha and this entry is re-filed against the new value.
 
 ## The editor's drag state machine has no seam, and `reasampler_editor.h` is near the ceiling
 
-**Context (Γ-W3, meter re-review).** `reasampler_editor.h` stands at **563 lines** against the
-~600-line ceiling — 37 lines of margin — and it keeps growing because every new surface on the
+**Context (Γ-W3, meter re-review).** `reasampler_editor.h` stands at **564 lines** against the
+~600-line ceiling — 36 lines of margin — and it keeps growing because every new surface on the
 Sample face adds its transient state there. The obvious seam is the drag state machine: `drag_`
 plus the per-gesture anchors it is read against.
 
 **Why it was declined rather than taken.** `drag_` has **42 references across 13 shell TUs**
-(measured over `src/shell/instrument/*.cpp`; the declaration in the header is additional), and
-every input TU both writes it and branches on it. Extracting it is a real refactor of the
-editor's input half, not a header move — and doing it inside a wave whose subject is the MASTER
-deck would have put an unrelated high-blast-radius change in the same diff. Declining was right;
-leaving it unrecorded was not.
+(measured over `src/shell/instrument/*.cpp`; the declaration in the header is additional). Of
+the six input TUs, three write it and branch on it (`editor_input`, `_waveform`, `_curve`) and
+three only write it (`_chrome`, `_browse`, `_deck`) — which is what makes the anchor invariant
+observed rather than enforced. Extracting it is a real refactor of the editor's input half, not
+a header move — and doing it inside a wave whose subject is the MASTER deck would have put an
+unrelated high-blast-radius change in the same diff. Declining was right; leaving it unrecorded
+was not.
 
 **The shape a fix would take.** A `DragState` type owning the kind plus its anchor payload,
 with the input TUs mutating it through named transitions rather than assigning `drag_` and its