docs: move Θ-W1-T1 and Θ-W1-T2 into COMPLETED with recorded deviations

docs/PLAN.md

@@ -140,144 +140,13 @@ collision is real and the serialization is the correct answer.
 
 ### Θ-W1 — Collapse and re-seam
 
-**Three tracks, in priority order.** This wave removes a whole subsystem, re-seams the
-two files everything downstream must edit, and lands the filter DSP as a standalone
-pure module — so that from W2 on, tracks fill bands and call modules rather than
-fighting over god-TUs.
-
-#### Θ-W1-T1 — `zone-retirement`
-
-**Goal.** Retire the zone mapping system: ReaSampler 9000 becomes one capture = one
-parameter set — and, in the space that deletion clears, land the two responsibility
-seams the rest of the phase depends on.
-
-**Consolidates item 16.** (Also discharges the superseded per-zone storage language in
-items 2, 9, 11, 12 before those items are built.)
-
-**Surface boundary — owns:**
-- `src/core/instrument/map/` — `sample_map` (zone payload → one parameter set),
-  `component_state_io` (zones-payload version bump + migration).
-- `src/core/instrument/engine/` — `zone_params.h`, `sampler_core.{h,cpp}` (the
-  responsibility seam).
-- `src/core/instrument/ui/` — `editor_geometry` (Zone-face layout removal + the band
-  seam), `keyboard_strip` (zone-highlight geometry removal).
-- `src/shell/instrument/` — all eight editor face-axis TUs, `editor_internal.h`,
-  `processor_state.cpp`, `reasampler_processor.{h,cpp}`.
-- `CMakeLists.txt` target list (shared, low-conflict).
-
-**Behavior.**
-- **One capture = one parameter set.** The instrument holds one loaded capture and one
-  set of playback parameters governing it. No zones, no per-zone divergence, no keymap
-  of captures. Every playback parameter edits in exactly one place; no gesture can
-  express per-zone divergence.
-- **The zone-mapping surface goes away** — the dedicated zone-editing face and its
-  authoring affordances (add/delete zone, the per-zone parameter panel, the Low/High/
-  Root zone legend). **The root note survives as a first-class parameter of the one
-  set** — only its zone-legend housing goes.
-- **The per-zone/per-instance storage distinction collapses.** There is nothing for
-  VOICE and MASTER to be exceptions to and no second surface to hold in parity.
-- **Migration: adopt the first zone's capture and parameters.** A saved multi-zone
-  instance lifts by adopting its first zone's capture and that zone's parameters; the
-  remaining zones drop from the instance. Dropping a zone touches no file and no bank
-  entry. The sounds-identical bar is **deliberately relaxed** for a genuinely
-  multi-zone instance — Daniel has no projects with zones in use, so it has no real
-  referents. Single-zone instances lift losslessly.
-- **The single-capture experience is unchanged** — a loaded capture still plays across
-  the keyboard repitched from its root, key-tracking still applies.
-- **No effect on the bank or the extension.** Captures, banks, capture/placement
-  separation, and the prune safety model are untouched.
-
-**Structural deliverables (this wave's real output for everything downstream).**
-- **The `sampler_core` responsibility seam.** With zone resolution gone, what remains
-  divides cleanly: note routing / allocation / stealing / mono stack / panic (per-note,
-  cold) versus the per-voice per-sample render (hot). Split along that seam. Envelope
-  evaluation comes out as a concrete, header-inline evaluator — **never** a virtual
-  `tick()` on the per-voice path (structural heuristic 3 names this blowout by name).
-  The exact seam is [propose]; the constraint is not.
-- **The Sample-face band seam.** Split `editor_paint_sample` / `editor_input_sample` /
-  the Sample-face half of `editor_geometry` into **three bands — chrome, waveform,
-  decks** — with one pure band-stack allocator owning the vertical inventory. Land the
-  band inventory the phase needs (chrome band, waveform band sized for two stacked
-  lanes, deck row) so W2's three tracks *fill* bands rather than re-allocate them. The
-  band allocator is a shared read-only surface from W2 on; no later track re-owns it
-  without saying so.
-- Both TUs are at the ~600 ceiling before this work; neither may exit it over.
-
-**Acceptance criteria.**
-- The editor exposes no zone-mapping surface anywhere: no zone view or button, no
-  add/delete-zone affordance, no per-zone parameter panel, no Low/High zone legend. The
-  root-note control survives.
-- Every playback parameter edits in exactly one place and governs the instrument as a
-  whole; no gesture can express per-zone divergence.
-- A single-capture instance saved before this change reopens sounding identical — same
-  keyboard response, same parameters, same root.
-- A multi-zone instance saved before this change reopens holding its first zone's
-  capture with that zone's parameters — no error, no file touched, no bank entry
-  disturbed.
-- The one parameter set round-trips save/reload intact.
-- Bank, capture, placement, and prune behavior are unchanged.
-- `sampler_core` and the Sample-face TUs are split by responsibility; every resulting TU
-  is under ~600 lines or carries an explicit hot-path justification. No virtual dispatch
-  is introduced on the per-voice per-sample path — verify by inspection of the split.
-
-**Open questions.**
-- **Does any key-range concept survive? [propose]** With zones gone, does the capture
-  respond across the entire keyboard (repitched from root), or does a user-settable
-  low/high playable range survive as a plain parameter of the one set? Lean, consistent
-  with the simplification motive: **no range concept — full-keyboard response** — with
-  a low/high pair re-addable later as ordinary parameters if missed. **Θ-W2-T3 consumes
-  this answer** for the piano strip's contents; answer it here.
-- **Which zone is "first"? [verify]** The instance's existing zone ordering. No
-  real-world stakes given the migration rationale.
-- **The two responsibility seams [propose]** — see Structural deliverables.
-
----
-
-#### Θ-W1-T2 — `capture-handoff-bugs`
-
-**Goal.** Fix the two extension-side defects that break getting a capture out of the
-bank and into a target — one intermittent, one deterministic.
-
-**Consolidates items 5, 6.**
-
-**Surface boundary — owns:**
-- `src/shell/actions/drag_out_win.{h,cpp}`, `src/shell/actions/instrument_drop_win.{h,cpp}`
-- `src/core/ui/drag_out`, `src/core/wire/instrument_drop`
-- `src/shell/panel/panel_drag.cpp`
-- `src/ingest.{h,cpp}` (physically at `src/` root — see rider below)
-
-Fully disjoint from the instrument; runs concurrently with T1 and T3 without contact.
-
-**Behavior.**
-- **Item 5 — drag-out sometimes lands without audio.** Extension side, not the VST.
-  Dragging a capture out of the pool or a named bank *sometimes* produces a drop that
-  does not contain the audio; retrying works. Both details are load-bearing: the failure
-  is intermittent and a retry succeeds. Expected: every completed drag-out delivers the
-  capture's audio at the drop target, first try, every time.
-- **Item 6 — drop onto FX container loads the instrument without the capture.**
-  Dropping a capture onto an FX *container* loads a ReaSampler 9000 instance but without
-  the capture; dropping the same capture onto the FX *button* works as expected. The
-  FX-button path is the reference; the container path must match it.
-
-**Acceptance criteria.**
-- **Item 5 (soak gate — the failure is intermittent, so a single pass is not a gate):**
-  across a sustained session of varied drag-outs — pool and bank sources, including the
-  first drag after other bank activity — every drop yields a playable file containing
-  the audio, with no retry ever needed.
-- **Item 6:** a capture dropped onto an FX container yields an instrument instance with
-  that capture loaded and immediately playable, indistinguishable (apart from where the
-  FX sits) from the FX-button drop. The FX-button path remains unregressed.
-- `instrument_drop`'s all-or-nothing contract holds on the container path too: any
-  failure rolls back via `TrackFX_Delete`, leaving no orphaned instance.
-
-**Open questions.** None carried from the source items (both are bug reports recorded
-without root-cause analysis, per the no-code-reads constraint they were written under).
-
-**Opportunistic rider (not required; propose at review).** `ingest.cpp` / `ingest.h`,
-`ext_keys.h`, and `resource.h` physically live at `src/` root rather than under
-`shell/actions/` — a documented structural wart Phase Q's reorg did not close. This
-track is the only one in the phase that opens `ingest`; re-homing it here is cheap and
-otherwise needs its own dispatch. Take it or explicitly decline it.
+**Θ-W1-T1 (`zone-retirement`) and Θ-W1-T2 (`capture-handoff-bugs`) have landed** — see
+`docs/COMPLETED.md`. Between them: the zone subsystem is retired and the wave's two
+responsibility seams (the `sampler_core` split, the Sample-face band split) are in place;
+the two extension-side capture-handoff defects are fixed. **One track remains:**
+Θ-W1-T3 (`filter-dsp-port`), which lands the filter DSP as a standalone pure module —
+so that from W2 on, tracks fill bands and call modules rather than fighting over
+god-TUs.
 
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