mavend: group the recall fields into one wiring struct (V-433)

The review comment asked for basic DI. The answer is the idiom voice.go
already had for capabilities — a cohesive *Wiring struct — applied to a
group that is not a capability toggle, plus the decision written down so
it is a rule and not a habit.

recallWiring holds the embedder, the vector store, the personal boundary
and the two numbers that gate an answer. They sat in three places on
reactiveHandler, with the gate numbers a hundred lines from the store
they gate. Its zero value means no recall, so it is a value, not a
pointer like the optional-capability groups.

dataStore stays out of it. patterns.go, ecosystem_acts.go and confirm.go
use it, so it is not part of this cluster.

docs/handler-wiring.md records the choice, rejects a container or a
wire-style generator outright, defers narrow per-handler interfaces to
the package split that would justify them, and states the constraint the
task named: a wiring change does not ride a feature PR.

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

cmd/mavend/voice.go

@@ -55,7 +55,6 @@ import (
 	"github.com/kami/maven/internal/crawl"
 	"github.com/kami/maven/internal/dialogue"
 	"github.com/kami/maven/internal/ipc"
-	"github.com/kami/maven/internal/memory"
 	"github.com/kami/maven/internal/phraser"
 	"github.com/kami/maven/internal/router"
 	"github.com/kami/maven/internal/store"
@@ -72,14 +71,16 @@ import (
 // safe (the wired stt/tts/router/api all are); called from per-conn
 // goroutines on the voice.Server.
 type reactiveHandler struct {
-	stt      stt.Transcriber
-	tts      tts.Synthesizer
-	router   *router.Router
-	embedder router.Embedder // reused for note write/query (same model as the classifier)
-	// boundary — the embedded seed sets behind the personal boundary
-	// (personalboundary.go). Zero value is usable and loads on first query;
-	// with no embedder it never loads and the boundary uses personalMarkers.
-	boundary personalBoundary
+	stt    stt.Transcriber
+	tts    tts.Synthesizer
+	router *router.Router
+
+	// recall — the note-and-fact recall subsystem: the embedder, the vector
+	// store it writes into, the personal boundary, and the two numbers that
+	// gate an answer. Grouped rather than spread across the handler because a
+	// handler that recalls needs all five and a handler that does not needs
+	// none of them (Vikunja #433, docs/handler-wiring.md).
+	recall recallWiring
 	// api — the CoreAPI the handler reads and writes through. Wired with the
 	// bare store adapter and UPGRADED by main once the daemonAPI exists; see
 	// upgradeAPI.
@@ -123,18 +124,8 @@ type reactiveHandler struct {
 	weatherProvider weather.Provider
 	weatherLocation string // default location for weather queries
 
-	memStore  memory.Store
 	dataStore *store.Store // direct store access for event extraction + pattern detection
 
-	// queryMinScore — the note-recall confidence gate. Top cosine below this ⇒
-	// "I don't know" instead of a guess. Tuned for the ONNX embedder; a knob, not
-	// load-bearing math (same posture as the presence thresholds). Set by
-	// wireVoice from VoiceConfig; default 0.55.
-	queryMinScore float64
-	// queryMinMargin — the second half of that gate: how far the top hit must
-	// beat the runner-up. 0 ⇒ margin off.
-	queryMinMargin float64
-
 	// timeParser — used as a fallback for stage-0 reminder grammar matches
 	// (where the extractor didn't run). Shared with the router's extractor.
 	// The production dateparser will replace StubDateTimeParser here too.