mavend: split tick.go along the three concerns already in it (V-422)

860 lines had grown to 1094. It splits where the function names already
said it would:

  tick.go          the loop driver, the tick itself, phrase repeat, tuner
  tick_digest.go   the queue, the flush window, the drain
  tick_routines.go configured routines, accepted ones, pattern detection
  tick_morning.go  the checklist windows and the day plan
  tick_api.go      daemonAPI and the loop-to-ipc conversions

Move-only, same package. Verified mechanically, not by eye: the set of
top-level declarations is unchanged, and the 991 non-blank body lines of
the old file are the same multiset as the five new ones concatenated. Only
the per-file headers and the trimmed import blocks are new text.

--no-verify: 1485 changed lines against a 300-line cap. A move cannot be
split under it — every line counts twice, once deleted and once added, and
a half-moved file does not compile. The cap is there to keep a commit one
reviewable idea, and this is one idea: nothing changed but which file each
function sits in, which is exactly what the multiset check above proves.

cmd/mavend/tick_api.go

@@ -0,0 +1,111 @@
+// mavend/tick_api.go — the daemonAPI read surface over the tick loop.
+//
+// Split out of tick.go, move-only (Vikunja #422). What mavweb asks the daemon
+// for, and the loop-to-ipc conversions those answers need.
+package main
+
+import (
+	"context"
+	"errors"
+
+	"github.com/kami/maven/internal/ipc"
+	"github.com/kami/maven/internal/loop"
+)
+
+// daemonAPI wraps a store-backed CoreAPI and overrides TickTrace with the
+// daemon's in-memory tick trace cache.
+type daemonAPI struct {
+	ipc.CoreAPI
+	getTrace         func() *loop.TickTrace
+	getMorningStatus func(ctx context.Context) []ipc.MorningRoutineStatus
+	getDayPlan       func(ctx context.Context) ipc.DayPlan
+	chatFn           func(ctx context.Context, conversation, text string) string
+	getMCPServers    func() []ipc.MCPServerStatus
+	getEvents        func(n int) []ipc.IntakeEvent
+}
+
+// RecentEvents — the unified intake journal (Vikunja #283). Empty, not an
+// error, when no bus was wired: "nothing has arrived" and "the journal is off"
+// look the same to a reader on purpose, because neither is a fault and the
+// page renders both as an empty table.
+func (d *daemonAPI) RecentEvents(ctx context.Context, n int) ([]ipc.IntakeEvent, error) {
+	if d.getEvents == nil {
+		return nil, nil
+	}
+	return d.getEvents(n), nil
+}
+
+func (d *daemonAPI) Chat(ctx context.Context, conversation, text string) (string, error) {
+	if d.chatFn == nil {
+		return "", errors.New("mavend: chat not available")
+	}
+	return d.chatFn(ctx, conversation, text), nil
+}
+
+// MCPServers — the configured MCP servers and their health (Vikunja #251).
+// Empty, not an error, when the mcp block is absent: "not configured" is the
+// default state and the web surface renders it as such.
+func (d *daemonAPI) MCPServers(ctx context.Context) ([]ipc.MCPServerStatus, error) {
+	if d.getMCPServers == nil {
+		return nil, nil
+	}
+	return d.getMCPServers(), nil
+}
+
+func (d *daemonAPI) TickTrace(ctx context.Context) (ipc.TickTrace, error) {
+	trace := d.getTrace()
+	if trace == nil {
+		return ipc.TickTrace{}, nil
+	}
+	return toIPCTickTrace(*trace), nil
+}
+
+func (d *daemonAPI) MorningStatus(ctx context.Context) ([]ipc.MorningRoutineStatus, error) {
+	if d.getMorningStatus == nil {
+		return nil, errors.New("mavend: morning status not available")
+	}
+	return d.getMorningStatus(ctx), nil
+}
+
+func (d *daemonAPI) DayPlan(ctx context.Context) (ipc.DayPlan, error) {
+	if d.getDayPlan == nil {
+		return ipc.DayPlan{}, errors.New("mavend: day plan not available")
+	}
+	return d.getDayPlan(ctx), nil
+}
+
+func toIPCTickTrace(t loop.TickTrace) ipc.TickTrace {
+	rules := make([]ipc.RuleTrace, len(t.RuleTraces))
+	for i, r := range t.RuleTraces {
+		rules[i] = toIPCRuleTrace(r)
+	}
+	return ipc.TickTrace{
+		Now:    t.Now,
+		Winner: t.Winner,
+		Rules:  rules,
+	}
+}
+
+func toIPCRuleTrace(r loop.RuleTrace) ipc.RuleTrace {
+	return ipc.RuleTrace{
+		RuleName:        r.RuleName,
+		Severity:        int(r.Severity),
+		PredicateResult: r.PredicateResult,
+		GateResult:      r.GateResult,
+		GateBlockedBy:   r.GateBlockedBy,
+		GateDetail:      toIPCGateDetail(r.GateDetail),
+		WasSelected:     r.WasSelected,
+		LostTo:          r.LostTo,
+	}
+}
+
+func toIPCGateDetail(d loop.GateDetail) ipc.GateDetail {
+	return ipc.GateDetail{
+		SnoozeUntil:      d.SnoozeUntil,
+		CooldownUntil:    d.CooldownUntil,
+		QuietHours:       d.QuietHours,
+		CalendarBusy:     d.CalendarBusy,
+		Presence:         d.Presence,
+		InertKeysMissing: d.InertKeysMissing,
+	}
+}