feat(mgc): rendezvous planner — same-time landing across all modes

Routes every dispatch through a tick-aware planner so all pumps reach
their setpoint at the same wall-clock instant t* = max(eta_i),
regardless of control strategy or per-pump reaction speed.

Architecture (src/movement/):
- machineProfile.js   – pure snapshot of a registered child (state,
                        position, velocityPctPerS, ladder timings,
                        flowAt / positionForFlow). Reads timings from
                        child.state.config.time (the actual storage
                        location — previous fallback paths silently
                        produced 0 s, collapsing every eta to ramp-only).
- moveTrajectory.js   – seconds-to-target per machine; handles
                        idle / starting / warmingup / operational / cooling.
- movementScheduler.js – t* = max eta over ALL non-noop moves. Every
                        command is delayed so its move finishes at t*.
                        Startup execsequence fires at 0; its flowmovement
                        is gated by max(ladderS, t* − rampS) so a fast
                        pump waits before ramping rather than landing
                        early. useRendezvous=false collapses to all
                        fireAtTickN=0 (legacy fire-and-forget).
- movementExecutor.js – wall-clock virtual cursor: each tick fires
                        every command whose fireAtTickN ≤ floor(elapsed/tickS).
                        tick() no longer awaits pending fireCommand
                        promises — the synchronous prologue of
                        handleInput claims the latest-wins gate, which
                        is what race-favouring relies on.

Shared dispatch path (src/specificClass.js):
- _dispatchFlowDistribution(distribution) — extracted from
  _optimalControl. Builds profiles, calls movementScheduler.plan,
  replans the executor, ticks once. Reads
  config.planner.useRendezvous (default true).
- _optimalControl computes its bestCombination and hands off.
- equalFlowControl (priorityControl mode) computes its
  flowDistribution and hands off via ctx.mgc._dispatchFlowDistribution.
  Same-time landing now applies in BOTH modes.

Editor toggle (mgc.html + src/nodeClass.js):
- New "Same-time landing" checkbox under Control Strategy.
- nodeClass.buildDomainConfig bridges uiConfig.useRendezvous →
  config.planner.useRendezvous. Default ON.

Tests:
- New: planner-convergence.integration.test.js (real-time end-to-end
  diagnostic — drives a 3-pump mixed-state dispatch and asserts both
  convergence to the demand setpoint AND same-time landing within
  one tick).
- New: planner-rendezvous.integration.test.js (schedule-shape
  assertions against real pump objects).
- New: movementScheduler.basic.test.js — includes a mixed-speed
  multi-startup case proving the fast pumps wait so all three land
  together (the regression that prompted this work).
- New: movementExecutor.basic.test.js + moveTrajectory.basic.test.js.
- Updated executor contract test: tick() must NOT await pending fires.

Commands + wiki:
- handlers.js: source/mode allow-list gate moved into a shared _gate()
  helper; every command now checks isValidActionForMode +
  isValidSourceForMode before dispatching. Status-level commands
  (set.mode, set.scaling) are allowed in every mode.
- commands.basic.test.js: coverage for the new gate behaviour.
- wiki regen: Home.md visual-first rewrite + Reference-{Architecture,
  Contracts,Examples,Limitations}.md split with _Sidebar.md index.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/control/strategies.js

@@ -162,18 +162,15 @@ async function equalFlowControl(ctx, Qd, _powerCap = Infinity, priorityList = nu
         }
         mgc.measurements.type('Ncog').variant('predicted').position(POSITIONS.AT_EQUIPMENT).value(totalCog);
 
-        await Promise.all(flowDistribution.map(async ({ machineId, flow }) => {
-            const machine = mgc.machines[machineId];
-            const currentState = machine.state.getCurrentState();
-            if (flow > 0) {
-                await machine.handleInput('parent', 'flowmovement', mgc._canonicalToOutputFlow(flow));
-                if (currentState === 'idle') {
-                    await machine.handleInput('parent', 'execsequence', 'startup');
-                }
-            } else if (currentState === 'operational' || currentState === 'accelerating' || currentState === 'decelerating') {
-                await machine.handleInput('parent', 'execsequence', 'shutdown');
-            }
-        }));
+        // Route the chosen distribution through the shared planner/executor
+        // path. With planner.useRendezvous=true (the default) all pumps
+        // reach their per-pump flow target at the same wall-clock instant;
+        // with it false, every command fires at tick 0 — same effect as
+        // the legacy Promise.all dispatch but with correct startup/shutdown
+        // ordering (the planner emits execsequence BEFORE flowmovement for
+        // idle pumps, where the legacy code emitted them in the opposite
+        // order and relied on the pump's delayedMove queue to recover).
+        await mgc._dispatchFlowDistribution(flowDistribution);
     } catch (err) {
         mgc.logger?.error?.(err);
     }