fix: prod-bundle boot, cloud-existence leak, observation gating (final review)

- Wrap main.js body in async main() to eliminate top-level await deadlock in Rollup
- Add npc.lastPlan so clouds persist after hidden arrival/destruction until analytic envelope expires
- Add maxEnvelopeArrival() helper; rewrite playerClouds() to use lastPlan for envelope-gated clouds
- Block markSeen() while player is mid-lane (no observation from hyperspace)
- Pass obsSys=null to playerClouds when player is in a lane (don't exclude visible band from hyperspace)
- Galaxy map clicks now select-only (intel); jumps via Nav buttons / gate diamonds only
- Add preview script, favicon no-op, .playwright-mcp/ and *.png to .gitignore, update README controls text

src/render/galaxyView.js

@@ -5,7 +5,7 @@ import { playerSystem } from '../sim/player.js';
 import { otherEnd } from '../sim/galaxy.js';
 
 export class GalaxyView {
-  // onSelectSystem(systemId) -> UI intel panel; onJump(laneId) -> goTo lane
+  // onSelectSystem(systemId) -> UI intel panel
   constructor(renderer, world, { onSelectSystem, onJump }) {
     this.renderer = renderer;
     this.world = world;
@@ -56,13 +56,6 @@ export class GalaxyView {
   }
 
   handleSystemTap(systemId) {
-    const sim = this.world;
-    const cur = playerSystem(sim);
-    // Clicking a neighbor = jump intent; clicking anything = intel selection.
-    const lane = sim.galaxy.lanes.find(
-      (l) => (l.a === cur && l.b === systemId) || (l.b === cur && l.a === systemId)
-    );
-    if (lane) this.onJump(lane.id);
     this.onSelectSystem(systemId);
   }
 
@@ -77,11 +70,13 @@ export class GalaxyView {
     const sim = this.world;
     const v = this.v;
     const cur = playerSystem(sim);
+    // Mid-lane the player observes nothing; don't exclude any visible band.
+    const obsSys = sim.player.loc.kind === 'lane' ? null : cur;
 
     // Probability clouds: glowing strokes along lane segments, alpha ~ weight.
     const cg = this.cloudG;
     cg.clear();
-    for (const cloud of playerClouds(sim, cur)) {
+    for (const cloud of playerClouds(sim, obsSys)) {
       for (const seg of cloud.segs) {
         const lane = sim.galaxy.lanes[seg.laneId];
         const p0 = this.lanePoint(lane, seg.fromSys, seg.f0);