DR-042 Phase C (legibility, part 1): expedition objective HUD, Aether button, cold-start seed, Biomass sink, palette declutter

Scoping/design-gated (wf_7c5a555e-136). Fixes "the base reads as inert after Phase A":

- C7b objective readout: new replicated ExpeditionObjective{[GhostField] byte State, short Remaining} on the
  untagged CycleDirector ghost (cross-region safe). Sole writer ZoneEnemyDirectorSystem, written ABOVE its
  early-returns (snapshot-above-early-return) so the HUD never freezes stale. Play-verified it replicates
  server->client.
- C7a gate prompt + C7b HUD readout: HudSystem shows "GO TO THE EXPEDITION GATE" / "EXPEDITION IN PROGRESS - N
  remaining" / "CLEARED - return to claim", below the siege/overrun overrides.
- C6a Aether upgrade button: un-gated BuildSendSystem.UpgradeAbility (was #if UNITY_EDITOR); HudSystem adds a
  MenuUi.Button with live affordability tint (the only Aether sink was U-key only).
- C6c cold-start seed: CycleDirectorSpawnSystem seeds Tuning.StartingOre (50) into the ledger on a NEW game only
  (born-correct, pre-Playback), killing the silent turret-before-fabricator deadlock. Play-verified seededOre=50.
- C6b Biomass sink: Wall cost Ore->Biomass (the dead currency now has a home). Play-verified WallCostRes=Biomass.
- C6d palette declutter: hide dead Pylon/Harvester/Conveyor from the build palette + trimmed their dev hotkeys
  (catalog/prefabs stay baked, code-intact per DR-020).

389/389 EditMode + clean netcode Play smoke (ghost re-hash OK, no exceptions). SaveData stays v5.
C5 (walls block enemies) is the remaining Phase C item, sequenced separately.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/_Project/Scripts/Simulation/World/CycleComponents.cs

@@ -83,4 +83,29 @@ namespace ProjectM.Simulation
         /// <summary>1 once the current epoch's expedition wave has FULLY spawned and been cleared to zero live zone enemies; reset to 0 on the empty-&gt;occupied epoch bump. The reward fires only on a REAL clear.</summary>
         public byte ClearedThisEpoch;
     }
+
+    /// <summary>
+    /// DR-042 C7b — a SMALL replicated summary of the current expedition objective so the client HUD can show an
+    /// "enemies remaining / cleared — return to claim" readout. Rides the GLOBAL UNTAGGED CycleDirector ghost
+    /// (alongside <see cref="CycleState"/> / GoalProgress) so GhostRelevancy.SetIsIrrelevant never hides it
+    /// cross-region — a base teammate can't see the expedition's own (region-tagged, relevancy-hidden) enemy
+    /// ghosts. SOLE writer: ZoneEnemyDirectorSystem (server, plain group), written ABOVE its early-returns
+    /// (snapshot-above-early-return) so the readout never freezes stale. byte/short, never enum (writer is [BurstCompile]).
+    /// </summary>
+    public struct ExpeditionObjective : IComponentData
+    {
+        /// <summary>0 = Idle (no sortie active), 1 = Active (wave in progress), 2 = Cleared (return to claim).</summary>
+        [GhostField] public byte State;
+
+        /// <summary>Live zone enemies remaining (alive + not-yet-spawned) while Active; 0 when Idle/Cleared.</summary>
+        [GhostField] public short Remaining;
+    }
+
+    /// <summary>State constants for <see cref="ExpeditionObjective.State"/> (byte, not enum — Burst/serialization).</summary>
+    public static class ExpeditionObjectiveState
+    {
+        public const byte Idle = 0;
+        public const byte Active = 1;
+        public const byte Cleared = 2;
+    }
 }