Adding the bones of the drafting system by removing the wall and siege towers from the base set and adding them temporarily as choices for the draft. Also adding Project_Context and Project_Roadmap documents to use with Claude

Assets/_Project/Scripts/Gameplay/Draft/DraftOption.cs

@@ -0,0 +1,59 @@
+// Assets/_Project/Scripts/Gameplay/Draft/DraftOption.cs
+using UnityEngine;
+
+namespace TD.Gameplay.Draft
+{
+    /// <summary>
+    /// Base class for one authored draft choice. The draft system offers a player a
+    /// weighted-random selection of these between waves; the player picks one and the
+    /// server applies its effect.
+    /// </summary>
+    /// <remarks>
+    /// <para><b>One asset per choice.</b> Concrete subclasses (e.g.
+    /// <see cref="NewTowerDraftOption"/>) carry the payload and implement
+    /// <see cref="ServerApply"/>. New choice types (systemic upgrade, builder ability,
+    /// relic quest, enemy debuff) are added as new subclasses — the draft spine
+    /// (<see cref="DraftService"/>, <see cref="PlayerDraft"/>, HUD) is type-agnostic.</para>
+    ///
+    /// <para><b>Identity.</b> Options live in <see cref="DraftPool"/> and are referenced
+    /// over the network by their pool index (<c>DraftOptionId</c>) — the same
+    /// stable-within-a-match index pattern used by the tower catalog.</para>
+    ///
+    /// <para><b>Server-only logic.</b> <see cref="IsValidFor"/> and
+    /// <see cref="ServerApply"/> run on the server and operate on the target player's
+    /// per-player components (deck, gold, etc.). The ScriptableObject holds no per-player
+    /// state, so a single asset is shared across all players and matches.</para>
+    /// </remarks>
+    public abstract class DraftOption : ScriptableObject
+    {
+        [Header("Presentation")]
+        [Tooltip("Name shown on the draft card.")]
+        public string DisplayName;
+
+        [Tooltip("Short description shown on the draft card.")]
+        [TextArea(2, 4)]
+        public string Description;
+
+        [Tooltip("Icon shown on the draft card. Optional for placeholder content.")]
+        public Sprite Icon;
+
+        [Header("Generation")]
+        [Tooltip("Relative draw weight. Higher = offered more often. Rarer rewards use " +
+                 "lower weights. Must be > 0.")]
+        [Min(0.0001f)]
+        public float Weight = 1f;
+
+        /// <summary>
+        /// Server-only: can this option validly be OFFERED to the given player right now?
+        /// Lets the generator skip options that would be a no-op (e.g. a tower the player
+        /// already owns). Default true; override when an option has prerequisites.
+        /// </summary>
+        public virtual bool IsValidFor(ulong clientId) => true;
+
+        /// <summary>
+        /// Server-only: apply this option's effect to the given player. Returns false if
+        /// it could not be applied (caller treats as a no-op and logs).
+        /// </summary>
+        public abstract bool ServerApply(ulong clientId);
+    }
+}