fix(unity): resolve all 32 C# compilation errors

- CardModel: add missing `id` field
- CardModel: `imageUrl` → `imageUri` (match JSON property name)
- DeckModel: `commanderName` → `commander` (match JSON property name)
- PreconDeck: `imageUrl` → `imageUri`
- Add missing `PreconListWrapper` model class
- Add `using UnityEngine.Networking` to CollectionController,
  DeckGeneratorController, PreconController
- Remove double StartCoroutine() wrapping on ApiClient calls
  (GetRaw/PatchRaw/Delete/PostRaw already return Coroutine)
  Affected: CollectionController, DeckBuilderController,
  DeckGeneratorController, ScannerController, CoachController

unity-client/Assets/Scripts/Animation/CardController.cs

@@ -94,8 +94,8 @@ namespace CommanderAILab.Animation
                 frontFaceImage.sprite = lowResPlaceholder;
 
             // Async load high-res from Scryfall
-            if (!string.IsNullOrEmpty(card.imageUrl))
+            if (!string.IsNullOrEmpty(card.imageUri))
-                ImageCache.Instance.GetSprite(card.imageUrl, sprite =>
+                ImageCache.Instance.GetSprite(card.imageUri, sprite =>
                 {
                     if (frontFaceImage != null) frontFaceImage.sprite = sprite;
                 });

unity-client/Assets/Scripts/Models/CardModel.cs

@@ -11,6 +11,7 @@ namespace CommanderAILab.Models
     [Serializable]
     public class CardModel
     {
+        [JsonProperty("id")] public string id;
         [JsonProperty("name")] public string name;
         [JsonProperty("oracle_id")] public string oracleId;
         [JsonProperty("scryfall_id")] public string scryfallId;

unity-client/Assets/Scripts/Models/PreconListWrapper.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using Newtonsoft.Json;
+
+namespace CommanderAILab.Models
+{
+    /// <summary>Wrapper for the precon list returned by /api/lab/precons.</summary>
+    [Serializable]
+    public class PreconListWrapper
+    {
+        [JsonProperty("precons")] public List<string> precons;
+    }
+}

unity-client/Assets/Scripts/UI/CoachController.cs

@@ -395,7 +395,7 @@ namespace CommanderAILab.UI
             };
             string body = JsonConvert.SerializeObject(payload);
 
-            StartCoroutine(ApiClient.Instance.PostRaw("/api/coach/chat", body,
+            ApiClient.Instance.PostRaw("/api/coach/chat", body,
                 json =>
                 {
                     _isWaiting = false;
@@ -416,7 +416,7 @@ namespace CommanderAILab.UI
                     sendButton.interactable = true;
                     typingIndicator.gameObject.SetActive(false);
                     ShowError($"Chat failed: {err}");
-                }));
+                });
         }
 
         private void AddUserBubble(string text)
@@ -532,14 +532,14 @@ namespace CommanderAILab.UI
                 preconCompareText.text = "Refreshing precon database...";
 
             string body = JsonConvert.SerializeObject(new { });
-            StartCoroutine(ApiClient.Instance.PostRaw("/api/lab/precons/refresh", body,
+            ApiClient.Instance.PostRaw("/api/lab/precons/refresh", body,
                 json =>
                 {
                     if (preconCompareText != null)
                         preconCompareText.text = "Precon database refreshed!";
                     LoadPrecons();
                 },
-                err => ShowError($"Precon refresh failed: {err}")));
+                err => ShowError($"Precon refresh failed: {err}"));
         }
 
         // ── Export to Simulator ───────────────────────────────────────

unity-client/Assets/Scripts/UI/CollectionController.cs

@@ -3,6 +3,7 @@ using System.Collections;
 using System.Collections.Generic;
 using System.Text;
 using UnityEngine;
+using UnityEngine.Networking;
 using UnityEngine.UI;
 using UnityEngine.SceneManagement;
 using TMPro;
@@ -184,9 +185,9 @@ namespace CommanderAILab.UI
       _sortField    = SortFieldFromDropdown(sortDropdown.value);
 
       string path = BuildQueryPath(page);
-      StartCoroutine(ApiClient.Instance.GetRaw(path,
+      ApiClient.Instance.GetRaw(path,
         json    => OnPageLoaded(json, page),
-        errMsg  => OnLoadError(errMsg)));
+        errMsg  => OnLoadError(errMsg));
     }
 
     private string BuildQueryPath(int page)
@@ -257,9 +258,9 @@ namespace CommanderAILab.UI
 
         // Async image load
         var img = tile.GetComponentInChildren<Image>();
-        if (img != null && !string.IsNullOrEmpty(card.imageUrl))
+        if (img != null && !string.IsNullOrEmpty(card.imageUri))
         {
-          ImageCache.Instance.GetSprite(card.imageUrl, sprite =>
+          ImageCache.Instance.GetSprite(card.imageUri, sprite =>
           {
             if (img != null) img.sprite = sprite;
           });
@@ -297,9 +298,9 @@ namespace CommanderAILab.UI
       detailQuantity.text  = $"Owned: {card.ownedQty}";
 
       // Load card art on front face
-      if (!string.IsNullOrEmpty(card.imageUrl))
+      if (!string.IsNullOrEmpty(card.imageUri))
       {
-        ImageCache.Instance.GetSprite(card.imageUrl, sprite =>
+        ImageCache.Instance.GetSprite(card.imageUri, sprite =>
         {
           if (detailCardFront != null) detailCardFront.sprite = sprite;
         });

unity-client/Assets/Scripts/UI/DeckBuilderController.cs

@@ -266,9 +266,9 @@ namespace CommanderAILab.UI
       if (!string.IsNullOrEmpty(color))
         path += $"&colors={UnityWebRequest.EscapeURL(color)}";
 
-      StartCoroutine(ApiClient.Instance.GetRaw(path,
+      ApiClient.Instance.GetRaw(path,
         json => PopulateCommanderResults(json),
-        err  => ShowError($"Commander search failed:\n{err}")));
+        err  => ShowError($"Commander search failed:\n{err}"));
     }
 
     private void PopulateCommanderResults(string json)
@@ -300,7 +300,7 @@ namespace CommanderAILab.UI
     {
       _commander = card;
       selectedCommanderText.text = $"Commander: {card.name}";
-      if (_activeDeck != null) _activeDeck.commanderName = card.name;
+      if (_activeDeck != null) _activeDeck.commander = card.name;
       _isDirty = true;
     }
 
@@ -322,17 +322,17 @@ namespace CommanderAILab.UI
       _activeDeck.cards = _deckCards;
       string json = JsonConvert.SerializeObject(_activeDeck);
       string path = $"/api/decks/{_activeDeck.id}";
-      StartCoroutine(ApiClient.Instance.PatchRaw(path, json,
+      ApiClient.Instance.PatchRaw(path, json,
         _ => { _isDirty = false; LoadDecks(); },
-        err => ShowError($"Save failed:\n{err}")));
+        err => ShowError($"Save failed:\n{err}"));
     }
 
     private void OnDeleteDeck()
     {
       if (_activeDeck == null) return;
-      StartCoroutine(ApiClient.Instance.Delete($"/api/decks/{_activeDeck.id}",
+      ApiClient.Instance.Delete($"/api/decks/{_activeDeck.id}",
         _ => { _activeDeck = null; _deckCards.Clear(); LoadDecks(); },
-        err => ShowError($"Delete failed:\n{err}")));
+        err => ShowError($"Delete failed:\n{err}"));
     }
 
     // ── Charts ────────────────────────────────────────────────────────────

unity-client/Assets/Scripts/UI/DeckGeneratorController.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using UnityEngine;
+using UnityEngine.Networking;
 using UnityEngine.UI;
 using UnityEngine.SceneManagement;
 using TMPro;
@@ -114,9 +115,9 @@ namespace CommanderAILab.UI
       string q = commanderSearchInput.text.Trim();
       if (string.IsNullOrEmpty(q)) return;
       string path = $"/api/collection?search={UnityWebRequest.EscapeURL(q)}&type=Legendary+Creature&per_page=20";
-      StartCoroutine(ApiClient.Instance.GetRaw(path,
+      ApiClient.Instance.GetRaw(path,
         json => PopulateCommanderResults(json),
-        err  => ShowError($"Commander search failed:\n{err}")));
+        err  => ShowError($"Commander search failed:\n{err}"));
     }
 
     private void PopulateCommanderResults(string json)

unity-client/Assets/Scripts/UI/PreconController.cs

@@ -2,6 +2,7 @@ using System;
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
+using UnityEngine.Networking;
 using UnityEngine.UI;
 using UnityEngine.SceneManagement;
 using TMPro;
@@ -77,7 +78,7 @@ namespace CommanderAILab.UI
       public string colorIdentity;
       public int    cardCount;
       public string theme;
-      public string imageUrl;
+      public string imageUri;
     }
 
     [Serializable]
@@ -246,11 +247,11 @@ namespace CommanderAILab.UI
         btn.onClick.AddListener(() => ShowDetail(captured));
 
         // Load commander image async
-        if (!string.IsNullOrEmpty(precon.imageUrl))
+        if (!string.IsNullOrEmpty(precon.imageUri))
         {
           var img = card.GetComponentInChildren<Image>();
           if (img != null)
-            StartCoroutine(LoadImageAsync(precon.imageUrl, img));
+            StartCoroutine(LoadImageAsync(precon.imageUri, img));
         }
       }
 
@@ -287,8 +288,8 @@ namespace CommanderAILab.UI
       detailInstallButton.GetComponentInChildren<TMP_Text>().text =
         installed ? "Installed" : "Install to Forge";
 
-      if (!string.IsNullOrEmpty(precon.imageUrl))
+      if (!string.IsNullOrEmpty(precon.imageUri))
-        StartCoroutine(LoadImageAsync(precon.imageUrl, detailCommanderImage));
+        StartCoroutine(LoadImageAsync(precon.imageUri, detailCommanderImage));
     }
 
     // ========================================================

unity-client/Assets/Scripts/UI/ScannerController.cs

@@ -292,8 +292,8 @@ namespace CommanderAILab.UI
             resultSet.text = card.set;
             resultOracleText.text = card.oracleText;
             resultConfidence.text = $"Confidence: {confidence:P0}";
-            if (!string.IsNullOrEmpty(card.imageUrl))
+            if (!string.IsNullOrEmpty(card.imageUri))
-                ImageCache.Instance.GetSprite(card.imageUrl, s => { if (resultCardImage != null) resultCardImage.sprite = s; });
+                ImageCache.Instance.GetSprite(card.imageUri, s => { if (resultCardImage != null) resultCardImage.sprite = s; });
             AddToHistory(card);
         }
 
@@ -320,9 +320,9 @@ namespace CommanderAILab.UI
         {
             if (_scannedCard == null) return;
             var body = JsonConvert.SerializeObject(new { card_id = _scannedCard.id, qty = 1 });
-            StartCoroutine(ApiClient.Instance.PostRaw("/api/collection/add", body,
+            ApiClient.Instance.PostRaw("/api/collection/add", body,
                 _ => cameraStatusText.text = $"Added {_scannedCard.name} to collection",
-                err => ShowError($"Add to collection failed:\n{err}")));
+                err => ShowError($"Add to collection failed:\n{err}"));
         }
 
         private void OnAddToDeck()