iOS: codebase cleanup — remove dead code, unify design, deduplicate patterns

- Remove swift-markdown-ui dependency (project.yml, pbxproj, Package.resolved)
- Remove all debug print() statements (APIClient, BrowseViewModel, ChapterReaderViewModel, ChapterReaderView)
- Remove dead UI stubs: isFavorited/isLiked state, heart/star buttons, empty Share/Add to Library menu items in FullPlayerView
- Remove unused audioToolbarButton toolbar builder in ChapterReaderView
- Remove unused model types: NovelListing, BookDetailData, ChapterContent
- Remove amberLight color (never referenced)
- Remove mini player interactive seek (horizontal drag/tap to seek) — progress bar is now display-only
- Fix AccentColor asset to amber #f59e0b (was orange-pink mismatch)
- Fix Discover tab icon: globe → globe.americas.fill
- Fix speed slider max: 3.0 → 2.0 in ProfileView
- Fix yearText: use static DateFormatter instead of allocating on every access
- Fix ChangePasswordView.save(): DispatchQueue.main.asyncAfter → Task.sleep
- Deduplicate navigationDestination blocks via .appNavigationDestination() View extension
- Deduplicate .alert(Error) pattern via .errorAlert() View extension

ios/LibNovel/LibNovel.xcodeproj/project.pbxproj

@@ -24,7 +24,6 @@
 		94D0C4B15734B4056BF3B127 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4B820081FA4817765A39939A /* ContentView.swift */; };
 		9B2D6F241E707312AB80DC31 /* AuthView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7CEF6782A2A28B2A485CBD48 /* AuthView.swift */; };
 		A9B95BAD7CE2DCD1DDDABD4C /* AudioPlayerService.swift in Sources */ = {isa = PBXBuildFile; fileRef = DB13E89E50529E3081533A66 /* AudioPlayerService.swift */; };
-		BD2CA5EE70D102CA3B153485 /* MarkdownUI in Frameworks */ = {isa = PBXBuildFile; productRef = 6313AB4B3A5464F647791174 /* MarkdownUI */; };
 		BE7805A4E78037A82B12AE56 /* PlayerViews.swift in Sources */ = {isa = PBXBuildFile; fileRef = DF49C3AEF9D010F9FEDAB1FC /* PlayerViews.swift */; };
 		C807AD8D627CF6BED47D517C /* HomeViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3AB2E843D93461074A89A171 /* HomeViewModel.swift */; };
 		CFDAA4776344B075A1E3CD6B /* Kingfisher in Frameworks */ = {isa = PBXBuildFile; productRef = 09584EAB68A07B47F876A062 /* Kingfisher */; };
@@ -86,7 +85,6 @@
 			buildActionMask = 2147483647;
 			files = (
 				CFDAA4776344B075A1E3CD6B /* Kingfisher in Frameworks */,
-				BD2CA5EE70D102CA3B153485 /* MarkdownUI in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -327,7 +325,6 @@
 			name = LibNovel;
 			packageProductDependencies = (
 				09584EAB68A07B47F876A062 /* Kingfisher */,
-				6313AB4B3A5464F647791174 /* MarkdownUI */,
 			);
 			productName = LibNovel;
 			productReference = 1B8BF3DB582A658386E402C7 /* LibNovel.app */;
@@ -353,7 +350,6 @@
 			minimizedProjectReferenceProxies = 1;
 			packageReferences = (
 				AFEF7128801A76181793EA9C /* XCRemoteSwiftPackageReference "Kingfisher" */,
-				C963DFA5885608981692ADF1 /* XCRemoteSwiftPackageReference "swift-markdown-ui" */,
 			);
 			preferredProjectObjectVersion = 77;
 			productRefGroup = 6318D3C6F0DC6C8E2C377103 /* Products */;
@@ -670,14 +666,6 @@
 				minimumVersion = 8.0.0;
 			};
 		};
-		C963DFA5885608981692ADF1 /* XCRemoteSwiftPackageReference "swift-markdown-ui" */ = {
-			isa = XCRemoteSwiftPackageReference;
-			repositoryURL = "https://github.com/gonzalezreal/swift-markdown-ui";
-			requirement = {
-				kind = upToNextMajorVersion;
-				minimumVersion = 2.4.0;
-			};
-		};
 /* End XCRemoteSwiftPackageReference section */
 
 /* Begin XCSwiftPackageProductDependency section */
@@ -686,11 +674,6 @@
 			package = AFEF7128801A76181793EA9C /* XCRemoteSwiftPackageReference "Kingfisher" */;
 			productName = Kingfisher;
 		};
-		6313AB4B3A5464F647791174 /* MarkdownUI */ = {
-			isa = XCSwiftPackageProductDependency;
-			package = C963DFA5885608981692ADF1 /* XCRemoteSwiftPackageReference "swift-markdown-ui" */;
-			productName = MarkdownUI;
-		};
 /* End XCSwiftPackageProductDependency section */
 	};
 	rootObject = A10A669C0C8B43078C0FEE9F /* Project object */;

ios/LibNovel/LibNovel.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -9,33 +9,6 @@
         "revision" : "c92b84898e34ab46ff0dad86c02a0acbe2d87008",
         "version" : "8.8.0"
       }
-    },
-    {
-      "identity" : "networkimage",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/gonzalezreal/NetworkImage",
-      "state" : {
-        "revision" : "2849f5323265386e200484b0d0f896e73c3411b9",
-        "version" : "6.0.1"
-      }
-    },
-    {
-      "identity" : "swift-cmark",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/swiftlang/swift-cmark",
-      "state" : {
-        "revision" : "5d9bdaa4228b381639fff09403e39a04926e2dbe",
-        "version" : "0.7.1"
-      }
-    },
-    {
-      "identity" : "swift-markdown-ui",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/gonzalezreal/swift-markdown-ui",
-      "state" : {
-        "revision" : "5f613358148239d0292c0cef674a3c2314737f9e",
-        "version" : "2.4.1"
-      }
     }
   ],
   "version" : 3