ios: fix api endpoint change

ios/AGENTS.md

@@ -35,7 +35,7 @@ Instructions for work under `/Users/buzzert/src/sybil-2/ios`.
 
 ## Practical Notes
 - Default API URL is `http://127.0.0.1:8787` (configurable in-app).
-- Previously saved `/api` API roots are normalized to the server root by the iOS client.
+- The iOS client preserves an explicit `/api` base path for proxied deployments.
 - Provider fallback models:
   - OpenAI: `gpt-4.1-mini`
   - Anthropic: `claude-3-5-sonnet-latest`

ios/Packages/Sybil/Sources/Sybil/SybilAPIClient.swift

@@ -21,12 +21,14 @@ actor SybilAPIClient {
     private let configuration: APIConfiguration
     private let session: URLSession
 
+    @MainActor
     private static let iso8601FormatterWithFractional: ISO8601DateFormatter = {
         let formatter = ISO8601DateFormatter()
         formatter.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
         return formatter
     }()
-
+    
+    @MainActor
     private static let iso8601Formatter: ISO8601DateFormatter = {
         let formatter = ISO8601DateFormatter()
         formatter.formatOptions = [.withInternetDateTime]

ios/Packages/Sybil/Sources/Sybil/SybilSettingsStore.swift

@@ -72,11 +72,6 @@ final class SybilSettingsStore {
             return nil
         }
 
-        let path = components.path.trimmingCharacters(in: CharacterSet(charactersIn: "/"))
-        if path.lowercased() == "api" {
-            components.path = ""
-        }
-
         return components.url
     }
 }

ios/Packages/Sybil/Tests/SybilTests/SybilTests.swift

@@ -1,6 +1,24 @@
 import Testing
 @testable import Sybil
 
-@Test func example() async throws {
-    // Write your test here and use APIs like `#expect(...)` to check expected conditions.
+@MainActor
+@Test func normalizedAPIBaseURLPreservesExplicitAPIPath() async throws {
+    let defaults = UserDefaults(suiteName: #function)!
+    defaults.removePersistentDomain(forName: #function)
+
+    let settings = SybilSettingsStore(defaults: defaults)
+    settings.apiBaseURL = "https://sybil.bajor.cloud/api/"
+
+    #expect(settings.normalizedAPIBaseURL?.absoluteString == "https://sybil.bajor.cloud/api")
+}
+
+@MainActor
+@Test func normalizedAPIBaseURLTrimsWhitespaceAndTrailingSlashes() async throws {
+    let defaults = UserDefaults(suiteName: #function)!
+    defaults.removePersistentDomain(forName: #function)
+
+    let settings = SybilSettingsStore(defaults: defaults)
+    settings.apiBaseURL = "  http://127.0.0.1:8787///  "
+
+    #expect(settings.normalizedAPIBaseURL?.absoluteString == "http://127.0.0.1:8787")
 }