v13.5.0.0: Remove Auto-detect option and improve notifications

- Removed 'Auto-detect' from calendar dropdown (neutral selection handles this automatically)
- Changed default from 'auto' to 'none'
- Added automatic migration from 'auto' to 'none' for existing users
- Simplified getActive() logic (no more auto-detection branching)
- Added notification when canceling dialog only if user is on 'none' with options available
- Updated README to remove 'Auto-detect' references and clarify neutral selection
- Calendar selection is now explicit: users choose from available calendars or stay on 'None'

Author: paulcheeba

README.md

@@ -21,7 +21,7 @@ It supports **D&D 5e v5.2+ native calendar**, **Seasons & Stars**, **Simple Cale
    ```
 
 2. Enable the module in your world.
-3. (Optional) Configure calendar system in settings: Auto-detect (default), D&D 5e Calendar, Simple Calendar Reborn, Seasons & Stars, or None.
+3. (Optional) Configure calendar system in settings: D&D 5e Calendar, Simple Calendar Reborn, Seasons & Stars, or None (default).
 
 > Compatibility: Designed for FVTT v13 (min 13, max 13.x).  
 > **Calendar Support:** D&D 5e v5.2+ native calendar, Seasons & Stars, Simple Calendar Reborn, and core time fallback.  
@@ -38,16 +38,16 @@ About Time Next uses a **calendar adapter system** to integrate with multiple ca
 - **Seasons & Stars**: Full integration with formatted date/time display.
 - **Simple Calendar Reborn**: Full integration with time authority model. Simple Calendar has been reborn as Simple Calendar Reborn (maintained by Arctis Fireblight for Foundry v13+), and we have integrated it with complete time management support.
 
-**Auto-Detection (Default):**
-When set to "Auto-detect", the module uses neutral selection logic:
+**Neutral Calendar Selection:**
+The module uses neutral selection logic with no automatic favoritism:
 - **0 calendars available** → Uses "None" (Foundry core time)
-- **1 calendar available** → Auto-selects that calendar (no favoritism)
+- **1 calendar available** → Auto-selects that calendar
 - **2+ calendars available** → Uses "None" and shows selection dialog
 
 All supported calendars (D&D 5e, Simple Calendar Reborn, Seasons & Stars) are treated equally. The module never automatically picks one third-party calendar over another.
 
 **Calendar Integration Settings:**
-- Dropdown shows **only detected** calendars (plus "Auto-detect" and "None")
+- Dropdown shows **only detected** calendars (plus "None")
 - Detection info panel shows **all calendars** with ✓/✗ status
 - If your selected calendar becomes unavailable, module falls back automatically
 

module/calendar/CalendarAdapter.js

@@ -108,34 +108,36 @@ export class CalendarAdapter {
 
 
     // Get user's calendar system preference
-    let preference = "auto";
+    let preference = "none"; // Default to none (neutral selection)
     try {
-      preference = game.settings.get(MODULE_ID, "calendar-system") || "auto";
+      preference = game.settings.get(MODULE_ID, "calendar-system") || "none";
+      
+      // Migrate legacy "auto" to "none" (auto-detect removed in v13.5.0.0)
+      if (preference === "auto") {
+        preference = "none";
+        try {
+          game.settings.set(MODULE_ID, "calendar-system", "none");
+        } catch {
+          // Ignore migration error
+        }
+      }
     } catch (e) {
       // Setting doesn't exist yet (during migration/first run)
       // Fall back to legacy setting
       try {
         const legacyUseSC = game.settings.get(MODULE_ID, "use-simple-calendar");
         if (legacyUseSC === false) preference = "none";
-        // If true, let auto-detection handle it
+        // If true, let neutral selection handle it
       } catch {
-        // No settings at all, use auto
+        // No settings at all, use none
       }
     }
 
     // Detect available calendar systems
     const available = CalendarAdapter.detectAvailable();
 
-    // Resolve "auto" preference - only auto-select when exactly one calendar available
-    // If multiple calendars available, use "none" and let checkForCalendarChanges() prompt user
+    // Use preference directly (neutral selection via checkForCalendarChanges dialog)
     let choice = preference;
-    if (choice === "auto") {
-      if (available.length === 1) {
-        choice = available[0];
-      } else {
-        choice = "none"; // 0 or 2+ calendars: use core time, prompt user to choose
-      }
-    }
 
     // If user chose a system that's not available, fall back to first available
     if (choice !== "none" && !available.includes(choice)) {
@@ -475,6 +477,9 @@ export class CalendarAdapter {
               console.error(`${MODULE_ID} | Failed to switch calendar:`, e);
               ui.notifications.error("Failed to switch calendar system");
             }
+          } else if (!confirmed && (selected === "none" || selected === "auto") && available.length > 0) {
+            // Only show notification when canceling if user is on "none" and other options exist
+            ui.notifications.info("Calendar system remains set to None");
           }
 
           resolve();

module/settings.js

@@ -14,7 +14,6 @@ export const registerSettings = function () {
 
   const calendarLabelFor = (value) => {
     const names = {
-      auto: "Auto-detect",
       none: "None (Foundry Core Time)",
       dnd5e: "D&D 5e Calendar (v5.2+)",
       "simple-calendar-reborn": "Simple Calendar Reborn",
@@ -173,14 +172,13 @@ export const registerSettings = function () {
     config: true,
     type: String,
     choices: {
-      "auto": "Auto-detect",
       "none": "None (Foundry Core Time)",
       "dnd5e": "D&D 5e Calendar (v5.2+)",
       "simple-calendar-reborn": "Simple Calendar Reborn",
       // "simple-calendar": "Simple Calendar (Legacy)", // ARCHIVED - v13 incompatible
       "seasons-and-stars": "Seasons & Stars"
     },
-    default: "auto",
+    default: "none",
     requiresReload: false,
     onChange: value => {
       // Always-on basic status (users can confirm what they selected).