fix(inventory): preserve form state across re-renders

Fixes bug where expanding an existing storage location would close
the "Add Location" form that was currently open. This happened
because renderInventory() recreated all HTML from scratch, resetting
all inline forms to hidden state.

Solution:
- Track open form states in inventoryActions module
- Restore form visibility after each re-render
- Applies to all inline forms: add location, add items (on person,
  stored, assets)

This also fixes the related issue where switching tabs would close
open forms.

Fixes: Location disappears when expanding while adding new location

src/systems/interaction/inventoryActions.js

@@ -24,6 +24,17 @@ let currentActiveSubTab = 'onPerson';
  */
 let collapsedLocations = [];
 
+/**
+ * Tracks which inline forms are currently open
+ * @type {Object}
+ */
+let openForms = {
+    addLocation: false,
+    addItemOnPerson: false,
+    addItemStored: {}, // { [locationName]: true/false }
+    addItemAssets: false
+};
+
 /**
  * Updates lastGeneratedData.userStats to include current inventory in text format.
  * This ensures the AI context stays synced with manual edits.
@@ -56,9 +67,18 @@ export function showAddItemForm(field, location) {
         const locationId = location.replace(/\s+/g, '-');
         formId = `rpg-add-item-form-stored-${locationId}`;
         inputId = `.rpg-location-item-input[data-location="${location}"]`;
+        // Track in state
+        if (!openForms.addItemStored) openForms.addItemStored = {};
+        openForms.addItemStored[location] = true;
     } else {
         formId = `rpg-add-item-form-${field}`;
         inputId = `#rpg-new-item-${field}`;
+        // Track in state
+        if (field === 'onPerson') {
+            openForms.addItemOnPerson = true;
+        } else if (field === 'assets') {
+            openForms.addItemAssets = true;
+        }
     }
 
     const form = $(`#${formId}`);
@@ -81,9 +101,19 @@ export function hideAddItemForm(field, location) {
         const locationId = location.replace(/\s+/g, '-');
         formId = `rpg-add-item-form-stored-${locationId}`;
         inputId = `.rpg-location-item-input[data-location="${location}"]`;
+        // Clear from state
+        if (openForms.addItemStored && openForms.addItemStored[location]) {
+            delete openForms.addItemStored[location];
+        }
     } else {
         formId = `rpg-add-item-form-${field}`;
         inputId = `#rpg-new-item-${field}`;
+        // Clear from state
+        if (field === 'onPerson') {
+            openForms.addItemOnPerson = false;
+        } else if (field === 'assets') {
+            openForms.addItemAssets = false;
+        }
     }
 
     const form = $(`#${formId}`);
@@ -189,6 +219,9 @@ export function showAddLocationForm() {
     const form = $('#rpg-add-location-form');
     const input = $('#rpg-new-location-name');
 
+    // Track in state
+    openForms.addLocation = true;
+
     form.show();
     input.val('').focus();
 }
@@ -200,6 +233,9 @@ export function hideAddLocationForm() {
     const form = $('#rpg-add-location-form');
     const input = $('#rpg-new-location-name');
 
+    // Clear from state
+    openForms.addLocation = false;
+
     form.hide();
     input.val('');
 }
@@ -482,3 +518,50 @@ export function getInventoryRenderOptions() {
         collapsedLocations
     };
 }
+
+/**
+ * Restores the state of inline forms after re-rendering.
+ * This ensures forms that were open before re-render are shown again.
+ */
+export function restoreFormStates() {
+    // Restore add location form
+    if (openForms.addLocation) {
+        const form = $('#rpg-add-location-form');
+        const input = $('#rpg-new-location-name');
+        if (form.length > 0) {
+            form.show();
+            // Don't refocus to avoid disrupting user interaction
+        }
+    }
+
+    // Restore add item on person form
+    if (openForms.addItemOnPerson) {
+        const form = $('#rpg-add-item-form-onPerson');
+        const input = $('#rpg-new-item-onPerson');
+        if (form.length > 0) {
+            form.show();
+        }
+    }
+
+    // Restore add item assets form
+    if (openForms.addItemAssets) {
+        const form = $('#rpg-add-item-form-assets');
+        const input = $('#rpg-new-item-assets');
+        if (form.length > 0) {
+            form.show();
+        }
+    }
+
+    // Restore add item stored forms (for each location)
+    if (openForms.addItemStored && typeof openForms.addItemStored === 'object') {
+        for (const location in openForms.addItemStored) {
+            if (openForms.addItemStored[location]) {
+                const locationId = location.replace(/\s+/g, '-');
+                const form = $(`#rpg-add-item-form-stored-${locationId}`);
+                if (form.length > 0) {
+                    form.show();
+                }
+            }
+        }
+    }
+}

src/systems/rendering/inventory.js

@@ -4,7 +4,7 @@
  */
 
 import { extensionSettings, $inventoryContainer } from '../../core/state.js';
-import { getInventoryRenderOptions } from '../interaction/inventoryActions.js';
+import { getInventoryRenderOptions, restoreFormStates } from '../interaction/inventoryActions.js';
 import { parseItems } from '../../utils/itemParser.js';
 
 // Type imports
@@ -425,6 +425,9 @@ export function updateInventoryDisplay(containerId, options = {}) {
     const inventory = extensionSettings.userStats.inventory;
     const html = generateInventoryHTML(inventory, options);
     container.innerHTML = html;
+
+    // Restore form states after re-rendering
+    restoreFormStates();
 }
 
 /**
@@ -447,6 +450,9 @@ export function renderInventory() {
     // Generate HTML and update DOM
     const html = generateInventoryHTML(inventory, options);
     $inventoryContainer.html(html);
+
+    // Restore form states after re-rendering (fixes Bug #1)
+    restoreFormStates();
 }
 
 /**