Ref(DeviceInfo-PaymentResult-WebView):

- Refactor `PaymentResultEntity` to include a nested `PaymentResultDataEntity` and companion factory methods for success and failure.
- Update `PaymentResultStatus` enum members from `OK`/`ERROR` to `SUCCESS`/`FAILURE`.
- Modify `PspService` and its implementations (`P3`, `PS4`, `Stage`) to return a non-nullable `PaymentResultEntity`.
- Enhance `PspWebView` with improved instance lifecycle management, `rememberUpdatedState` for callbacks, and new `onWebViewReady` and `onPageFinished` hooks.
- Optimize `PspWebView` to prevent redundant `loadUrl` calls during recomposition.
- Add `README.md` and `AGENT.md` to provide project architecture overviews and hardware-specific development guidelines.
- Update `TisWebViewScreen` and `StageWebViewScreen` to handle the refactored result models and utilize new WebView callbacks.

.idea/deploymentTargetSelector.xml

@@ -12,10 +12,24 @@
       </SelectionState>
       <SelectionState runConfigName="tis_app">
         <option name="selectionMode" value="DROPDOWN" />
+        <DropdownSelection timestamp="2026-05-12T16:21:58.593804400Z">
+          <Target type="DEFAULT_BOOT">
+            <handle>
+              <DeviceId pluginId="PhysicalDevice" identifier="serial=TP030090489" />
+            </handle>
+          </Target>
+        </DropdownSelection>
         <DialogSelection />
       </SelectionState>
       <SelectionState runConfigName="stage_app">
         <option name="selectionMode" value="DROPDOWN" />
+        <DropdownSelection timestamp="2026-05-12T16:21:58.593804400Z">
+          <Target type="DEFAULT_BOOT">
+            <handle>
+              <DeviceId pluginId="PhysicalDevice" identifier="serial=TP030090489" />
+            </handle>
+          </Target>
+        </DropdownSelection>
         <DialogSelection />
       </SelectionState>
     </selectionStates>