Advanced Paste additional customizations and PhiSilica provider (#46727)

## Summary

Adds an on-device **Phi Silica (Windows AI) paste provider** to Advanced
Paste and richer
per-action customization, plus the **package-identity plumbing** that
lets the unpackaged
Advanced Paste app use Windows AI APIs.

> Note: this supersedes the earlier "self-contained MSIX package
installed/registered by the
> WiX installer" approach. Advanced Paste is **not** packaged or
installed as a standalone
> MSIX. It keeps shipping as the existing unpackaged, self-contained
WinUI 3 executable in
> `WinUI3Apps/` and acquires **package identity at runtime from the
existing PowerToys sparse
> package** — there are no installer or ESRP MSIX repack changes.

## Advanced Paste features

- **New Phi Silica paste provider**
(`CustomActions/PhiSilicaPasteProvider.cs`): an on-device
AI provider backed by the Windows AI Phi Silica language model — no
cloud endpoint or API
key required. Registered as a new `AIServiceType` via
`PasteAIProviderFactory` /
  `AIServiceTypeRegistry`.
- **Additional custom actions** (`AdvancedPasteAdditionalAction`):
user-defined actions with
their own prompt, system prompt, AI provider, and shortcut — plus an
optional "coaching"
prompt/system-prompt/provider/shortcut and shortcut-conflict detection.
- **Built-in default prompts** (`AdvancedPasteDefaultPrompts`) and
updates to
  `AdvancedPasteCustomAction`, `PasteFormat(s)`, `OptionsViewModel`, and
`PasteFormatExecutor` to support per-action provider selection and
system prompts.
- **Settings UI** (`AdvancedPastePage.xaml`/`.xaml.cs`,
`Resources.resw`): configure the
Phi Silica provider, choose a provider per action, edit system/coaching
prompts, and a
Phi Silica availability/readiness experience — Settings queries the
Advanced Paste
executable via `--check-phi-silica`, and a **"Download model"** action
triggers
  `--prepare-phi-silica` to fetch the model and then re-probes.

## Package identity for Windows AI (replaces the MSIX-install approach)

- Phi Silica is a **Limited Access Feature (LAF)** that can only be
unlocked by a process
with a registered **package identity**. Advanced Paste runs unpackaged,
so it obtains
identity from the existing **`Microsoft.PowerToys.SparseApp`** sparse
package
(`src/PackageIdentity/`): a new `<Application
Id="PowerToys.AdvancedPasteUI">` entry in
`AppxManifest.xml` maps it to `PowerToys.AdvancedPaste.exe`, with
matching updates to
  `BuildSparsePackage.ps1`.
- **LAF unlock** at runtime via `PhiSilicaLafHelper.cs`. The
token/attestation are baked at
build time by the `GeneratePhiSilicaLafCredentials` MSBuild target into
`PhiSilicaLafCredentials.g.cs` — local **dev defaults** live in
`src/PhiSilicaLaf.props`
(imported from `Directory.Build.props`) and the **production secret** is
injected via
  `/p:` in the release pipeline.
- New **`AdvancedPaste.dev.manifest` / `AdvancedPaste.prod.manifest`**
application manifests
(selected by `CIBuild`) declaring full-trust and the system AI models
capability.

## Build & pipeline

- **Windows App SDK** moved to the coherent **stable `2.2.0`** line and
**added
`Microsoft.WindowsAppSDK.AI` `2.2.3`** (the Phi Silica APIs). Foundation
`2.1.0` carries the
sparse-identity PRI fix, and the stable AI build matches the OS Windows
AI runtime.
- **Independent versioning** for Advanced Paste
(`src/modules/AdvancedPaste/custom.props`,
XES one-store versioning, `AdvancedPasteVersion`). A
`steps-setup-versioning.yml` step is
added for Advanced Paste in `job-build-project.yml`, ordered **before**
CmdPal to avoid a
  version-collision installer failure (WIX0103).
- `release.yml` passes `PhiSilicaLafToken`/`PhiSilicaLafAttestation`
into the main build;
  spell-check allow-list/patterns updated.
- Removed now-unneeded dependencies: the
`Microsoft.Windows.Compatibility` reference and the
  `Common.UI` "force matching DLL versions" hack.
  
<img width="1073" height="716" alt="image"
src="https://github.com/user-attachments/assets/9364d86a-c0d1-4a08-a669-d98cbcb4b140"
/>
<img width="1038" height="308" alt="image"
src="https://github.com/user-attachments/assets/00eef1dd-b407-4841-bd64-f54f8a145c46"
/>
<img width="194" height="405" alt="image"
src="https://github.com/user-attachments/assets/d2f9c5bb-2507-4112-b3e0-56da681f88ea"
/>
<img width="489" height="453" alt="image"
src="https://github.com/user-attachments/assets/811d1afd-9993-48be-824e-82bb56c5ceca"
/>

[Video clip
internal](https://onedrive.cloud.microsoft/✌️/a@9n6nl3fp/S/cQpvAHrL5M9ZR6eUawztyfyBEgUCwCF-aKg9TbKyyGWP4c0KMA)

[Build
internal](https://microsoft.visualstudio.com/Dart/_build/results?buildId=149920754&view=artifacts&pathAsName=false&type=publishedArtifacts)

---------

Co-authored-by: Niels Laute <niels.laute@live.nl>
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

src/modules/AdvancedPaste/AdvancedPasteModuleInterface/dllmain.cpp

@@ -66,6 +66,8 @@ namespace
     const wchar_t JSON_KEY_PROVIDERS[] = L"providers";
     const wchar_t JSON_KEY_SERVICE_TYPE[] = L"service-type";
     const wchar_t JSON_KEY_ENABLE_ADVANCED_AI[] = L"enable-advanced-ai";
+    const wchar_t JSON_KEY_COACHING_SHORTCUT[] = L"coaching-shortcut";
+    const wchar_t JSON_KEY_COACHING_ENABLED[] = L"coaching-enabled";
     const wchar_t JSON_KEY_VALUE[] = L"value";
 }
 
@@ -255,6 +257,21 @@ private:
             };
 
             m_additional_actions.push_back(additionalAction);
+
+            // Register coaching shortcut as a separate hotkey with a "-coaching" suffix ID
+            if (action.HasKey(JSON_KEY_COACHING_SHORTCUT) && action.GetNamedBoolean(JSON_KEY_COACHING_ENABLED, false))
+            {
+                auto coachingHotkey = parse_single_hotkey(action.GetNamedObject(JSON_KEY_COACHING_SHORTCUT), actionIsShown);
+                if (coachingHotkey.key != 0)
+                {
+                    const AdditionalAction coachingAction
+                    {
+                        std::wstring(actionName.c_str()) + L"-coaching",
+                        coachingHotkey
+                    };
+                    m_additional_actions.push_back(coachingAction);
+                }
+            }
         }
         else
         {
@@ -407,6 +424,7 @@ private:
                         // Define the expected order to ensure consistent hotkey ID assignment
                         const std::vector<winrt::hstring> expectedOrder = {
                             L"image-to-text",
+                            L"fix-spelling-and-grammar",
                             L"paste-as-file",
                             L"transcode"
                         };
@@ -982,6 +1000,12 @@ public:
         m_triggerEventWaiter.start(CommonSharedConstants::ADVANCED_PASTE_SHOW_UI_EVENT, [this](DWORD) {
             // Same logic as hotkeyId == 1 (m_advanced_paste_ui_hotkey)
             Logger::trace(L"AdvancedPaste ShowUI event triggered");
+
+            if (m_auto_copy_selection_custom_action)
+            {
+                send_copy_selection(); // best-effort; ignore failure
+            }
+
             m_process_manager.start();
             m_process_manager.bring_to_front();
             m_process_manager.send_message(CommonSharedConstants::ADVANCED_PASTE_SHOW_UI_MESSAGE);
@@ -1032,13 +1056,11 @@ public:
                 }
             }
 
-            if (is_custom_action_hotkey && m_auto_copy_selection_custom_action)
+            // Try to capture selected text for all hotkey actions when the setting is enabled.
+            // If nothing is selected (clipboard unchanged), fall through to use existing clipboard content.
+            if (m_auto_copy_selection_custom_action)
             {
-                if (!send_copy_selection())
-                {
-                    Logger::warn(L"Auto-copy: failed to copy selection for custom action index {} — aborting action", custom_action_index);
-                    return false;
-                }
+                send_copy_selection(); // best-effort; ignore failure
             }
 
             m_process_manager.start();