Deep link: add prompt (#1669)

Example:
open
"dyad://add-prompt?data=eyJ0aXRsZSI6IlRlc3QgUHJvbXB0IiwiZGVzY3JpcHRpb24iOiJBIHRlc3QgcHJvbXB0IGZyb20gZGVlcCBsaW5rIiwiY29udGVudCI6IlRoaXMgaXMgdGhlIGNvbnRlbnQgb2YgdGhlIHByb21wdC4ifQ%3D%3D"

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Adds dyad://add-prompt deep link that navigates to Library and opens a
prefilled Create Prompt dialog from base64 JSON.
> 
> - **Deep Link Handling**
> - Parse `dyad://add-prompt?data=<base64-json>` in `src/main.ts`;
validate with `AddPromptDataSchema` and send `deep-link-received` with
payload.
> - Extend `DeepLinkContext` to navigate to `/library` on `add-prompt`.
> - **Library/Dialogs**
> - Add controlled open state and `prefillData` support to
`CreateOrEditPromptDialog` and `CreatePromptDialog`
(`src/components/CreatePromptDialog.tsx`).
> - In `src/pages/library.tsx`, listen for `add-prompt` deep link,
prefill form, open dialog, and clear deep-link state.
> - **Schemas**
> - Define `AddPromptDataSchema`, `AddPromptPayload`, and
`AddPromptDeepLinkData` in `src/ipc/deep_link_data.ts` and include in
`DeepLinkData` union.
> - **E2E Tests**
> - Add Playwright test `e2e-tests/add_prompt_deep_link.spec.ts` and
ARIA snapshot to verify deep link opens prefilled dialog and saves
prompt.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
1ddb12306cfca195682c8a1b719f60093b858d54. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

src/components/CreatePromptDialog.tsx

@@ -38,6 +38,13 @@ interface CreateOrEditPromptDialogProps {
     content: string;
   }) => Promise<any>;
   trigger?: React.ReactNode;
+  prefillData?: {
+    title: string;
+    description: string;
+    content: string;
+  };
+  isOpen?: boolean;
+  onOpenChange?: (open: boolean) => void;
 }
 
 export function CreateOrEditPromptDialog({
@@ -46,8 +53,14 @@ export function CreateOrEditPromptDialog({
   onCreatePrompt,
   onUpdatePrompt,
   trigger,
+  prefillData,
+  isOpen,
+  onOpenChange,
 }: CreateOrEditPromptDialogProps) {
-  const [open, setOpen] = useState(false);
+  const [internalOpen, setInternalOpen] = useState(false);
+  const open = isOpen !== undefined ? isOpen : internalOpen;
+  const setOpen = onOpenChange || setInternalOpen;
+
   const [draft, setDraft] = useState({
     title: "",
     description: "",
@@ -74,7 +87,7 @@ export function CreateOrEditPromptDialog({
     }
   };
 
-  // Initialize draft with prompt data when editing
+  // Initialize draft with prompt data when editing or prefill data
   useEffect(() => {
     if (mode === "edit" && prompt) {
       setDraft({
@@ -82,10 +95,16 @@ export function CreateOrEditPromptDialog({
         description: prompt.description || "",
         content: prompt.content,
       });
+    } else if (prefillData) {
+      setDraft({
+        title: prefillData.title,
+        description: prefillData.description,
+        content: prefillData.content,
+      });
     } else {
       setDraft({ title: "", description: "", content: "" });
     }
-  }, [mode, prompt, open]);
+  }, [mode, prompt, prefillData, open]);
 
   // Auto-resize textarea when content changes
   useEffect(() => {
@@ -107,6 +126,12 @@ export function CreateOrEditPromptDialog({
         description: prompt.description || "",
         content: prompt.content,
       });
+    } else if (prefillData) {
+      setDraft({
+        title: prefillData.title,
+        description: prefillData.description,
+        content: prefillData.content,
+      });
     } else {
       setDraft({ title: "", description: "", content: "" });
     }
@@ -222,14 +247,30 @@ export function CreateOrEditPromptDialog({
 // Backward compatibility wrapper for create mode
 export function CreatePromptDialog({
   onCreatePrompt,
+  prefillData,
+  isOpen,
+  onOpenChange,
 }: {
   onCreatePrompt: (prompt: {
     title: string;
     description?: string;
     content: string;
   }) => Promise<any>;
+  prefillData?: {
+    title: string;
+    description: string;
+    content: string;
+  };
+  isOpen?: boolean;
+  onOpenChange?: (open: boolean) => void;
 }) {
   return (
-    <CreateOrEditPromptDialog mode="create" onCreatePrompt={onCreatePrompt} />
+    <CreateOrEditPromptDialog
+      mode="create"
+      onCreatePrompt={onCreatePrompt}
+      prefillData={prefillData}
+      isOpen={isOpen}
+      onOpenChange={onOpenChange}
+    />
   );
 }