Use user info proxy (#1963)

<!-- CURSOR_SUMMARY -->
> [!NOTE]
> Switches budget fetch to `https://api.dyad.sh/v1/user/info` and
validates/consumes `usedCredits`, `totalCredits`, and `budgetResetDate`
directly via Zod.
> 
> - **IPC/Pro handlers (`src/ipc/handlers/pro_handlers.ts`)**:
> - **Endpoint**: Update user info URL to
`https://api.dyad.sh/v1/user/info`.
> - **Validation**: Add `zod` schema `UserInfoResponseSchema` to
validate API response.
> - **Data mapping**: Use `usedCredits`, `totalCredits`,
`budgetResetDate`, and `userId` from response directly; remove
conversion logic and old nested `user_info` parsing.
> - **Redaction**: Compute `redactedUserId` from `userId` and return
parsed `UserBudgetInfo`.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
da1f192c2cabb2154bd10b69555c27d62fbb6368. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

<!-- This is an auto-generated description by cubic. -->
## Summary by cubic
Switched user budget fetch to the new user info proxy and added schema
validation. Uses API-provided credits directly and removes the old
conversion logic.

- **Refactors**
  - Use https://api.dyad.sh/v1/user/info instead of llm-gateway.
- Validate response with a Zod schema (usedCredits, totalCredits,
budgetResetDate, userId).
  - Map fields directly to UserBudgetInfo and remove CONVERSION_RATIO.
  - Keep redacted user ID format (****1234).

- **Dependencies**
- Removed unused html-dom-parser, html-react-parser, and react-property
from the lockfile.

<sup>Written for commit da1f192c2cabb2154bd10b69555c27d62fbb6368.
Summary will update automatically on new commits.</sup>

<!-- End of auto-generated description by cubic. -->

package-lock.json

@@ -12898,37 +12898,6 @@
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-        "htmlparser2": "10.0.0"
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-    "node_modules/html-react-parser": {
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-      "license": "MIT",
-      "dependencies": {
-        "domhandler": "5.0.3",
-        "html-dom-parser": "5.1.1",
-        "react-property": "2.0.2",
-        "style-to-js": "1.1.17"
-      },
-      "peerDependencies": {
-        "@types/react": "0.14 || 15 || 16 || 17 || 18 || 19",
-        "react": "0.14 || 15 || 16 || 17 || 18 || 19"
-      },
-      "peerDependenciesMeta": {
-        "@types/react": {
-          "optional": true
-        }
-      }
-    },
     "node_modules/html-to-image": {
       "version": "1.11.13",
       "resolved": "https://registry.npmjs.org/html-to-image/-/html-to-image-1.11.13.tgz",
@@ -17952,12 +17921,6 @@
         "react": ">=18"
       }
     },
-    "node_modules/react-property": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/react-property/-/react-property-2.0.2.tgz",
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-      "license": "MIT"
-    },
     "node_modules/react-reconciler": {
       "version": "0.33.0",
       "resolved": "https://registry.npmjs.org/react-reconciler/-/react-reconciler-0.33.0.tgz",