Implement Categories and Hashtag Endpoints in Create Wager screen

[akintewe]

What type of PR is this? (check all applicable)

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update

Related Tickets & Documents

• Closes STRKWAGR-42 [Mobile] : IMPLEMENT GET ALL CATEGORIES & HASHTAG ENDPOINT #98

Screenshots, Recordings, QA Instructions (if applicable)
r (31938): [🌎 Easy Localization] [WARNING] Localization key [Stake] not found
I/flutter (31938): *** Response ***
I/flutter (31938): uri: https://starkwager-backend.onrender.com/hashtags
I/flutter (31938): statusCode: 200
I/flutter (31938): headers:
I/flutter (31938): connection: keep-alive
I/flutter (31938): x-render-origin-server: Render
I/flutter (31938): access-control-allow-origin: *
I/flutter (31938): transfer-encoding: chunked
I/flutter (31938): date: Sun, 27 Apr 2025 13:07:18 GMT
I/flutter (31938): content-encoding: gzip
I/flutter (31938): vary: Accept-Encoding
I/flutter (31938): cf-cache-status: DYNAMIC
I/flutter (31938): content-type: application/json; charset=utf-8
I/flutter (31938): rndr-id: de607783-b94b-4a74
I/flutter (31938): server: cloudflare
I/flutter (31938): x-powered-by: Express
I/flutter (31938): alt-svc: h3=":443"; ma=86400
I/flutter (31938): cf-ray: 936e8ac5ccfc6fe8-CDG
I/flutter (31938): etag: W/"2-l9Fw4VUO7kr8CvBlt4zaMCqXZ0w"
I/flutter (31938): Response Text:
I/flutter (31938): []

38): *** Request ***
I/flutter (31938): uri: https://starkwager-backend.onrender.com/hashtags
I/flutter (31938): method: GET
I/flutter (31938): responseType: ResponseType.json
I/flutter (31938): followRedirects: true
I/flutter (31938): persistentConnection: true
I/flutter (31938): connectTimeout: 0:00:30.000000
I/flutter (31938): sendTimeout: null
I/flutter (31938): receiveTimeout: 0:00:30.000000
I/flutter (31938): receiveDataWhenStatusError: true
I/flutter (31938): extra: {}
I/flutter (31938): headers:
I/flutter (31938): data:
I/flutter (31938): null

This PR implements API integration for fetching categories and hashtags in the Create Wager screen.

Testing Instructions:

1. Use a physical device
2. On the Connect Wallet screen, click on the MetaMask option
3. Complete the wallet connection process
4. After successful connection, the app will call the create-login endpoint and store the token
5. Navigate to the Create Wager screen to see categories and hashtags loaded from the API

Key Changes:

• Created data models for Categories and Hashtags
• Implemented repository interfaces and remote datasources
• Added loading states and error handling in UI
• Fixed hashtag dialog UI overflow issue
• Implemented fallback to hardcoded values if API calls fail

[Hoossayn]

Good work on the api implementation @akintewe

however, your changes affected the UI

[akintewe]

@Hoossayn