Fix/UI problems

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Context

This PR improves the gameboard touch interaction and fixes layout issues on devices with different screen sizes and virtual navigation buttons.

Until now, zooming the gameboard only worked reliably when the touch points started between cards. Since the cards are placed close together, this made pinch-to-zoom difficult during normal gameplay. The gameboard also started with a default zoom level that could be too large, so not all cards were visible initially. Additionally, the app used fullscreen edge-to-edge behavior, which could cause UI elements to overlap with Android navigation buttons and accidentally minimize the app.

The goal of this PR is to make the gameboard easier to control, show the full board by default, and prevent important UI controls from being covered by system navigation.

Description

The gameboard now supports pinch-to-zoom gestures even when both fingers start on top of cards. Two-finger gestures are detected at the board level before card buttons handle touch input, so zooming through cards works without accidentally selecting cards.

The initial gameboard scale is now calculated dynamically based on the available board container size. This ensures that all cards are visible when the gameboard is opened, while still allowing players to freely zoom and pan afterwards.

Fullscreen edge-to-edge system bar handling was removed from the main activity. This prevents the UI from drawing underneath virtual Android navigation buttons, avoiding overlap with controls such as the clue send button.

Changes in the code base

• Added board-level transform gesture handling for the gameboard
• Enabled pinch-to-zoom gestures even when touch points start on card buttons
• Added suppression of card clicks while a board transform gesture is active
• Prevented accidental card selection after two-finger zoom gestures
• Added dynamic initial board scale calculation based on available board size
• Measured the gameboard container size to calculate a fitting default zoom level
• Reset the initial board offset so the full card grid is visible on game start
• Kept manual zooming and panning behavior available after the default scale is applied
• Added minimum and maximum board scale constants for consistent zoom limits
• Updated the gameboard grid transform origin so scaled content stays aligned correctly
• Removed fullscreen edge-to-edge system bar handling from MainActivity
• Removed forced hiding of Android system bars
• Prevented UI overlap with virtual Android navigation buttons
• Improved gameboard usability on devices with different screen sizes and navigation modes

Changes outside the code base

N/A

Additional information

This PR does not change backend behavior or game rules. It only improves frontend interaction and layout behavior.

The card spacing remains unchanged. The improved zoom behavior is achieved by handling two-finger gestures at the board level instead of increasing the distance between cards.

The default board scale is only used as the initial view state. Players can still zoom in, zoom out, and move the board manually during gameplay.

Recommended verification:

• Start a game and confirm that all cards are visible when the gameboard opens
• Pinch-to-zoom with both fingers placed directly on cards
• Confirm that zooming does not accidentally select cards
• Confirm that single card taps still select/reveal cards as before
• Test on a device or emulator with virtual navigation buttons
• Verify that the clue send button is no longer covered by system navigation
• Run testDebugUnitTest
• Run ktlintCheck

[the-only-queen-anna]

Man kann die Cards noch nicht zu 100% sehen, soll ich das übernehmen, oder geht sich das bei dir noch aus? den Text sieht man theoretisch schon, es gehört nur noch bisschen kleiner, sodass man oben und unten auch die ganze Card sieht

[ad-devel]

Ja kannst du das bitte übernehmen? Wäre echt super!

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud