🎨 Polish: Improve connection status clarity

[yuga-hashimoto]

💡 What

Modified StatusIndicator text label to dynamically change color depending on the current ConnectionState.

🎯 Why

Previously, the StatusIndicator label text used a static text color (MaterialTheme.colorScheme.onSurface) regardless of the connection state, even though the pulsing dot changed color. Applying semantic colors (Green for Connected, surface variant for Connecting, and error red for Disconnected) directly to the label text provides more immediate, clearer visual feedback to the user regarding their connection status, especially when skimming the settings or status overlays.

📸 Before/After

Before: Text label was always onSurface (usually white or black).
After: Text label is Color(0xFF4CAF50) when connected, onSurfaceVariant when connecting, and error when disconnected.

♿ Accessibility

This improvement reinforces the visual state communicated by the pulsing dot, offering an additional vector of information (text color) for users navigating connection states, adhering closer to WCAG recommendations for avoiding reliance on single visual cues (like just a colored dot) by combining it with semantically colored text.

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PR created automatically by Jules for task 4762078492531532447 started by @yuga-hashimoto

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