Change default gesture swipes to desktop switching

[klovinad]

Summary

Split out from #94 as requested.

This PR changes the default horizontal gesture-button swipes from browser tab switching to desktop/space switching:

• Left swipe → Previous Desktop
• Right swipe → Next Desktop

Why

AprilNEA asked to keep this UX decision separate from the wheel-scroll settings work, so each change can be reviewed and reverted independently.

The wheel-scroll settings remain in #94. This PR contains only the default gesture remap.

Verification

• cargo fmt --all
• git diff --check

cargo test -p openlogi-core default_gesture_binding --lib was attempted locally, but dependency fetching hung while updating git dependencies before compilation.

[greptile-apps]

Greptile Summary

Swaps the default horizontal gesture-swipe actions from browser tab switching (PrevTab / NextTab) to desktop/space switching (PreviousDesktop / NextDesktop) for the GestureButton. All other directions (Up, Down, Click) are untouched.

• Both Action::PreviousDesktop and Action::NextDesktop are fully defined, categorized, and covered by existing category tests; no new variants were needed.
• Tests in config.rs that verify gesture defaults do so via default_gesture_binding(dir) comparisons, so they automatically validate the new values without any test changes required.

Confidence Score: 5/5

Safe to merge — this is a two-line default value swap with no logic changes, no new variants, and no migration concerns for existing user configs (users who have already customized their gesture bindings are unaffected; only fresh/default installs change).

The changed function only seeds defaults for first-run or freshly-promoted gesture buttons; existing persisted configs are never overwritten. Both target actions are valid, well-tested enum variants. The indirect test coverage in config.rs automatically validates the new defaults.

No files require special attention.

Important Files Changed

Filename	Overview
crates/openlogi-core/src/binding.rs	Two-line default change swapping PrevTab/NextTab to PreviousDesktop/NextDesktop in default_gesture_binding; both target actions are valid, tested variants with no other call-sites affected.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    G[GestureButton swipe] --> D{GestureDirection}
    D -->|Up| MC[Action::MissionControl]
    D -->|Down| SD[Action::ShowDesktop]
    D -->|Left| PD["Action::PreviousDesktop (was PrevTab)"]
    D -->|Right| ND["Action::NextDesktop (was NextTab)"]
    D -->|Click| AE[Action::AppExpose]

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%%{init: {'theme': 'base', 'themeVariables': {"darkMode": true, "background": "#0d1117", "primaryColor": "#21262d", "primaryTextColor": "#e6edf3", "primaryBorderColor": "#8b949e", "lineColor": "#8b949e", "textColor": "#e6edf3", "edgeLabelBackground": "#161b22", "actorBkg": "#21262d", "actorBorder": "#8b949e", "actorTextColor": "#e6edf3", "actorLineColor": "#8b949e", "signalColor": "#8b949e", "signalTextColor": "#e6edf3", "noteBkgColor": "#373320", "noteBorderColor": "#d4a72c", "noteTextColor": "#f0e6c0", "labelBoxBkgColor": "#21262d", "labelBoxBorderColor": "#8b949e", "labelTextColor": "#e6edf3", "loopTextColor": "#e6edf3", "activationBkgColor": "#30363d", "activationBorderColor": "#8b949e"}}}%%
flowchart TD
    G[GestureButton swipe] --> D{GestureDirection}
    D -->|Up| MC[Action::MissionControl]
    D -->|Down| SD[Action::ShowDesktop]
    D -->|Left| PD["Action::PreviousDesktop (was PrevTab)"]
    D -->|Right| ND["Action::NextDesktop (was NextTab)"]
    D -->|Click| AE[Action::AppExpose]

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_{Reviews (3): Last reviewed commit: "Merge branch 'master' into proposal/defa..." | Re-trigger Greptile}