fix: remove deprecated keyboard option from vis-timeline

[fanxing11]

vis-timeline v7 dropped the keyboard configuration option (it was part of the original vis.js library). Passing it triggers a console warning:

Unknown option detected: "keyboard". Did you mean "end"?

This shows up as an error in the Raw Data view — reported in ActivityWatch/aw-server-rust#603.

The fix just removes the keyboard block from VisTimeline.vue options. horizontalScroll is kept since it's still a valid vis-timeline v7 option.

[greptile-apps]

Greptile Summary

Removes the keyboard configuration block from VisTimeline.vue to eliminate the "Unknown option detected: keyboard" console warning produced by vis-timeline v7, which dropped that option from its predecessor vis.js. horizontalScroll is retained as it remains valid in v7.

• The deleted block (keyboard: { enabled: true, speed: { x: 10, y: 0, zoom: 0.02 } }) was silently ignored by vis-timeline v7, so its removal has no functional impact on keyboard navigation behavior.
• The inline comment is updated from "Keyboard & scroll navigation" to "Horizontal scroll navigation" to accurately reflect what remains.

Confidence Score: 5/5

Safe to merge — removes a four-line option block that vis-timeline v7 already ignores, eliminating a spurious console warning with no change in runtime behaviour.

The change is a strict removal of a configuration key that vis-timeline v7 no longer recognises. Because the library was already silently ignoring the block, no keyboard-navigation behaviour changes between the before and after states. The comment is also updated to stay accurate.

No files require special attention.

Important Files Changed

Filename	Overview
src/visualizations/VisTimeline.vue	Removes the deprecated keyboard vis-timeline option that triggered a console warning in v7; keeps horizontalScroll unchanged and updates the adjacent comment to reflect the remaining option.

Sequence Diagram

sequenceDiagram
    participant Vue as VisTimeline.vue
    participant vt as vis-timeline v7

    Note over Vue,vt: Before fix
    Vue->>vt: "new Timeline(el, [], [], { horizontalScroll, keyboard: {...} })"
    vt-->>Vue: ⚠️ Console warning: "Unknown option detected: keyboard"

    Note over Vue,vt: After fix
    Vue->>vt: "new Timeline(el, [], [], { horizontalScroll })"
    vt-->>Vue: ✅ No warning, timeline initialises cleanly

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