Fix timeline view

[ryokaji]

Issue

The v1.4.4 (f4e2e63) can't render a mw file to a timeline view.
The reason is the viewers which depends on an old version parser are pulled into assets in build process.

What I changed

The same of #12, I confirmed that this can be resolved by the following.

• Updated the dependent packages.
• Updated interfaces in MarkwhenTimelineEditorProvider .

note:

Result

before:

*an error happens

rejected promise not handled within 1 second: TypeError: Cannot read properties of undefined (reading '0')
stack trace: TypeError: Cannot read properties of undefined (reading '0')
	at MarkwhenTimelineEditorProvider.parse (/Users/ryok/work/vscode/markwhen/out/MarkwhenTimelineEditorProvider.js:124:46)
	at async MarkwhenTimelineEditorProvider.updateWebview (/Users/ryok/work/vscode/markwhen/out/MarkwhenTimelineEditorProvider.js:133:9)
rejected promise not handled within 1 second: TypeError: Cannot read properties of undefined (reading '0')
stack trace: TypeError: Cannot read properties of undefined (reading '0')
	at Object.markwhenState (/Users/ryok/work/vscode/markwhen/out/MarkwhenTimelineEditorProvider.js:86:50)
rejected promise not handled within 1 second: TypeError: Cannot read properties of undefined (reading '0')
stack trace: TypeError: Cannot read properties of undefined (reading '0')
	at Object.markwhenState (/Users/ryok/work/vscode/markwhen/out/MarkwhenTimelineEditorProvider.js:86:50)

after:

mw file contents:

Details

title: Welcome to Markwhen!

#Project1: #3d6bc7

meridiem:
  view: "*"

timeline:
  ranges: [2 years]
  center: 2026-06
  style:
    row:
      height: 30
    event:
      bar:
        height: 12
        rx: 3
    dependency:
      strut:
        stroke-width: 0
      line:
        stroke-width: 4
    
# Welcome #welcome
style: section
2026 / 2026-02-14: This example timeline showcases some of markwhen's features.

Feel free to delete everything to start making your own timeline #welcome

2026/2026-03: You can also view an example timeline at [markwhen.com/example](https://markwhen.com/example) #welcome

Or you can save this timeline so you can refer to it later, by going to File -> Save as -> Save to browser.

now: For more information, view the documentation [here](https://docs.markwhen.com) or join the [discord](https://discord.gg/3rTpUD94ac)
#welcome

# All Projects
style: section

## Project 1 #Project1
// Supports ISO8601
2026-01/2026-03: Sub task #John
  id: ProjectStart

3 months: Sub task 2 #Michelle

More info about sub task 2

- [ ] We need to get this done
- [x] And this
- [ ] This one is extra

1 month / 1 week: Check in and verification
  id: verification

!ProjectStart.start / !verification.end: Continuous testing

2026-07-28 / 2026-08-01: Yearly planning #milestone