web: add next terminal engine release notes

[khoi]

Why

The site has no release entry for the terminal engine update or its user-facing theme, color, scrollback, palette, and SSH changes.

What changed

Added the next release entry with exact theme counts, extended color forms, scrollback limits and compression, command-palette behavior, and remote-host inheritance.

Verification

• vp check passed
• vp test passed 33 tests
• Docs validation and build passed
• Diff and simplify checks passed

The entry remains Next / Pending. The release owner must set its version and date before merge.

Related to SUP-110.

[github-actions]

SupaReview

Findings

The data-only insertion conforms to the existing changelog schema and rendering path, and the code-quality pass found no maintainability issues. One overlapping correctness review found a factual release-note error: the command-palette entry display behavior predates this release and only the clear/reset semantics are new.

Findings

• [P3] Do not present existing command-palette support as a new feature
  

  supaterm/apps/supaterm.com/src/lib/changelog-data.ts

  Line 37 in 6fa9d05

  "Custom command-palette-entry actions now appear in the command palette; clear removes every entry added so far, while an empty value restores the defaults",

  
  Supaterm already surfaced configured command-palette-entry actions before this scoped diff: TerminalHostState+CommandPalette.swift reads runtime?.commandPaletteEntries() and the existing command-palette tests verify configured entries appear. The new behavior in this release is the clear/empty-value handling. Reword this bullet to describe only those new semantics so the changelog does not misattribute existing functionality to the Next release.

Review type: Full review

Full review forced: previous reviewed commit was not reachable.

Reviewers: thermo-nuclear-review-subagent, thermo-nuclear-code-quality-review-subagent

[khoi]

Closing this scope. Supaterm is not preparing a release yet, so this changelog entry should not exist.