chore(app): remove stale frontend dependencies - #42464

What

Remove verified-unused frontend dependency declarations from @opencode-ai/app, @opencode-ai/ui, and @opencode-ai/session-ui, then regenerate bun.lock.

How

• Removes @solid-primitives/active-element, audio, scroll, timer, and websocket from packages/app.
• Removes @solid-primitives/bounds from packages/ui and packages/session-ui.
• Removes direct @shikijs/[email protected] declarations from all three packages.
• Re-verifies no references in package source, scripts, configs, tests, or generated files.

Impact

The nine removed graph nodes are the seven requested package/version nodes plus @shikijs/[email protected] and @shikijs/[email protected], which were retained only by @shikijs/[email protected]. Shared Solid primitive support nodes remain installed and are excluded from the savings.

Scope

Transformer versions remain where still required elsewhere in the workspace: @shikijs/[email protected] for packages/web / @pierre/diffs, and @shikijs/[email protected] through blume.

Testing

• bun install
• bun typecheck in packages/app, packages/ui, and packages/session-ui
• bun run test in packages/ui: 27 passed
• bun run test in packages/session-ui: 83 passed
• bun run test:browser in packages/app: 41 passed
• bun run build in packages/app and packages/ui
• .husky/pre-push: workspace typecheck passed (35 tasks)
• bun run test in packages/app: 696 passed, 13 skipped, with one unrelated locale-data failure where pa-PK resolves to en instead of expected pa; the browser suite was run independently and passed