feat(mobile): add video playback with native iOS controls - #8919

💭 The only changed web file is types.ts, which drops the local videoMimeType definition and re-exports it from the shared package instead. I need to check whether the imported value is actually used in the file, since an unused import would trigger a lint error.

1. browse_code — apps/web/src/types.ts

2. git_tools — videoMimeType

💭 This web change looks like a pure refactor moving a helper into the shared package, and the type signature is compatible with the previous one, so there's no UI consistency issue. I'm checking whether the shared package's exports are valid, though that's out of scope, and confirming there are no CSS or component changes, so everything looks clear. Since there are no findings, I should respond with a success state formatted as JSON per the schema, using "All clear" as the title and summary. I'm also double-checking that the shared package resolves correctly across web and mobile via its type exports, and that the config points consistently to the source file — everything checks out fine.