Migrate to vitest: interaction + snapshot chains

[thymikee]

Step 2 of 4: Drop test-only DI with vitest module mocking

Migrate the two independent handler trees that thread dispatch through every function.

Files to migrate (~25 DI params removed)

Interaction chain

src/daemon/handlers/interaction.ts (2 optional params)

• Remove dispatch?: typeof dispatchCommand, readAndroidScreenSize?: typeof getAndroidScreenSize

src/daemon/handlers/interaction-touch.ts (2 optional + 3 required threaded)

• Remove dispatch? and readAndroidScreenSize? from handleTouchInteractionCommands
• Remove dispatch? from normalizeSwipeCoordinates
• Remove required dispatch: typeof dispatchCommand from internal functions (3 occurrences) — these become direct imports

src/daemon/handlers/interaction-common.ts (3 required threaded)

• Remove dispatch: typeof dispatchCommand from 3 internal functions — direct import instead

src/daemon/handlers/interaction-read.ts (1 required threaded)

• Remove dispatch: typeof dispatchCommand — direct import

src/daemon/handlers/interaction-selector.ts (1 required threaded)

• Remove dispatch: typeof dispatchCommand — direct import

Tests to rewrite: __tests__/interaction.test.ts and related

Snapshot chain

src/daemon/handlers/snapshot.ts (3 optional params)

• Remove dispatchSnapshotCommand?, runnerCommand?, sessionlessRunnerCleanup?

src/daemon/handlers/snapshot-wait.ts (2 optional + 3 required threaded)

• Remove dispatchSnapshotCommand?, runnerCommand?
• Remove required dispatchSnapshotCommand from 3 internal functions

src/daemon/handlers/snapshot-alert.ts (1 optional)

• Remove runnerCommand?: typeof runIosRunnerCommand

src/daemon/handlers/snapshot-capture.ts (1 required threaded)

• Remove dispatchSnapshotCommand: typeof dispatchCommand — direct import

Tests to rewrite: __tests__/snapshot-handler.test.ts and related

Validation

• pnpm typecheck
• Both test runners pass
• dispatch as a threaded param is gone from all non-session code

Depends on #281. Part of migration: #1→**#2**→#3→#4