[Feature] Iterative Generation Workflow - Step-by-Step and Auto-Run Modes

[vzeman]

Summary

Implement the two primary workflow modes for generating scenes: a manual iterative mode where the user reviews each generation before proceeding, and a fully automated mode that processes all scenes without human intervention. A hybrid mode bridges the two approaches.

Requirements

Manual (Iterative) Mode

• Generate one scene at a time
• After each generation, user reviews and decides: Approve, Regenerate, Edit Params, Skip
• Clear visual state machine: what was done, what is next
• "Approve & Continue" advances to next scene
• Ability to go back and redo any previous scene
• Generation queue shows pending, in-progress, completed, skipped
• Pause and resume at any point

Auto-Run Mode

• "Generate All" button processes all scenes without waiting for user input
• Configurable auto-approval: always auto-approve, or approve after quality check
• AI quality checker: Claude Vision analyzes each generated video frame for quality issues
• Auto-retry on quality failure (configurable retries)
• Progress dashboard: overall progress, time remaining, cost so far
• Notifications on completion (push notification, sound)
• Cancel auto-run mid-process

Hybrid Mode

• Auto-generate, but pause at flagged scenes (quality issues, missing first frame)
• User sets breakpoints: "pause before scene 5"

Scene Validation Checklist

• Video generated
• Duration matches target
• First frame matches expected
• Last frame suitable for next scene
• Audio generated
• User approved

Acceptance Criteria

• Manual mode steps through scenes one at a time with clear UI state
• Auto-run mode generates all scenes and shows live progress
• Claude Vision quality check flags poor quality outputs
• Auto-retry on failure works up to configured retry limit
• Hybrid mode pauses at user-defined breakpoints

Related

Part of the ai-video-editor Flutter application. Orchestrates #65 (AI Video Generation), #67 (Voice Generation), and #69 (Video Player).