Optional image generation models, and install and launcher fixes (0.4.2)

[KBRASK]

0.4.2: Adds optional image generation models: generate and edit pictures, make several views for character cards, and let the agent use them. Also fixes several install and launcher issues.

• Adds optional image generation models. "Generate with AI" in the media panel makes a picture from one sentence on a blank canvas, and "Edit this" in the image editor changes the current picture, with up to two more pictures from your media as references.
• With the image generation models installed, character cards start from a front view and use it as the reference for three-quarter, side, back and close-up views; scene cards are made the same way.
• The agent can generate or edit pictures and add them to your media, and can first make a frame with people placed as described, then generate the video from it.
• Setup can install the image generation models at the same time (about 16 GB), and existing installs can download them in the background from the launcher; the download pauses while a video is generating.
• Online installs into a folder the system code page cannot spell, such as a Chinese folder on an English system, no longer fail at the kernel check.
• On Linux, when the system compiler is newer than the installed GPU toolkit supports, setup now uses a compatible compiler instead of stopping while building the GPU attention component.
• When a Windows security feature blocks files FreeVideo needs, the error card now says so and notes that the setting may need to be changed in Windows.
• After a launcher error, an address or path being typed in the settings is no longer reset to its previous value.
• When the agent makes a film, a shot that continues the previous one is at least 10 seconds long, 10 seconds by default; a length this computer cannot make in one run is reported before generation starts.
• In AI Autopilot, the conversation list updates as soon as a job starts or stops, and switching conversations quickly stays on the one selected.