3586fcb802
Fixes #11845. Adjust context/token estimation for inline image `data:*;base64,...` URLs so we do not count the raw base64 payload as model-visible text. What changed: - keep the existing JSON-length estimator as the baseline - detect only inline base64 `data:` image URLs in message and function-call output content items - subtract only the base64 payload bytes (preserving data URL prefix + JSON overhead) - add a fixed per-image estimate of 340 bytes (~85 tokens at the repo’s 4-bytes/token heuristic) This avoids large overestimates from MCP image tool outputs while leaving normal image URLs (`https://`, `file://`, non-base64 `data:` URLs) unchanged. Tests: - message image data URL estimate regression - function-call output image data URL estimate regression - non-base64 image URLs unchanged - non-base64 `data:` URLs unchanged - `data:application/octet-stream;base64,...` adjusted - multiple inline images apply multiple fixed costs - text-only items unchanged
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