* ## Summary
Fixed the string slicing panic in [crates/local-deployment/src/container.rs](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/vk-0ec9-summary-er/crates/local-deployment/src/container.rs#L1106-L1118). The issue was at line 1109 where `&summary[..summary.len().min(100)]` used byte-based slicing, causing a panic when byte index 100 fell inside the multi-byte UTF-8 character ✨.
**Solution implemented:**
- Replaced byte-based slicing with character-aware slicing using `char_indices()`
- The fix ensures slicing only occurs at valid UTF-8 character boundaries
- No allocation overhead - uses the Oracle-recommended approach with string slices
The code now safely truncates to the first 100 Unicode characters (or end of string if shorter) without risking panics on multi-byte characters.
* Fixed. Removed the problematic debug log entirely from the [`update_executor_session_summary` function](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/vk-0ec9-summary-er/crates/local-deployment/src/container.rs#L1105-L1106). This eliminates the UTF-8 string slicing panic without adding complexity.
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