fix(cli): prevent UTF-8 panic in explore table wrapping (3.2.3)

[montfort]

Summary

• Fix devtrail explore panic (byte index N is not a char boundary) when Markdown tables contain multi-byte UTF-8 characters (em-dash —, CJK, accents, emoji). wrap_cell_text() now iterates with char_indices() and measures width via unicode-width, guaranteeing safe slice offsets and correct visual widths.
• Align table borders under CJK / double-wide content by padding cells by visual width in render_table_row() instead of format!("{:<width$}", ...) (which counts chars, not columns).
• Add 16 unit tests, including a regression (em_dash_no_panic) that reproduces the original crash and an end-to-end test running the exact table row that triggered it through markdown_to_lines.
• Bump CLI to 3.2.3. unicode-width = "0.2" promoted to a direct optional dep under the existing tui feature (was already transitive via ratatui, so no new compile cost).

Reproduction

Running devtrail explore on a document containing this table row used to panic:

| E-003 | … | Admin role required. RLS middleware adds tenant isolation at DB layer. **Partially mitigated** — RLS is not active until Auth middleware is connected (Etapa 4). |

After this patch the view renders the table without panic and with aligned borders.

Test plan

• cargo test — 64 library tests passing (48 pre-existing + 16 new tui::markdown::tests::*).
• cargo build --no-default-features — compiles (feature gate on unicode-width is respected).
• cargo build --release — compiles; ./target/release/devtrail about reports cli-3.2.3.
• cargo clippy --all-features — no new warnings from this patch (6 pre-existing warnings in files not touched here).
• Manual: ./target/release/devtrail explore <path-with-problematic-doc> opens the document without panic.
• Manual: a table mixing ASCII, CJK and emoji renders with aligned │ borders.

Files changed

• cli/Cargo.toml — bump to 3.2.3, add unicode-width under feature tui.
• cli/Cargo.lock — regenerated (adds unicode-width as direct dep; same version already present transitively).
• cli/src/tui/markdown.rs — rewrite wrap_cell_text, fix visual-width measurement in compute_column_widths and render_table_row, add 16 tests.
• CHANGELOG.md — ## CLI 3.2.3 — UTF-8 Crash Fix in explore Tables section.
• README.md, docs/i18n/es/README.md, docs/i18n/zh-CN/README.md — versioning table bump.
• docs/adopters/CLI-REFERENCE.md and its es/ + zh-CN/ mirrors — version refs bumped.

🤖 Generated with Claude Code