feat(me): add "since last check" cursor-based inbox to dashboard

Implements a cursor-based notification inbox that surfaces actionable
events from others since the user's last `lore me` invocation. This
addresses the core UX need: "what happened while I was away?"

Event Sources (three-way UNION query):
1. Others' comments on user's open issues/MRs
2. @mentions on ANY item (not restricted to owned items)
3. Assignment/review-request system notes mentioning user

Mention Detection:
- SQL LIKE pre-filter for performance, then regex validation
- Word-boundary-aware: rejects "alice" in "@alice-bot" or "alice@corp.com"
- Domain rejection: "@alice.com" not matched (prevents email false positives)
- Punctuation tolerance: "@alice," "@alice." "(@ alice)" all match

Cursor Watermark Pattern:
- Global watermark computed from ALL projects before --project filtering
- Ensures --project display filter doesn't permanently skip events
- Cursor advances only after successful render (no data loss on errors)
- First run establishes baseline (no inbox shown), subsequent runs show delta

Output:
- Human: color-coded event badges, grouped by entity, actor + timestamp
- Robot: standard envelope with since_last_check object containing
  cursor_iso, total_event_count, and groups array with nested events

CLI additions:
- --reset-cursor flag: clears cursor (next run shows no new events)
- Autocorrect: --reset-cursor added to known me command flags

Tests cover:
- Mention with trailing comma/period/parentheses (should match)
- Email-like text "@alice.com" (should NOT match)  
- Domain-like text "@alice.example" (should NOT match)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/cli/commands/me/render_human.rs

@@ -2,6 +2,7 @@ use crate::cli::render::{self, Align, GlyphMode, Icons, LoreRenderer, StyledCell
 
 use super::types::{
     ActivityEventType, AttentionState, MeActivityEvent, MeDashboard, MeIssue, MeMr, MeSummary,
+    SinceLastCheck,
 };
 
 // ─── Layout Helpers ─────────────────────────────────────────────────────────
@@ -475,10 +476,113 @@ fn format_entity_ref(entity_type: &str, iid: i64) -> String {
     }
 }
 
+// ─── Since Last Check ────────────────────────────────────────────────────────
+
+/// Print the "since last check" section at the top of the dashboard.
+pub fn print_since_last_check_section(since: &SinceLastCheck, single_project: bool) {
+    let relative = render::format_relative_time(since.cursor_ms);
+
+    if since.groups.is_empty() {
+        println!(
+            "\n    {}",
+            Theme::dim().render(&format!(
+                "No new events since {} ({relative})",
+                render::format_datetime(since.cursor_ms),
+            ))
+        );
+        return;
+    }
+
+    println!(
+        "{}",
+        render::section_divider(&format!("Since Last Check ({relative})"))
+    );
+
+    for group in &since.groups {
+        // Entity header: !247  Fix race condition...
+        let ref_str = match group.entity_type.as_str() {
+            "issue" => format!("#{}", group.entity_iid),
+            "mr" => format!("!{}", group.entity_iid),
+            _ => format!("{}:{}", group.entity_type, group.entity_iid),
+        };
+        let ref_style = match group.entity_type.as_str() {
+            "issue" => Theme::issue_ref(),
+            "mr" => Theme::mr_ref(),
+            _ => Theme::bold(),
+        };
+
+        println!();
+        println!(
+            "    {}  {}",
+            ref_style.render(&ref_str),
+            Theme::bold().render(&render::truncate(&group.entity_title, title_width(20))),
+        );
+        if !single_project {
+            println!("      {}", Theme::dim().render(&group.project_path));
+        }
+
+        // Sub-events as indented rows
+        let summary_max = title_width(42);
+        let mut table = Table::new()
+            .columns(3)
+            .indent(6)
+            .align(2, Align::Right)
+            .max_width(1, summary_max);
+
+        for event in &group.events {
+            let badge = activity_badge_label(&event.event_type);
+            let badge_style = activity_badge_style(&event.event_type);
+
+            let actor_prefix = event
+                .actor
+                .as_deref()
+                .map(|a| format!("@{a} "))
+                .unwrap_or_default();
+            let clean_summary = event.summary.replace('\n', " ");
+            let summary_text = format!("{actor_prefix}{clean_summary}");
+
+            let time = render::format_relative_time_compact(event.timestamp);
+
+            table.add_row(vec![
+                StyledCell::styled(badge, badge_style),
+                StyledCell::plain(summary_text),
+                StyledCell::styled(time, Theme::dim()),
+            ]);
+        }
+
+        let rendered = table.render();
+        for (line, event) in rendered.lines().zip(group.events.iter()) {
+            println!("{line}");
+            if let Some(preview) = &event.body_preview
+                && !preview.is_empty()
+            {
+                let truncated = render::truncate(preview, 60);
+                println!(
+                    "        {}",
+                    Theme::dim().render(&format!("\"{truncated}\""))
+                );
+            }
+        }
+    }
+
+    // Footer
+    println!(
+        "\n    {}",
+        Theme::dim().render(&format!(
+            "{} events across {} items",
+            since.total_event_count,
+            since.groups.len()
+        ))
+    );
+}
+
 // ─── Full Dashboard ──────────────────────────────────────────────────────────
 
 /// Render the complete human-mode dashboard.
 pub fn print_me_dashboard(dashboard: &MeDashboard, single_project: bool) {
+    if let Some(ref since) = dashboard.since_last_check {
+        print_since_last_check_section(since, single_project);
+    }
     print_summary_header(&dashboard.summary, &dashboard.username);
     print_issues_section(&dashboard.open_issues, single_project);
     print_authored_mrs_section(&dashboard.open_mrs_authored, single_project);
@@ -495,6 +599,9 @@ pub fn print_me_dashboard_filtered(
     show_mrs: bool,
     show_activity: bool,
 ) {
+    if let Some(ref since) = dashboard.since_last_check {
+        print_since_last_check_section(since, single_project);
+    }
     print_summary_header(&dashboard.summary, &dashboard.username);
 
     if show_issues {