cli: move helpers to cli modules, main.rs under 1100 lines

Move CLI-specific helpers to their cli/ modules:
- journal_tail_entries, journal_tail_digests, extract_title,
  find_current_transcript → cli/journal.rs
- get_group_content → cli/misc.rs
- cmd_journal_write, cmd_journal_tail, cmd_load_context follow

These are presentation/session helpers, not library code — they
belong in the CLI layer per Kent's guidance.

main.rs: 3130 → 1054 lines (66% reduction).

Co-Authored-By: Kent Overstreet <kent.overstreet@linux.dev>

poc-memory/src/cli/misc.rs

@@ -208,3 +208,103 @@ pub fn cmd_query(expr: &[String]) -> Result<(), String> {
     crate::query_parser::run_query(&store, &graph, &query_str)
 }
 
+fn get_group_content(group: &crate::config::ContextGroup, store: &crate::store::Store, cfg: &crate::config::Config) -> Vec<(String, String)> {
+    match group.source {
+        crate::config::ContextSource::Journal => {
+            let mut entries = Vec::new();
+            let now = crate::store::now_epoch();
+            let window: i64 = cfg.journal_days as i64 * 24 * 3600;
+            let cutoff = now - window;
+            let key_date_re = regex::Regex::new(r"j-(\d{4}-\d{2}-\d{2})").unwrap();
+
+            let journal_ts = |n: &crate::store::Node| -> i64 {
+                if n.created_at > 0 { return n.created_at; }
+                if let Some(caps) = key_date_re.captures(&n.key) {
+                    use chrono::{NaiveDate, TimeZone, Local};
+                    if let Ok(d) = NaiveDate::parse_from_str(&caps[1], "%Y-%m-%d") {
+                        if let Some(dt) = Local.from_local_datetime(&d.and_hms_opt(0, 0, 0).unwrap()).earliest() {
+                            return dt.timestamp();
+                        }
+                    }
+                }
+                n.timestamp
+            };
+
+            let mut journal_nodes: Vec<_> = store.nodes.values()
+                .filter(|n| n.node_type == crate::store::NodeType::EpisodicSession && journal_ts(n) >= cutoff)
+                .collect();
+            journal_nodes.sort_by_key(|n| journal_ts(n));
+
+            let max = cfg.journal_max;
+            let skip = journal_nodes.len().saturating_sub(max);
+            for node in journal_nodes.iter().skip(skip) {
+                entries.push((node.key.clone(), node.content.clone()));
+            }
+            entries
+        }
+        crate::config::ContextSource::File => {
+            group.keys.iter().filter_map(|key| {
+                let content = std::fs::read_to_string(cfg.data_dir.join(key)).ok()?;
+                if content.trim().is_empty() { return None; }
+                Some((key.clone(), content.trim().to_string()))
+            }).collect()
+        }
+        crate::config::ContextSource::Store => {
+            group.keys.iter().filter_map(|key| {
+                let content = store.render_file(key)?;
+                if content.trim().is_empty() { return None; }
+                Some((key.clone(), content.trim().to_string()))
+            }).collect()
+        }
+    }
+}
+
+pub fn cmd_load_context(stats: bool) -> Result<(), String> {
+    let cfg = crate::config::get();
+    let store = crate::store::Store::load()?;
+
+    if stats {
+        let mut total_words = 0;
+        let mut total_entries = 0;
+        println!("{:<25} {:>6} {:>8}", "GROUP", "ITEMS", "WORDS");
+        println!("{}", "-".repeat(42));
+
+        for group in &cfg.context_groups {
+            let entries = get_group_content(group, &store, cfg);
+            let words: usize = entries.iter()
+                .map(|(_, c)| c.split_whitespace().count())
+                .sum();
+            let count = entries.len();
+            println!("{:<25} {:>6} {:>8}", group.label, count, words);
+            total_words += words;
+            total_entries += count;
+        }
+
+        println!("{}", "-".repeat(42));
+        println!("{:<25} {:>6} {:>8}", "TOTAL", total_entries, total_words);
+        return Ok(());
+    }
+
+    println!("=== MEMORY SYSTEM ({}) ===", cfg.assistant_name);
+    println!();
+
+    for group in &cfg.context_groups {
+        let entries = get_group_content(group, &store, cfg);
+        if !entries.is_empty() && group.source == crate::config::ContextSource::Journal {
+            println!("--- recent journal entries ({}/{}) ---",
+                entries.len(), cfg.journal_max);
+        }
+        for (key, content) in entries {
+            if group.source == crate::config::ContextSource::Journal {
+                println!("## {}", key);
+            } else {
+                println!("--- {} ({}) ---", key, group.label);
+            }
+            println!("{}\n", content);
+        }
+    }
+
+    println!("=== END MEMORY LOAD ===");
+    Ok(())
+}
+