fix(sync): Replace text-only progress with animated bars for docs/embed stages

Stages 3 (generate-docs) and 4 (embed) reported progress by appending
"(N/M)" text to the stage spinner message, while stages 1-2 (ingest)
used dedicated indicatif progress bars with animated [====> ] rendering
registered with the global MultiProgress. This visual inconsistency
was introduced when progress callbacks were wired through in 266ed78.

Replace the spinner.set_message() callbacks with proper ProgressBar
instances that match the ingest stage pattern:
- Create a bar-style ProgressBar registered via multi().add()
- Use the same template/progress_chars as the ingest discussion bars
- Lazy-init the tick via AtomicBool to avoid showing the bar before
  the first callback fires (matching how ingest enables ticks only
  at DiscussionSyncStarted)
- Update set_length on every callback for the docs stage, since the
  regenerator's estimated_total can grow if new dirty items are
  queued during processing (using .max() internally)
- Clean up both the sub-bar and stage spinner on completion/error

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

src/cli/commands/sync.rs

@@ -3,6 +3,8 @@
 use console::style;
 use indicatif::{ProgressBar, ProgressStyle};
 use serde::Serialize;
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::Arc;
 use tracing::Instrument;
 use tracing::{info, warn};
 
@@ -160,16 +162,39 @@ pub async fn run_sync(
                 options.robot_mode,
             );
             info!("Sync stage {current_stage}/{total_stages}: generating documents");
-            let docs_spinner = spinner.clone();
+
+            // Create a dedicated progress bar matching the ingest stage style
+            let docs_bar = if options.robot_mode {
+                ProgressBar::hidden()
+            } else {
+                let b = crate::cli::progress::multi().add(ProgressBar::new(0));
+                b.set_style(
+                    ProgressStyle::default_bar()
+                        .template(
+                            "    {spinner:.blue} Processing documents [{bar:30.cyan/dim}] {pos}/{len}",
+                        )
+                        .unwrap()
+                        .progress_chars("=> "),
+                );
+                b
+            };
+            let docs_bar_clone = docs_bar.clone();
+            let tick_started = Arc::new(AtomicBool::new(false));
+            let tick_started_clone = Arc::clone(&tick_started);
             let docs_cb: Box<dyn Fn(usize, usize)> = Box::new(move |processed, total| {
                 if total > 0 {
-                    docs_spinner.set_message(format!(
-                        "Processing documents... ({processed}/{total})"
-                    ));
+                    if !tick_started_clone.swap(true, Ordering::Relaxed) {
+                        docs_bar_clone.enable_steady_tick(std::time::Duration::from_millis(100));
+                    }
+                    // Update length every callback — the regenerator's estimated_total
+                    // can grow if new dirty items are queued during processing.
+                    docs_bar_clone.set_length(total as u64);
+                    docs_bar_clone.set_position(processed as u64);
                 }
             });
             let docs_result = run_generate_docs(config, false, None, Some(docs_cb))?;
             result.documents_regenerated = docs_result.regenerated;
+            docs_bar.finish_and_clear();
             spinner.finish_and_clear();
         } else {
             info!("Sync: skipping document generation (--no-docs)");
@@ -185,19 +210,43 @@ pub async fn run_sync(
                 options.robot_mode,
             );
             info!("Sync stage {current_stage}/{total_stages}: embedding documents");
-            let embed_spinner = spinner.clone();
+
+            // Create a dedicated progress bar matching the ingest stage style
+            let embed_bar = if options.robot_mode {
+                ProgressBar::hidden()
+            } else {
+                let b = crate::cli::progress::multi().add(ProgressBar::new(0));
+                b.set_style(
+                    ProgressStyle::default_bar()
+                        .template(
+                            "    {spinner:.blue} Generating embeddings [{bar:30.cyan/dim}] {pos}/{len}",
+                        )
+                        .unwrap()
+                        .progress_chars("=> "),
+                );
+                b
+            };
+            let embed_bar_clone = embed_bar.clone();
+            let tick_started = Arc::new(AtomicBool::new(false));
+            let tick_started_clone = Arc::clone(&tick_started);
             let embed_cb: Box<dyn Fn(usize, usize)> = Box::new(move |processed, total| {
-                embed_spinner.set_message(format!(
-                    "Embedding documents... ({processed}/{total})"
-                ));
+                if total > 0 {
+                    if !tick_started_clone.swap(true, Ordering::Relaxed) {
+                        embed_bar_clone.enable_steady_tick(std::time::Duration::from_millis(100));
+                    }
+                    embed_bar_clone.set_length(total as u64);
+                    embed_bar_clone.set_position(processed as u64);
+                }
             });
             match run_embed(config, options.full, false, Some(embed_cb)).await {
                 Ok(embed_result) => {
                     result.documents_embedded = embed_result.embedded;
+                    embed_bar.finish_and_clear();
                     spinner.finish_and_clear();
                 }
                 Err(e) => {
                     // Graceful degradation: Ollama down is a warning, not an error
+                    embed_bar.finish_and_clear();
                     spinner.finish_and_clear();
                     if !options.robot_mode {
                         eprintln!("  {} Embedding skipped ({})", style("warn").yellow(), e);