feat: include commit history in viz export

- Add VizCommit struct to viz module for serializing commits
- Include commits array in VizExport (default empty, skip if empty)
- Update push --viz to populate commits from db.log()
- Update export --format viz-json to include commits
- Export VizCommit from lib.rs

Author: moonstripe

src/lib.rs

@@ -46,7 +46,7 @@ pub use remote::{Remote, RemoteConfig, SyncClient, SyncConfig, SyncState, PullRe
 pub use remote::refresh_access_token;
 pub use search::SearchResult;
 pub use store::ObjectStore;
-pub use viz::{VizExport, VizMeta, VizThought};
+pub use viz::{VizCommit, VizExport, VizMeta, VizThought};
 
 #[cfg(feature = "viz")]
 pub use viz::project_to_3d;

src/main.rs

@@ -882,7 +882,20 @@ fn main() -> anyhow::Result<()> {
             #[cfg(feature = "viz")]
             let viz_export = if viz {
                 let thoughts = db.list_thoughts()?;
-                Some(indra_db::project_to_3d(&thoughts)?)
+                let commits = db.log(None)?;
+                let mut export = indra_db::project_to_3d(&thoughts)?;
+                // Add commit history to viz export
+                export.commits = commits
+                    .into_iter()
+                    .map(|(hash, commit)| indra_db::VizCommit {
+                        hash: hash.to_hex(),
+                        message: commit.message,
+                        author: commit.author,
+                        timestamp: commit.timestamp,
+                        parents: commit.parents.into_iter().map(|p| p.to_hex()).collect(),
+                    })
+                    .collect();
+                Some(export)
             } else {
                 None
             };
@@ -1664,7 +1677,20 @@ fn main() -> anyhow::Result<()> {
                         )?;
 
                         let thoughts = db.list_thoughts()?;
-                        let viz_export = indra_db::project_to_3d(&thoughts)?;
+                        let commits = db.log(None)?;
+                        let mut viz_export = indra_db::project_to_3d(&thoughts)?;
+
+                        // Add commit history
+                        viz_export.commits = commits
+                            .into_iter()
+                            .map(|(hash, commit)| indra_db::VizCommit {
+                                hash: hash.to_hex(),
+                                message: commit.message,
+                                author: commit.author,
+                                timestamp: commit.timestamp,
+                                parents: commit.parents.into_iter().map(|p| p.to_hex()).collect(),
+                            })
+                            .collect();
 
                         let json = serde_json::to_string_pretty(&viz_export)?;
 
@@ -1677,7 +1703,8 @@ fn main() -> anyhow::Result<()> {
                                     "message": format!("Exported to {}", path.display()),
                                     "thoughts": viz_export.meta.total_thoughts,
                                     "embedded": viz_export.meta.embedded_thoughts,
-                                    "method": viz_export.meta.reduction_method
+                                    "method": viz_export.meta.reduction_method,
+                                    "commits": viz_export.commits.len()
                                 }),
                             );
                         } else {

src/viz/mod.rs

@@ -29,11 +29,29 @@ pub struct VizThought {
     pub created_at: u64,
 }
 
+/// A commit in visualization export format
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct VizCommit {
+    /// The commit hash
+    pub hash: String,
+    /// Commit message
+    pub message: String,
+    /// Author identifier
+    pub author: String,
+    /// Timestamp (unix millis)
+    pub timestamp: u64,
+    /// Parent commit hashes
+    pub parents: Vec<String>,
+}
+
 /// Export format for visualization data
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct VizExport {
     /// The thoughts with 3D positions
     pub thoughts: Vec<VizThought>,
+    /// Commit history (newest first)
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub commits: Vec<VizCommit>,
     /// Metadata about the export
     pub meta: VizMeta,
 }

src/viz/pca.rs

@@ -1,7 +1,7 @@
 //! PCA-based dimensionality reduction for visualization
 
-use crate::model::Thought;
-use crate::viz::{VizExport, VizMeta, VizThought};
+use crate::model::{Commit, Thought};
+use crate::viz::{VizCommit, VizExport, VizMeta, VizThought};
 use crate::Result;
 
 use linfa::traits::{Fit, Transformer};
@@ -31,6 +31,7 @@ pub fn project_to_3d(thoughts: &[Thought]) -> Result<VizExport> {
 
         return Ok(VizExport {
             thoughts: viz_thoughts,
+            commits: vec![],
             meta: VizMeta {
                 total_thoughts: thoughts.len(),
                 embedded_thoughts: 0,
@@ -82,6 +83,7 @@ pub fn project_to_3d(thoughts: &[Thought]) -> Result<VizExport> {
 
         return Ok(VizExport {
             thoughts: viz_thoughts,
+            commits: vec![],
             meta: VizMeta {
                 total_thoughts: thoughts.len(),
                 embedded_thoughts: embedded.len(),
@@ -196,6 +198,7 @@ pub fn project_to_3d(thoughts: &[Thought]) -> Result<VizExport> {
 
     Ok(VizExport {
         thoughts: viz_thoughts,
+        commits: vec![],
         meta: VizMeta {
             total_thoughts: thoughts.len(),
             embedded_thoughts: embedded.len(),