Chore: remove unused imports and suppress unused variable warnings

Removes dead use statements across dispatch, formula, import, model, and
UI modules. Prefixes intentionally unused variables with _ in app.rs,
analyzer.rs, and grid.rs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/command/dispatch.rs

@@ -1,4 +1,3 @@
-use anyhow::Result;
 
 use crate::model::Model;
 use crate::model::cell::{CellKey, CellValue};

src/formula/mod.rs

@@ -1,5 +1,5 @@
 pub mod parser;
 pub mod ast;
 
-pub use ast::{AggFunc, Expr, Filter, Formula};
+pub use ast::{AggFunc, Expr, Formula};
 pub use parser::parse_formula;

src/import/analyzer.rs

@@ -75,7 +75,7 @@ pub fn analyze_records(records: &[Value]) -> Vec<FieldProposal> {
                 .collect();
             let distinct_vec: Vec<String> = distinct.into_iter().map(String::from).collect();
             let n = distinct_vec.len();
-            let total = values.len();
+            let _total = values.len();
 
             // Check if looks like date
             let looks_like_date = distinct_vec.iter().any(|s| {

src/import/mod.rs

@@ -1,5 +1,3 @@
 pub mod wizard;
 pub mod analyzer;
 
-pub use wizard::{ImportWizard, ImportPipeline, WizardStep};
-pub use analyzer::{FieldKind, FieldProposal, analyze_records};

src/main.rs

@@ -12,7 +12,7 @@ use std::time::Duration;
 
 use anyhow::{Context, Result};
 use crossterm::{
-    event::{self, Event, KeyCode, KeyModifiers},
+    event::{self, Event},
     execute,
     terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
 };

src/model/mod.rs

@@ -2,6 +2,5 @@ pub mod category;
 pub mod cell;
 pub mod model;
 
-pub use category::{Category, CategoryId, Group, Item, ItemId};
+pub use cell::CellKey;
-pub use cell::{CellKey, CellValue, DataStore};
 pub use model::Model;

src/model/model.rs

@@ -1,4 +1,3 @@
-use std::collections::HashMap;
 use indexmap::IndexMap;
 use serde::{Deserialize, Serialize};
 use anyhow::{anyhow, Result};

src/ui/app.rs

@@ -5,7 +5,6 @@ use crossterm::event::{KeyCode, KeyEvent, KeyModifiers};
 
 use crate::model::Model;
 use crate::model::cell::{CellKey, CellValue};
-use crate::formula::parse_formula;
 use crate::import::wizard::{ImportWizard, WizardStep};
 use crate::persistence;
 use crate::view::Axis;
@@ -929,7 +928,7 @@ impl App {
     }
 
     fn jump_to_last_row(&mut self) {
-        let view_name = self.model.active_view.clone();
+        let _view_name = self.model.active_view.clone();
         if let Some(view) = self.model.active_view() {
             let row_cats: Vec<String> = view.categories_on(Axis::Row).into_iter().map(String::from).collect();
             let count = row_cats.first()
@@ -944,7 +943,7 @@ impl App {
     }
 
     fn jump_to_last_col(&mut self) {
-        let view_name = self.model.active_view.clone();
+        let _view_name = self.model.active_view.clone();
         if let Some(view) = self.model.active_view() {
             let col_cats: Vec<String> = view.categories_on(Axis::Column).into_iter().map(String::from).collect();
             let count = col_cats.first()

src/ui/grid.rs

@@ -2,7 +2,6 @@ use ratatui::{
     buffer::Buffer,
     layout::Rect,
     style::{Color, Modifier, Style},
-    text::{Line, Span},
     widgets::{Block, Borders, Widget},
 };
 use unicode_width::UnicodeWidthStr;
@@ -181,7 +180,7 @@ impl<'a> GridWidget<'a> {
                     Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD));
 
                 let mut x = area.x + ROW_HEADER_WIDTH;
-                for (ci, col_item) in visible_col_items.iter().enumerate() {
+                for (_ci, col_item) in visible_col_items.iter().enumerate() {
                     if x >= area.x + area.width { break; }
                     let mut coords = page_coords.clone();
                     for (cat, item) in col_cats.iter().zip(col_item.iter()) {

src/ui/mod.rs

@@ -7,4 +7,3 @@ pub mod tile_bar;
 pub mod import_wizard_ui;
 pub mod help;
 
-pub use app::{App, AppMode};