No click-to-select for profiles in sidebar table

[Harry-kp]

Problem

In `src/app/input.rs` lines 197–207, mouse clicks detect which panel was clicked and focus it, but there's no row-level click handling for the profile table. Clicking on a specific profile name doesn't select it — the user must use keyboard navigation (`j`/`k`/arrows) to select individual profiles.

Expected behavior

Left-clicking on a profile row in the sidebar should:

1. Focus the Sidebar panel (already works)
2. Select the clicked profile row

The row can be determined from the click `mouse.row` coordinate relative to the panel area's Y offset, accounting for the border and any header row.

Where in the code

`src/app/input.rs`, `handle_mouse()` — the `MouseEventKind::Down(MouseButton::Left)` branch. After identifying the Sidebar panel click, calculate the profile index from the row offset.

Acceptance criteria

• Clicking a profile row selects it
• Clicking outside the profile rows (e.g., on the border) only focuses the panel
• Selection scrolls into view if needed

[Harry-kp]

Implementation Plan

Root Cause

The sidebar profile list only responds to keyboard navigation (j/k/Up/Down). Mouse clicks on a profile row do nothing. The mouse event handler in src/app/input.rs handles scroll events but not click-to-select.

What to Change

Step 1: In src/app/input.rs → handle_mouse(), add a handler for MouseEventKind::Down(MouseButton::Left):

MouseEventKind::Down(MouseButton::Left) => {
    // Check if click is within the sidebar area
    // Convert mouse.row to a profile index based on sidebar layout
    // Call self.profile_list_state.select(Some(clicked_index))
}

Step 2: You'll need to know the sidebar's screen coordinates. Either:

• Store the sidebar Rect after layout in render() and pass it to App
• Or compute the offset: sidebar starts after the header row, profile list starts at row N within the sidebar block

Step 3: Account for the sidebar border and title row when converting mouse Y to profile index:

let sidebar_y_offset = sidebar_area.y + 1; // +1 for border
let clicked_row = mouse.row.saturating_sub(sidebar_y_offset);
let profile_idx = clicked_row as usize + scroll_offset;

Acceptance Criteria

• Clicking a profile in the sidebar selects it
• Click outside the sidebar does nothing
• Double-click or Enter after click connects (existing keyboard behavior)
• Scroll position is accounted for in the index calculation

Difficulty: Medium (~45 min) — requires understanding the layout coordinate system