refactor: remove line-deletion capability (already implemented)

Line deletion via Delete tool already exists in current implementation.
Focus on three new capabilities: label-management, docker-deployment, hacker-theme

openspec/changes/enhance-annotation-features-and-deployment/.openspec.yaml

@@ -0,0 +1,2 @@
+schema: spec-driven
+created: 2026-02-12

openspec/changes/enhance-annotation-features-and-deployment/proposal.md

@@ -4,10 +4,6 @@ The candle annotator currently has basic line drawing functionality (Phase 1-4 c
 
 ## What Changes
 
-### Line Management Enhancements
-- **Delete Selected Line**: Add ability to delete the currently selected line using keyboard shortcut (Delete/Backspace key)
-- **Delete All Lines**: Add button in Toolbox to clear all line annotations at once with confirmation dialog
-
 ### Label Management System
 - **Delete All Labels**: Add button to remove all break_up/break_down markers with confirmation
 - **Select Label**: Make label markers (arrows) clickable to select/highlight them
@@ -43,7 +39,6 @@ The candle annotator currently has basic line drawing functionality (Phase 1-4 c
 ## Capabilities
 
 ### New Capabilities
-- `line-deletion`: Delete selected line or all lines at once
 - `label-management`: Complete CRUD interface for label annotations in sidebar
 - `docker-deployment`: Containerized deployment with docker-compose
 - `hacker-theme`: Terminal-inspired minimal dark theme with neon accents
@@ -56,7 +51,6 @@ The candle annotator currently has basic line drawing functionality (Phase 1-4 c
 ### Code Changes
 - **Database**: No schema changes needed (existing tables support all operations)
 - **Components**:
-  - `SvgOverlay.tsx`: Add keyboard delete handlers, bulk delete logic
   - `Toolbox.tsx`: Add label list UI, delete buttons, collapsible sections, theme styling
   - `CandleChart.tsx`: Add label selection click handlers, highlight logic
   - `page.tsx`: Add state for selected label, pass callbacks

openspec/changes/enhance-annotation-features-and-deployment/specs/line-deletion/spec.md

@@ -1,69 +0,0 @@
-## ADDED Requirements
-
-### Requirement: Delete selected line with keyboard
-The system SHALL allow users to delete the currently selected line annotation using keyboard shortcuts (Delete key or Backspace key).
-
-#### Scenario: Delete selected line with Delete key
-- **WHEN** a line is selected (selectedLineId is set) and user presses Delete key
-- **THEN** system sends DELETE request to `/api/annotations/{id}`, removes line from display, clears selection state, and triggers annotation refresh
-
-#### Scenario: Delete selected line with Backspace key
-- **WHEN** a line is selected and user presses Backspace key
-- **THEN** system sends DELETE request to `/api/annotations/{id}`, removes line from display, clears selection state, and triggers annotation refresh
-
-#### Scenario: No line selected when pressing delete
-- **WHEN** no line is selected (selectedLineId is null) and user presses Delete or Backspace key
-- **THEN** system takes no action and does not make any API calls
-
-#### Scenario: Delete key during line drawing
-- **WHEN** user is actively drawing a line (drawingLine state is not null) and presses Delete key
-- **THEN** system cancels the line drawing operation but does NOT delete any existing lines
-
-### Requirement: Delete all lines with confirmation
-The system SHALL provide a UI button in the Toolbox to delete all line annotations at once with user confirmation.
-
-#### Scenario: User clicks Delete All Lines button
-- **WHEN** user clicks "Delete All Lines" button in Toolbox
-- **THEN** system displays a confirmation dialog with message "Delete all line annotations? This cannot be undone." and Cancel/Confirm buttons
-
-#### Scenario: User confirms delete all lines
-- **WHEN** confirmation dialog is open and user clicks Confirm button
-- **THEN** system sends DELETE request to `/api/annotations?type=line`, removes all lines from display, clears selection state, triggers annotation refresh, and closes dialog
-
-#### Scenario: User cancels delete all lines
-- **WHEN** confirmation dialog is open and user clicks Cancel button
-- **THEN** system closes dialog without making any API calls or removing any lines
-
-#### Scenario: No lines exist when clicking delete all
-- **WHEN** user clicks "Delete All Lines" button and no line annotations exist in database
-- **THEN** system still shows confirmation dialog (user confirms/cancels normally)
-
-### Requirement: API support for bulk line deletion
-The API SHALL support deleting multiple annotations by type via query parameters.
-
-#### Scenario: Delete all lines via API
-- **WHEN** DELETE request sent to `/api/annotations?type=line`
-- **THEN** system deletes all annotations where label_type equals 'line' and returns `{ success: true, deleted: <count> }`
-
-#### Scenario: Delete all annotations via API
-- **WHEN** DELETE request sent to `/api/annotations?all=true`
-- **THEN** system deletes all annotations regardless of type and returns `{ success: true, deleted: <count> }`
-
-#### Scenario: Invalid type parameter
-- **WHEN** DELETE request sent to `/api/annotations?type=invalid_type`
-- **THEN** system returns 400 error with message "Invalid annotation type"
-
-### Requirement: Delete button in Toolbox
-The Toolbox SHALL display a "Delete All Lines" button when line annotations exist.
-
-#### Scenario: Lines exist in database
-- **WHEN** one or more line annotations exist in the database
-- **THEN** Toolbox displays "Delete All Lines" button in destructive styling (red theme)
-
-#### Scenario: No lines exist
-- **WHEN** no line annotations exist in database
-- **THEN** Toolbox displays "Delete All Lines" button in disabled state with reduced opacity
-
-#### Scenario: Button position in Toolbox
-- **WHEN** Toolbox renders
-- **THEN** "Delete All Lines" button appears below the color picker section and above the "Delete" tool button