feat(environment): refactor environment editor into workspace tab view

[bajrangCoder]

Summary of Changes

This PR declutters the Environment sidebar panel by extracting the environment variable editor into a dedicated workspace tab (EnvironmentView), and refactors the tab state architecture to easily support future custom tab types

🚀 Key Improvements

1. Extensible Tab Architecture (TabState):

   • Refactored TabState to use a tagged TabContent enum (TabContent::Request and TabContent::Environment).
   • Added generic icon support (TabIcon) to TabBar for custom tab types.

2. Sidebar Decluttering (EnvironmentPanel):

   • Removed the inline variable editor and stacked border cards from the narrow sidebar panel.
   • Selecting an environment now opens or switches to its dedicated environment tab in the workspace.

3. Key-Value Variable Table (EnvironmentView):

   • Built a full EnvironmentView component matching the clean key-value table design of HeaderEditor / ParamsEditor.
   • Supports key/value inputs, secret masking toggle, duplicate key detection, and single/all variable deletion.
   • Added rich centered empty states for empty environments and search filter misses.

4. Unified 1-Line Header Bar:

   • Replaced stacked header bars with a single compact horizontal toolbar (40px).
   • Features color indicator dot, environment title, scope metadata (Workspace base, Global, etc.), active badge toggle, integrated search box with search icon, color picker swatch, and an actions menu.

[Copilot]

Pull request overview

This PR refactors the UI so environment editing moves out of the sidebar into a dedicated workspace tab (EnvironmentView), while evolving the workspace tab model to support multiple tab content types (request vs environment) with custom icons.

Changes:

• Introduces TabContent (request/environment) and updates tab rendering to support non-request workspace tabs with TabIcon.
• Adds a new EnvironmentView workspace tab implementing a key/value variables table with search, secret masking, and bulk actions.
• Simplifies EnvironmentPanel to a navigator-only sidebar that opens the selected environment in the workspace.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/views/mod.rs	Registers the new environment_view module.
src/views/main_view.rs	Refactors tab state to TabContent, adds environment-tab open/switch logic, and updates workspace rendering for new tab types.
src/views/environment_view.rs	Adds the new environment editor view (table UI, filtering, secret toggles, delete/clear actions).
src/entities/environment.rs	Adds clear_variables to support bulk deletion from EnvironmentView.
src/components/tab_bar.rs	Generalizes tab icon rendering via TabIcon and updates tab UI accordingly.
src/components/environment_panel.rs	Removes inline variable editor and routes environment selection to open an environment workspace tab.

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.