add plugin highlight groups to colourscheme

lua/paper-tonic-modern/groups/lsp.lua

@@ -1,12 +1,80 @@
 -- Paper Tonic Modern - LSP Highlight Groups
--- LSP diagnostics and UI elements
+-- LSP diagnostics, references, and UI elements
 
-local colors = require('paper-tonic-modern.colors')
+local c = require('paper-tonic-modern.colors')
 
 return {
-  -- LSP groups (to be implemented in Phase 11.8)
-  DiagnosticError = { fg = colors.alert_strong },
-  DiagnosticWarn = { fg = colors.alert },
-  DiagnosticInfo = { fg = colors.question },
-  DiagnosticHint = { fg = colors.fg },
+  -- ============================================================================
+  -- LSP Diagnostics
+  -- ============================================================================
+  
+  -- Error diagnostics (red)
+  DiagnosticError = { fg = c.alert_strong },  -- Bright red #d70000
+  DiagnosticUnderlineError = { sp = c.alert_strong, undercurl = true },
+  DiagnosticSignError = { fg = c.alert_strong, bg = c.bg },
+  DiagnosticFloatingError = { fg = c.alert_strong },
+  DiagnosticVirtualTextError = { fg = c.alert_strong, bg = c.bg_error_weak },
+  
+  -- Warning diagnostics (orange)
+  DiagnosticWarn = { fg = c.alert },  -- Orange-red #d75f00
+  DiagnosticUnderlineWarn = { sp = c.alert, undercurl = true },
+  DiagnosticSignWarn = { fg = c.alert, bg = c.bg },
+  DiagnosticFloatingWarn = { fg = c.alert },
+  DiagnosticVirtualTextWarn = { fg = c.alert, bg = c.bg_fail },
+  
+  -- Info diagnostics (blue)
+  DiagnosticInfo = { fg = c.modified },  -- Blue #8989af
+  DiagnosticUnderlineInfo = { sp = c.modified, underline = true },
+  DiagnosticSignInfo = { fg = c.modified, bg = c.bg },
+  DiagnosticFloatingInfo = { fg = c.modified },
+  DiagnosticVirtualTextInfo = { fg = c.modified, bg = c.bg_modified },
+  
+  -- Hint diagnostics (green)
+  DiagnosticHint = { fg = c.success },  -- Green #89af89
+  DiagnosticUnderlineHint = { sp = c.success, underline = true },
+  DiagnosticSignHint = { fg = c.success, bg = c.bg },
+  DiagnosticFloatingHint = { fg = c.success },
+  DiagnosticVirtualTextHint = { fg = c.success, bg = c.bg_success },
+  
+  -- ============================================================================
+  -- LSP References (document highlight)
+  -- ============================================================================
+  
+  -- Text under cursor (current symbol)
+  LspReferenceText = { bg = c.bg_hl_special_weak },  -- Subtle cyan #e0eaff
+  
+  -- Read references (where symbol is read)
+  LspReferenceRead = { bg = c.bg_hl_special },  -- Cyan #d4f0ff
+  
+  -- Write references (where symbol is written/modified)
+  LspReferenceWrite = { bg = c.bg_hl_special_strong },  -- Strong cyan #a3e0ff
+  
+  -- ============================================================================
+  -- LSP Signature Help
+  -- ============================================================================
+  
+  LspSignatureActiveParameter = { fg = c.primary_strong, bold = true },
+  
+  -- ============================================================================
+  -- LSP Semantic Tokens (fallback groups)
+  -- ============================================================================
+  
+  -- These are fallback groups for LSP semantic tokens
+  -- TreeSitter groups take precedence when both are available
+  ['@lsp.type.class'] = '@type',
+  ['@lsp.type.decorator'] = '@function',
+  ['@lsp.type.enum'] = '@type',
+  ['@lsp.type.enumMember'] = '@constant',
+  ['@lsp.type.function'] = '@function',
+  ['@lsp.type.interface'] = '@type',
+  ['@lsp.type.macro'] = '@macro',
+  ['@lsp.type.method'] = '@function.method',
+  ['@lsp.type.namespace'] = '@module',
+  ['@lsp.type.parameter'] = '@variable.parameter',
+  ['@lsp.type.property'] = '@property',
+  ['@lsp.type.struct'] = '@type',
+  ['@lsp.type.type'] = '@type',
+  ['@lsp.type.typeParameter'] = '@type',
+  ['@lsp.type.variable'] = '@variable',
 }
+