feat: add function completion, apply delay, and VimLeavePre cleanup

Major improvements to the event-driven prompt processing system:

Function Completion:
- Override intent to "complete" when prompt is inside function/method scope
- Use Tree-sitter to detect enclosing scope and replace entire function
- Special LLM prompt instructs to complete function body without duplicating
- Patch apply uses "replace" strategy for scope range instead of appending

Apply Delay:
- Add `apply_delay_ms` config option (default 5000ms) for code review time
- Log "Code ready. Applying in X seconds..." before applying patches
- Configurable wait time before removing tags and injecting code

VimLeavePre Cleanup:
- Logs panel and queue windows close automatically on Neovim exit
- Context modal closes on VimLeavePre
- Scheduler stops timer and cleans up augroup on exit
- Handle QuitPre for :qa, :wqa commands
- Force close with buffer deletion for robust cleanup

Response Cleaning:
- Remove LLM special tokens (deepseek, llama markers)
- Add blank line spacing before appended code
- Log full raw LLM response in logs panel for debugging

Documentation:
- Add required dependencies (plenary.nvim, nvim-treesitter)
- Add optional dependencies (nvim-treesitter-textobjects, nui.nvim)
- Document all intent types including "complete"
- Add Logs Panel section with features and keymaps
- Update lazy.nvim example with dependencies

Tests:
- Add tests for patch create_from_event with different strategies
- Fix assert.is_true to assert.is_truthy for string.match

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

lua/codetyper/autocmds.lua

@@ -332,10 +332,7 @@ function M.check_for_closed_prompt()
 					-- Clean prompt content (strip file references)
 					local cleaned = parser.clean_prompt(parser.strip_file_references(prompt.content))
 
-					-- Detect intent from prompt
-					local intent = intent_mod.detect(cleaned)
-
-					-- Resolve scope in target file (use prompt position to find enclosing scope)
+					-- Resolve scope in target file FIRST (need it to adjust intent)
 					local target_bufnr = vim.fn.bufnr(target_path)
 					if target_bufnr == -1 then
 						target_bufnr = bufnr
@@ -354,6 +351,24 @@ function M.check_for_closed_prompt()
 						}
 					end
 
+					-- Detect intent from prompt
+					local intent = intent_mod.detect(cleaned)
+
+					-- IMPORTANT: If prompt is inside a function/method and intent is "add",
+					-- override to "complete" since we're completing the function body
+					if scope and (scope.type == "function" or scope.type == "method") then
+						if intent.type == "add" or intent.action == "insert" or intent.action == "append" then
+							-- Override to complete the function instead of adding new code
+							intent = {
+								type = "complete",
+								scope_hint = "function",
+								confidence = intent.confidence,
+								action = "replace",
+								keywords = intent.keywords,
+							}
+						end
+					end
+
 					-- Determine priority based on intent
 					local priority = 2 -- Normal
 					if intent.type == "fix" or intent.type == "complete" then
@@ -472,10 +487,7 @@ function M.check_all_prompts()
 				-- Clean prompt content (strip file references)
 				local cleaned = parser.clean_prompt(parser.strip_file_references(prompt.content))
 
-				-- Detect intent from prompt
-				local intent = intent_mod.detect(cleaned)
-
-				-- Resolve scope in target file
+				-- Resolve scope in target file FIRST (need it to adjust intent)
 				local target_bufnr = vim.fn.bufnr(target_path)
 				if target_bufnr == -1 then
 					target_bufnr = bufnr -- Use current buffer if target not loaded
@@ -494,6 +506,24 @@ function M.check_all_prompts()
 					}
 				end
 
+				-- Detect intent from prompt
+				local intent = intent_mod.detect(cleaned)
+
+				-- IMPORTANT: If prompt is inside a function/method and intent is "add",
+				-- override to "complete" since we're completing the function body
+				if scope and (scope.type == "function" or scope.type == "method") then
+					if intent.type == "add" or intent.action == "insert" or intent.action == "append" then
+						-- Override to complete the function instead of adding new code
+						intent = {
+							type = "complete",
+							scope_hint = "function",
+							confidence = intent.confidence,
+							action = "replace",
+							keywords = intent.keywords,
+						}
+					end
+				end
+
 				-- Determine priority based on intent
 				local priority = 2
 				if intent.type == "fix" or intent.type == "complete" then