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>

tests/spec/patch_spec.lua

@@ -16,7 +16,7 @@ describe("patch", function()
 			local id2 = patch.generate_id()
 
 			assert.is_not.equals(id1, id2)
-			assert.is_true(id1:match("^patch_"))
+			assert.is_truthy(id1:match("^patch_"))
 		end)
 	end)
 
@@ -302,4 +302,70 @@ describe("patch", function()
 			assert.equals(1, #patch.get_pending())
 		end)
 	end)
+
+	describe("create_from_event", function()
+		it("should create patch with replace strategy for complete intent", function()
+			local event = {
+				id = "evt_123",
+				target_path = "/tmp/test.lua",
+				bufnr = 1,
+				range = { start_line = 5, end_line = 10 },
+				scope_range = { start_line = 3, end_line = 12 },
+				scope = { type = "function", name = "test_fn" },
+				intent = {
+					type = "complete",
+					action = "replace",
+					confidence = 0.9,
+					keywords = {},
+				},
+			}
+
+			local p = patch.create_from_event(event, "function code", 0.9)
+
+			assert.equals("replace", p.injection_strategy)
+			assert.is_truthy(p.injection_range)
+			assert.equals(3, p.injection_range.start_line)
+			assert.equals(12, p.injection_range.end_line)
+		end)
+
+		it("should create patch with append strategy for add intent", function()
+			local event = {
+				id = "evt_456",
+				target_path = "/tmp/test.lua",
+				bufnr = 1,
+				range = { start_line = 5, end_line = 10 },
+				intent = {
+					type = "add",
+					action = "append",
+					confidence = 0.8,
+					keywords = {},
+				},
+			}
+
+			local p = patch.create_from_event(event, "new function", 0.8)
+
+			assert.equals("append", p.injection_strategy)
+		end)
+
+		it("should create patch with insert strategy for insert action", function()
+			local event = {
+				id = "evt_789",
+				target_path = "/tmp/test.lua",
+				bufnr = 1,
+				range = { start_line = 5, end_line = 10 },
+				intent = {
+					type = "add",
+					action = "insert",
+					confidence = 0.8,
+					keywords = {},
+				},
+			}
+
+			local p = patch.create_from_event(event, "inserted code", 0.8)
+
+			assert.equals("insert", p.injection_strategy)
+			assert.is_truthy(p.injection_range)
+			assert.equals(5, p.injection_range.start_line)
+		end)
+	end)
 end)