diff --git a/tools/server/webui/src/lib/clients/agentic.client.ts b/tools/server/webui/src/lib/clients/agentic.client.ts
index e94f396e39..0f8db8818a 100644
--- a/tools/server/webui/src/lib/clients/agentic.client.ts
+++ b/tools/server/webui/src/lib/clients/agentic.client.ts
@@ -27,7 +27,15 @@ import { mcpClient } from '$lib/clients';
 import { ChatService } from '$lib/services';
 import { config } from '$lib/stores/settings.svelte';
 import { agenticStore } from '$lib/stores/agentic.svelte';
-import type { AgenticMessage, AgenticToolCallList, AgenticConfig } from '$lib/types/agentic';
+import type {
+	AgenticMessage,
+	AgenticToolCallList,
+	AgenticConfig,
+	AgenticFlowCallbacks,
+	AgenticFlowOptions,
+	AgenticFlowParams,
+	AgenticFlowResult
+} from '$lib/types/agentic';
 import type {
 	ApiChatCompletionToolCall,
 	ApiChatMessageData,
@@ -44,8 +52,7 @@ import type { MCPToolCall } from '$lib/types';
 import type {
 	DatabaseMessage,
 	DatabaseMessageExtra,
-	DatabaseMessageExtraImageFile,
-	McpServerOverride
+	DatabaseMessageExtraImageFile
 } from '$lib/types/database';
 import { AttachmentType, MessageRole } from '$lib/enums';
 
@@ -88,46 +95,6 @@ function toAgenticMessages(messages: ApiChatMessageData[]): AgenticMessage[] {
 	});
 }
 
-export interface AgenticFlowCallbacks {
-	onChunk?: (chunk: string) => void;
-	onReasoningChunk?: (chunk: string) => void;
-	onToolCallChunk?: (serializedToolCalls: string) => void;
-	onAttachments?: (extras: DatabaseMessageExtra[]) => void;
-	onModel?: (model: string) => void;
-	onComplete?: (
-		content: string,
-		reasoningContent?: string,
-		timings?: ChatMessageTimings,
-		toolCalls?: string
-	) => void;
-	onError?: (error: Error) => void;
-	onTimings?: (timings?: ChatMessageTimings, promptProgress?: ChatMessagePromptProgress) => void;
-}
-
-export interface AgenticFlowOptions {
-	stream?: boolean;
-	model?: string;
-	temperature?: number;
-	max_tokens?: number;
-	[key: string]: unknown;
-}
-
-export interface AgenticFlowParams {
-	/** Conversation ID for per-conversation state tracking */
-	conversationId: string;
-	messages: (ApiChatMessageData | (DatabaseMessage & { extra?: DatabaseMessageExtra[] }))[];
-	options?: AgenticFlowOptions;
-	callbacks: AgenticFlowCallbacks;
-	signal?: AbortSignal;
-	/** Per-chat MCP server overrides */
-	perChatOverrides?: McpServerOverride[];
-}
-
-export interface AgenticFlowResult {
-	handled: boolean;
-	error?: Error;
-}
-
 interface AgenticStoreStateCallbacks {
 	setRunning: (conversationId: string, running: boolean) => void;
 	setCurrentTurn: (conversationId: string, turn: number) => void;
diff --git a/tools/server/webui/src/lib/clients/chat.client.ts b/tools/server/webui/src/lib/clients/chat.client.ts
index 15097e130b..09e8ee7663 100644
--- a/tools/server/webui/src/lib/clients/chat.client.ts
+++ b/tools/server/webui/src/lib/clients/chat.client.ts
@@ -18,57 +18,16 @@ import { agenticStore } from '$lib/stores/agentic.svelte';
 import { DEFAULT_CONTEXT } from '$lib/constants/default-context';
 import { SYSTEM_MESSAGE_PLACEHOLDER } from '$lib/constants/ui';
 import { REASONING_TAGS } from '$lib/constants/agentic';
-import type { ChatMessageTimings, ChatMessagePromptProgress } from '$lib/types/chat';
+import type {
+	ChatMessageTimings,
+	ChatMessagePromptProgress,
+	ChatStreamCallbacks,
+	ErrorDialogState
+} from '$lib/types/chat';
 import type { DatabaseMessage, DatabaseMessageExtra } from '$lib/types/database';
+import type { ApiProcessingState } from '$lib/types/api';
 import { MessageRole, MessageType } from '$lib/enums';
 
-export interface ApiProcessingState {
-	status: 'idle' | 'preparing' | 'generating';
-	tokensDecoded: number;
-	tokensRemaining: number;
-	contextUsed: number;
-	contextTotal: number;
-	outputTokensUsed: number;
-	outputTokensMax: number;
-	hasNextToken: boolean;
-	tokensPerSecond: number;
-	temperature: number;
-	topP: number;
-	speculative: boolean;
-	progressPercent?: number;
-	promptProgress?: {
-		total: number;
-		cache: number;
-		processed: number;
-		time_ms: number;
-	};
-	promptTokens: number;
-	promptMs?: number;
-	cacheTokens: number;
-}
-
-export interface ErrorDialogState {
-	type: 'timeout' | 'server';
-	message: string;
-	contextInfo?: { n_prompt_tokens: number; n_ctx: number };
-}
-
-export interface ChatStreamCallbacks {
-	onChunk?: (chunk: string) => void;
-	onReasoningChunk?: (chunk: string) => void;
-	onToolCallChunk?: (chunk: string) => void;
-	onAttachments?: (extras: DatabaseMessageExtra[]) => void;
-	onModel?: (model: string) => void;
-	onTimings?: (timings?: ChatMessageTimings, promptProgress?: ChatMessagePromptProgress) => void;
-	onComplete?: (
-		content?: string,
-		reasoningContent?: string,
-		timings?: ChatMessageTimings,
-		toolCallContent?: string
-	) => void;
-	onError?: (error: Error) => void;
-}
-
 interface ChatStoreStateCallbacks {
 	setChatLoading: (convId: string, loading: boolean) => void;
 	setChatStreaming: (convId: string, response: string, messageId: string) => void;
diff --git a/tools/server/webui/src/lib/clients/index.ts b/tools/server/webui/src/lib/clients/index.ts
index 4689b699ed..70f136c199 100644
--- a/tools/server/webui/src/lib/clients/index.ts
+++ b/tools/server/webui/src/lib/clients/index.ts
@@ -21,16 +21,9 @@ export { MCPClient, mcpClient } from './mcp.client';
 
 // Chat Client
 export { ChatClient, chatClient } from './chat.client';
-export type { ChatStreamCallbacks, ApiProcessingState, ErrorDialogState } from './chat.client';
 
 // Agentic Client
 export { AgenticClient, agenticClient } from './agentic.client';
-export type {
-	AgenticFlowCallbacks,
-	AgenticFlowOptions,
-	AgenticFlowParams,
-	AgenticFlowResult
-} from './agentic.client';
 
 // Conversations Client
 export { ConversationsClient, conversationsClient } from './conversations.client';
diff --git a/tools/server/webui/src/lib/constants/binary-detection.ts b/tools/server/webui/src/lib/constants/binary-detection.ts
index a4440fde5d..21a95cc883 100644
--- a/tools/server/webui/src/lib/constants/binary-detection.ts
+++ b/tools/server/webui/src/lib/constants/binary-detection.ts
@@ -1,11 +1,4 @@
-export interface BinaryDetectionOptions {
-	/** Number of characters to check from the beginning of the file */
-	prefixLength: number;
-	/** Maximum ratio of suspicious characters allowed (0.0 to 1.0) */
-	suspiciousCharThresholdRatio: number;
-	/** Maximum absolute number of null bytes allowed */
-	maxAbsoluteNullBytes: number;
-}
+import type { BinaryDetectionOptions } from '$lib/types';
 
 export const DEFAULT_BINARY_DETECTION_OPTIONS: BinaryDetectionOptions = {
 	prefixLength: 1024 * 10, // Check the first 10KB of the string
diff --git a/tools/server/webui/src/lib/hooks/use-processing-state.svelte.ts b/tools/server/webui/src/lib/hooks/use-processing-state.svelte.ts
index 25ad766e8c..c9cb47dc1d 100644
--- a/tools/server/webui/src/lib/hooks/use-processing-state.svelte.ts
+++ b/tools/server/webui/src/lib/hooks/use-processing-state.svelte.ts
@@ -1,20 +1,7 @@
 import { activeProcessingState } from '$lib/stores/chat.svelte';
 import { config } from '$lib/stores/settings.svelte';
 import { STATS_UNITS } from '$lib/constants/processing-info';
-
-export interface LiveProcessingStats {
-	tokensProcessed: number;
-	totalTokens: number;
-	timeMs: number;
-	tokensPerSecond: number;
-	etaSecs?: number;
-}
-
-export interface LiveGenerationStats {
-	tokensGenerated: number;
-	timeMs: number;
-	tokensPerSecond: number;
-}
+import type { ApiProcessingState, LiveProcessingStats, LiveGenerationStats } from '$lib/types';
 
 export interface UseProcessingStateReturn {
 	readonly processingState: ApiProcessingState | null;
diff --git a/tools/server/webui/src/lib/services/parameter-sync.service.ts b/tools/server/webui/src/lib/services/parameter-sync.service.ts
index f9e3e3b96b..deb814e96a 100644
--- a/tools/server/webui/src/lib/services/parameter-sync.service.ts
+++ b/tools/server/webui/src/lib/services/parameter-sync.service.ts
@@ -13,24 +13,13 @@
  */
 
 import { normalizeFloatingPoint } from '$lib/utils';
-
-export type ParameterSource = 'default' | 'custom';
-export type ParameterValue = string | number | boolean;
-export type ParameterRecord = Record<string, ParameterValue>;
-
-export interface ParameterInfo {
-	value: string | number | boolean;
-	source: ParameterSource;
-	serverDefault?: string | number | boolean;
-	userOverride?: string | number | boolean;
-}
-
-export interface SyncableParameter {
-	key: string;
-	serverKey: string;
-	type: 'number' | 'string' | 'boolean';
-	canSync: boolean;
-}
+import type {
+	SyncableParameter,
+	ParameterRecord,
+	ParameterInfo,
+	ParameterValue,
+	ParameterSource
+} from '$lib/types';
 
 /**
  * Mapping of webui setting keys to server parameter keys
diff --git a/tools/server/webui/src/lib/stores/agentic.svelte.ts b/tools/server/webui/src/lib/stores/agentic.svelte.ts
index 9af1d67afb..e330c0d383 100644
--- a/tools/server/webui/src/lib/stores/agentic.svelte.ts
+++ b/tools/server/webui/src/lib/stores/agentic.svelte.ts
@@ -26,21 +26,18 @@
  */
 
 import { browser } from '$app/environment';
-import type { AgenticFlowParams, AgenticFlowResult } from '$lib/clients';
-import type { AgenticSession, AgenticConfig } from '$lib/types/agentic';
-import type { SettingsConfigType } from '$lib/types/settings';
-import type { McpServerOverride } from '$lib/types/database';
+import type {
+	AgenticFlowParams,
+	AgenticFlowResult,
+	AgenticSession,
+	AgenticConfig,
+	SettingsConfigType,
+	McpServerOverride
+} from '$lib/types';
 import { DEFAULT_AGENTIC_CONFIG } from '$lib/constants/agentic';
 import { mcpStore } from '$lib/stores/mcp.svelte';
 import { agenticClient } from '$lib/clients/agentic.client';
 
-export type {
-	AgenticFlowCallbacks,
-	AgenticFlowOptions,
-	AgenticFlowParams,
-	AgenticFlowResult
-} from '$lib/clients';
-
 /**
  * Creates a fresh agentic session with default values.
  */
diff --git a/tools/server/webui/src/lib/stores/chat.svelte.ts b/tools/server/webui/src/lib/stores/chat.svelte.ts
index 427947fc45..fa5ea74554 100644
--- a/tools/server/webui/src/lib/stores/chat.svelte.ts
+++ b/tools/server/webui/src/lib/stores/chat.svelte.ts
@@ -21,12 +21,15 @@
 
 import { SvelteMap } from 'svelte/reactivity';
 import { browser } from '$app/environment';
-import { chatClient, type ApiProcessingState, type ErrorDialogState } from '$lib/clients';
-import type { DatabaseMessage, DatabaseMessageExtra } from '$lib/types/database';
+import { chatClient } from '$lib/clients';
+import type {
+	ApiProcessingState,
+	ErrorDialogState,
+	DatabaseMessage,
+	DatabaseMessageExtra
+} from '$lib/types';
 import { MessageRole, MessageType } from '$lib/enums';
 
-export type { ApiProcessingState, ErrorDialogState };
-
 class ChatStore {
 	activeProcessingState = $state<ApiProcessingState | null>(null);
 	currentResponse = $state('');
diff --git a/tools/server/webui/src/lib/types/agentic.d.ts b/tools/server/webui/src/lib/types/agentic.d.ts
index d51ac991b4..4217852deb 100644
--- a/tools/server/webui/src/lib/types/agentic.d.ts
+++ b/tools/server/webui/src/lib/types/agentic.d.ts
@@ -1,5 +1,11 @@
 import type { MessageRole } from '$lib/enums';
-import type { ApiChatCompletionRequest, ApiChatMessageContentPart } from './api';
+import type {
+	ApiChatCompletionRequest,
+	ApiChatMessageContentPart,
+	ApiChatMessageData
+} from './api';
+import type { ChatMessageTimings, ChatMessagePromptProgress } from './chat';
+import type { DatabaseMessage, DatabaseMessageExtra, McpServerOverride } from './database';
 
 /**
  * Agentic orchestration configuration.
@@ -61,3 +67,53 @@ export interface AgenticSession {
 	lastError: Error | null;
 	streamingToolCall: { name: string; arguments: string } | null;
 }
+
+/**
+ * Callbacks for agentic flow execution
+ */
+export interface AgenticFlowCallbacks {
+	onChunk?: (chunk: string) => void;
+	onReasoningChunk?: (chunk: string) => void;
+	onToolCallChunk?: (serializedToolCalls: string) => void;
+	onAttachments?: (extras: DatabaseMessageExtra[]) => void;
+	onModel?: (model: string) => void;
+	onComplete?: (
+		content: string,
+		reasoningContent?: string,
+		timings?: ChatMessageTimings,
+		toolCalls?: string
+	) => void;
+	onError?: (error: Error) => void;
+	onTimings?: (timings?: ChatMessageTimings, promptProgress?: ChatMessagePromptProgress) => void;
+}
+
+/**
+ * Options for agentic flow execution
+ */
+export interface AgenticFlowOptions {
+	stream?: boolean;
+	model?: string;
+	temperature?: number;
+	max_tokens?: number;
+	[key: string]: unknown;
+}
+
+/**
+ * Parameters for starting an agentic flow
+ */
+export interface AgenticFlowParams {
+	conversationId: string;
+	messages: (ApiChatMessageData | (DatabaseMessage & { extra?: DatabaseMessageExtra[] }))[];
+	options?: AgenticFlowOptions;
+	callbacks: AgenticFlowCallbacks;
+	signal?: AbortSignal;
+	perChatOverrides?: McpServerOverride[];
+}
+
+/**
+ * Result of an agentic flow execution
+ */
+export interface AgenticFlowResult {
+	handled: boolean;
+	error?: Error;
+}
diff --git a/tools/server/webui/src/lib/types/chat.d.ts b/tools/server/webui/src/lib/types/chat.d.ts
index f35aacaf07..6e79e1056e 100644
--- a/tools/server/webui/src/lib/types/chat.d.ts
+++ b/tools/server/webui/src/lib/types/chat.d.ts
@@ -1,3 +1,5 @@
+import type { DatabaseMessageExtra } from './database';
+
 export interface ChatUploadedFile {
 	id: string;
 	name: string;
@@ -93,3 +95,67 @@ export interface ChatMessageToolCallTiming {
 	duration_ms: number;
 	success: boolean;
 }
+
+/**
+ * Callbacks for streaming chat responses
+ */
+export interface ChatStreamCallbacks {
+	onChunk?: (chunk: string) => void;
+	onReasoningChunk?: (chunk: string) => void;
+	onToolCallChunk?: (chunk: string) => void;
+	onAttachments?: (extras: DatabaseMessageExtra[]) => void;
+	onModel?: (model: string) => void;
+	onTimings?: (timings?: ChatMessageTimings, promptProgress?: ChatMessagePromptProgress) => void;
+	onComplete?: (
+		content?: string,
+		reasoningContent?: string,
+		timings?: ChatMessageTimings,
+		toolCallContent?: string
+	) => void;
+	onError?: (error: Error) => void;
+}
+
+/**
+ * Error dialog state for displaying server/timeout errors
+ */
+export interface ErrorDialogState {
+	type: 'timeout' | 'server';
+	message: string;
+	contextInfo?: { n_prompt_tokens: number; n_ctx: number };
+}
+
+/**
+ * Live processing stats during prompt evaluation
+ */
+export interface LiveProcessingStats {
+	tokensProcessed: number;
+	totalTokens: number;
+	timeMs: number;
+	tokensPerSecond: number;
+	etaSecs?: number;
+}
+
+/**
+ * Live generation stats during token generation
+ */
+export interface LiveGenerationStats {
+	tokensGenerated: number;
+	timeMs: number;
+	tokensPerSecond: number;
+}
+
+/**
+ * Options for getting attachment display items
+ */
+export interface AttachmentDisplayItemsOptions {
+	uploadedFiles?: ChatUploadedFile[];
+	attachments?: DatabaseMessageExtra[];
+}
+
+/**
+ * Result of file processing operation
+ */
+export interface FileProcessingResult {
+	extras: DatabaseMessageExtra[];
+	emptyFiles: string[];
+}
diff --git a/tools/server/webui/src/lib/types/common.d.ts b/tools/server/webui/src/lib/types/common.d.ts
index e63716b773..a24aa87089 100644
--- a/tools/server/webui/src/lib/types/common.d.ts
+++ b/tools/server/webui/src/lib/types/common.d.ts
@@ -1,3 +1,5 @@
+import type { AttachmentType } from '$lib/enums';
+
 /**
  * Common utility types used across the application
  */
@@ -10,3 +12,32 @@ export interface KeyValuePair {
 	key: string;
 	value: string;
 }
+
+/**
+ * Binary detection configuration options
+ */
+export interface BinaryDetectionOptions {
+	/** Number of characters to check from the beginning of the file */
+	prefixLength: number;
+	/** Maximum ratio of suspicious characters allowed (0.0 to 1.0) */
+	suspiciousCharThresholdRatio: number;
+	/** Maximum absolute number of null bytes allowed */
+	maxAbsoluteNullBytes: number;
+}
+
+/**
+ * Format for text attachments when copied to clipboard
+ */
+export interface ClipboardTextAttachment {
+	type: typeof AttachmentType.TEXT;
+	name: string;
+	content: string;
+}
+
+/**
+ * Parsed result from clipboard content
+ */
+export interface ParsedClipboardContent {
+	message: string;
+	textAttachments: ClipboardTextAttachment[];
+}
diff --git a/tools/server/webui/src/lib/types/index.ts b/tools/server/webui/src/lib/types/index.ts
index 46a9a68f8a..8a67460124 100644
--- a/tools/server/webui/src/lib/types/index.ts
+++ b/tools/server/webui/src/lib/types/index.ts
@@ -39,11 +39,21 @@ export type {
 	ChatAttachmentPreviewItem,
 	ChatMessageSiblingInfo,
 	ChatMessagePromptProgress,
-	ChatMessageTimings
+	ChatMessageTimings,
+	ChatMessageAgenticTimings,
+	ChatMessageAgenticTurnStats,
+	ChatMessageToolCallTiming,
+	ChatStreamCallbacks,
+	ErrorDialogState,
+	LiveProcessingStats,
+	LiveGenerationStats,
+	AttachmentDisplayItemsOptions,
+	FileProcessingResult
 } from './chat.d';
 
 // Database types
 export type {
+	McpServerOverride,
 	DatabaseConversation,
 	DatabaseMessageExtraAudioFile,
 	DatabaseMessageExtraImageFile,
@@ -58,18 +68,28 @@ export type {
 } from './database';
 
 // Model types
-export type { ModelModalities, ModelOption } from './models';
+export type { ModelModalities, ModelOption, ModalityCapabilities } from './models';
 
 // Settings types
 export type {
 	SettingsConfigValue,
 	SettingsFieldConfig,
 	SettingsChatServiceOptions,
-	SettingsConfigType
+	SettingsConfigType,
+	ParameterSource,
+	ParameterValue,
+	ParameterRecord,
+	ParameterInfo,
+	SyncableParameter
 } from './settings';
 
 // Common types
-export type { KeyValuePair } from './common';
+export type {
+	KeyValuePair,
+	BinaryDetectionOptions,
+	ClipboardTextAttachment,
+	ParsedClipboardContent
+} from './common';
 
 // MCP types
 export type {
@@ -99,3 +119,18 @@ export type {
 	GetPromptResult,
 	PromptMessage
 } from './mcp';
+
+// Agentic types
+export type {
+	AgenticConfig,
+	AgenticToolCallPayload,
+	AgenticMessage,
+	AgenticAssistantMessage,
+	AgenticToolCallList,
+	AgenticChatCompletionRequest,
+	AgenticSession,
+	AgenticFlowCallbacks,
+	AgenticFlowOptions,
+	AgenticFlowParams,
+	AgenticFlowResult
+} from './agentic';
diff --git a/tools/server/webui/src/lib/types/models.d.ts b/tools/server/webui/src/lib/types/models.d.ts
index e4923b66a9..505867a1f0 100644
--- a/tools/server/webui/src/lib/types/models.d.ts
+++ b/tools/server/webui/src/lib/types/models.d.ts
@@ -15,3 +15,11 @@ export interface ModelOption {
 	details?: ApiModelDetails['details'];
 	meta?: ApiModelDataEntry['meta'];
 }
+
+/**
+ * Modality capabilities for file validation
+ */
+export interface ModalityCapabilities {
+	hasVision: boolean;
+	hasAudio: boolean;
+}
diff --git a/tools/server/webui/src/lib/types/settings.d.ts b/tools/server/webui/src/lib/types/settings.d.ts
index 82c037c82c..3693c29cb0 100644
--- a/tools/server/webui/src/lib/types/settings.d.ts
+++ b/tools/server/webui/src/lib/types/settings.d.ts
@@ -69,3 +69,24 @@ export interface SettingsChatServiceOptions {
 export type SettingsConfigType = typeof SETTING_CONFIG_DEFAULT & {
 	[key: string]: SettingsConfigValue;
 };
+
+/**
+ * Parameter synchronization types for server defaults and user overrides
+ */
+export type ParameterSource = 'default' | 'custom';
+export type ParameterValue = string | number | boolean;
+export type ParameterRecord = Record<string, ParameterValue>;
+
+export interface ParameterInfo {
+	value: string | number | boolean;
+	source: ParameterSource;
+	serverDefault?: string | number | boolean;
+	userOverride?: string | number | boolean;
+}
+
+export interface SyncableParameter {
+	key: string;
+	serverKey: string;
+	type: 'number' | 'string' | 'boolean';
+	canSync: boolean;
+}
diff --git a/tools/server/webui/src/lib/utils/attachment-display.ts b/tools/server/webui/src/lib/utils/attachment-display.ts
index 78e7afa863..f10662704b 100644
--- a/tools/server/webui/src/lib/utils/attachment-display.ts
+++ b/tools/server/webui/src/lib/utils/attachment-display.ts
@@ -1,5 +1,10 @@
 import { AttachmentType, FileTypeCategory, SpecialFileType } from '$lib/enums';
 import { getFileTypeCategory, getFileTypeCategoryByExtension, isImageFile } from '$lib/utils';
+import type {
+	AttachmentDisplayItemsOptions,
+	ChatUploadedFile,
+	DatabaseMessageExtra
+} from '$lib/types';
 
 /**
  * Formats attachment content for API requests with consistent header style.
@@ -21,11 +26,6 @@ export function formatAttachmentText(
 	return `\n\n--- ${label}: ${header} ---\n${content}`;
 }
 
-export interface AttachmentDisplayItemsOptions {
-	uploadedFiles?: ChatUploadedFile[];
-	attachments?: DatabaseMessageExtra[];
-}
-
 /**
  * Check if an uploaded file is an MCP prompt
  */
diff --git a/tools/server/webui/src/lib/utils/browser-only.ts b/tools/server/webui/src/lib/utils/browser-only.ts
index 0af800638b..27d2be4aaa 100644
--- a/tools/server/webui/src/lib/utils/browser-only.ts
+++ b/tools/server/webui/src/lib/utils/browser-only.ts
@@ -23,7 +23,7 @@ export {
 } from './pdf-processing';
 
 // File conversion utilities (depends on pdf-processing)
-export { parseFilesToMessageExtras, type FileProcessingResult } from './convert-files-to-extra';
+export { parseFilesToMessageExtras } from './convert-files-to-extra';
 
 // File upload processing utilities (depends on pdf-processing, svg-to-png, webp-to-png)
 export { processFilesToChatUploaded } from './process-uploaded-files';
diff --git a/tools/server/webui/src/lib/utils/clipboard.ts b/tools/server/webui/src/lib/utils/clipboard.ts
index 940e64c8ff..7ea1fa33be 100644
--- a/tools/server/webui/src/lib/utils/clipboard.ts
+++ b/tools/server/webui/src/lib/utils/clipboard.ts
@@ -3,8 +3,10 @@ import { AttachmentType } from '$lib/enums';
 import type {
 	DatabaseMessageExtra,
 	DatabaseMessageExtraTextFile,
-	DatabaseMessageExtraLegacyContext
-} from '$lib/types/database';
+	DatabaseMessageExtraLegacyContext,
+	ClipboardTextAttachment,
+	ParsedClipboardContent
+} from '$lib/types';
 
 /**
  * Copy text to clipboard with toast notification
@@ -68,23 +70,6 @@ export async function copyCodeToClipboard(
 	return copyToClipboard(rawCode, successMessage, errorMessage);
 }
 
-/**
- * Format for text attachments when copied to clipboard
- */
-export interface ClipboardTextAttachment {
-	type: typeof AttachmentType.TEXT;
-	name: string;
-	content: string;
-}
-
-/**
- * Parsed result from clipboard content
- */
-export interface ParsedClipboardContent {
-	message: string;
-	textAttachments: ClipboardTextAttachment[];
-}
-
 /**
  * Formats a message with text attachments for clipboard copying.
  *
diff --git a/tools/server/webui/src/lib/utils/convert-files-to-extra.ts b/tools/server/webui/src/lib/utils/convert-files-to-extra.ts
index f589af46dd..15074e919a 100644
--- a/tools/server/webui/src/lib/utils/convert-files-to-extra.ts
+++ b/tools/server/webui/src/lib/utils/convert-files-to-extra.ts
@@ -7,6 +7,7 @@ import { modelsStore } from '$lib/stores/models.svelte';
 import { getFileTypeCategory } from '$lib/utils';
 import { readFileAsText, isLikelyTextFile } from './text-files';
 import { toast } from 'svelte-sonner';
+import type { FileProcessingResult, ChatUploadedFile, DatabaseMessageExtra } from '$lib/types';
 
 function readFileAsBase64(file: File): Promise<string> {
 	return new Promise((resolve, reject) => {
@@ -25,11 +26,6 @@ function readFileAsBase64(file: File): Promise<string> {
 	});
 }
 
-export interface FileProcessingResult {
-	extras: DatabaseMessageExtra[];
-	emptyFiles: string[];
-}
-
 export async function parseFilesToMessageExtras(
 	files: ChatUploadedFile[],
 	activeModelId?: string
diff --git a/tools/server/webui/src/lib/utils/index.ts b/tools/server/webui/src/lib/utils/index.ts
index a55382b2c7..280dc9a821 100644
--- a/tools/server/webui/src/lib/utils/index.ts
+++ b/tools/server/webui/src/lib/utils/index.ts
@@ -12,10 +12,7 @@ export { getAuthHeaders, getJsonHeaders } from './api-headers';
 export { validateApiKey } from './api-key-validation';
 
 // Attachment utilities
-export {
-	getAttachmentDisplayItems,
-	type AttachmentDisplayItemsOptions
-} from './attachment-display';
+export { getAttachmentDisplayItems } from './attachment-display';
 export { isTextFile, isImageFile, isPdfFile, isAudioFile } from './attachment-type';
 
 // Textarea utilities
@@ -45,9 +42,7 @@ export {
 	copyCodeToClipboard,
 	formatMessageForClipboard,
 	parseClipboardContent,
-	hasClipboardAttachments,
-	type ClipboardTextAttachment,
-	type ParsedClipboardContent
+	hasClipboardAttachments
 } from './clipboard';
 
 // File preview utilities
@@ -82,8 +77,7 @@ export { maskInlineLaTeX, preprocessLaTeX } from './latex-protection';
 export {
 	isFileTypeSupportedByModel,
 	filterFilesByModalities,
-	generateModalityErrorMessage,
-	type ModalityCapabilities
+	generateModalityErrorMessage
 } from './modality-file-validation';
 
 // Model name utilities
diff --git a/tools/server/webui/src/lib/utils/modality-file-validation.ts b/tools/server/webui/src/lib/utils/modality-file-validation.ts
index 136c084146..9b52e93dbe 100644
--- a/tools/server/webui/src/lib/utils/modality-file-validation.ts
+++ b/tools/server/webui/src/lib/utils/modality-file-validation.ts
@@ -5,12 +5,7 @@
 
 import { getFileTypeCategory } from '$lib/utils';
 import { FileTypeCategory } from '$lib/enums';
-
-/** Modality capabilities for file validation */
-export interface ModalityCapabilities {
-	hasVision: boolean;
-	hasAudio: boolean;
-}
+import type { ModalityCapabilities } from '$lib/types';
 
 /**
  * Check if a file type is supported by the given modalities
diff --git a/tools/server/webui/src/lib/utils/text-files.ts b/tools/server/webui/src/lib/utils/text-files.ts
index e8006de64d..b7fdd4038c 100644
--- a/tools/server/webui/src/lib/utils/text-files.ts
+++ b/tools/server/webui/src/lib/utils/text-files.ts
@@ -3,10 +3,8 @@
  * Handles text file detection, reading, and validation
  */
 
-import {
-	DEFAULT_BINARY_DETECTION_OPTIONS,
-	type BinaryDetectionOptions
-} from '$lib/constants/binary-detection';
+import { DEFAULT_BINARY_DETECTION_OPTIONS } from '$lib/constants/binary-detection';
+import type { BinaryDetectionOptions } from '$lib/types';
 import { FileExtensionText } from '$lib/enums';
 
 /**