refactor: timeline manager renames (#19007)

* refactor: timeline manager renames

* refactor(web): improve timeline manager naming consistency

- Rename AddContext → GroupInsertionCache for clearer purpose
- Rename TimelineDay → DayGroup for better clarity
- Rename TimelineMonth → MonthGroup for better clarity
- Replace all "bucket" references with "monthGroup" terminology
- Update all component props, method names, and variable references
- Maintain consistent naming patterns across TypeScript and Svelte files

* refactor(web): rename buckets to months in timeline manager

- Rename TimelineManager.buckets property to months
- Update all store.buckets references to store.months
- Use 'month' shorthand for monthGroup arguments (not method names)
- Update component templates and test files for consistency
- Maintain API-related 'bucket' terminology (bucketHeight, getTimeBucket)

* refactor(web): rename assetStore to timelineManager and update types

- Rename assetStore variables to timelineManager in all .svelte files
- Update parameter names in actions.ts and asset-utils.ts functions
- Rename AssetStoreLayoutOptions to TimelineManagerLayoutOptions
- Rename AssetStoreOptions to TimelineManagerOptions
- Move assets-store.spec.ts to timeline-manager.spec.ts

* refactor(web): rename intersectingAssets to viewerAssets and fix property references

- Rename intersectingAssets to viewerAssets in DayGroup and MonthGroup classes
- Update arrow function parameters to use viewerAsset/viewAsset shorthand
- Rename topIntersectingBucket to topIntersectingMonthGroup
- Fix dateGroups references to dayGroups in asset-utils.ts and album page
- Update template loops and variable names in Svelte components

* refactor(web): rename #initializeTimeBuckets to #initializeMonthGroups and bucketDateFormatted to monthGroupTitle

* refactor(web): rename monthGroupHeight to height

* refactor(web): rename bucketCount to assetsCount, bucketsIterator to monthGroupIterator, and related properties

* refactor(web): rename count to assetCount in TimelineManager

* refactor(web): rename LiteBucket to ScrubberMonth and update scrubber variables

- Rename LiteBucket type to ScrubberMonth
- Rename bucketDateFormattted to title in ScrubberMonth type
- Rename bucketPercentY to monthGroupPercentY in scrubber component
- Rename scrubBucket to scrubberMonth and scrubBucketPercent to scrubberMonthPercent

* fix remaining refs to bucket

* reset submodule to correct commit

* reset submodule to correct commit

* refactor(web): extract TimelineManager internals into separate modules

- Move search-related functions to internal/search-support.svelte.ts
- Extract websocket event handling into WebsocketSupport class
- Move utility functions (updateObject, isMismatched) to internal/utils.svelte.ts
- Update imports in tests to use new module structure

* refactor(web): extract intersection logic from TimelineManager

- Create intersection-support.svelte.ts with updateIntersection and calculateIntersecting functions
- Remove private intersection methods from TimelineManager
- Export findMonthGroupForAsset from search-support for reuse
- Update TimelineManager to use the extracted intersection functions

* refactor(web): rename a few methods in intersecting

* refactor(web): rename a few methods in intersecting

* refactor(web): extract layout logic from TimelineManager

- Create layout-support.svelte.ts with updateGeometry and layoutMonthGroup functions
- Remove private layout methods from TimelineManager
- Update TimelineManager to use the extracted layout functions
- Remove unused UpdateGeometryOptions import

* refactor(web): extract asset operations from TimelineManager

- Create operations-support.svelte.ts with addAssetsToMonthGroups and runAssetOperation functions
- Remove private asset operation methods from TimelineManager
- Update TimelineManager to use extracted operation functions with proper AssetOrder handling
- Rename getMonthGroupIndexByAssetId to getMonthGroupByAssetId for consistency
- Move utility functions from utils.svelte.ts to internal/utils.svelte.ts
- Fix method name references in asset-grid.svelte and tests

* refactor(web): extract loading logic from TimelineManager

- Create load-support.svelte.ts with loadFromTimeBuckets function
- Extract time bucket loading, album asset handling, and error logging
- Simplify TimelineManager's loadMonthGroup method to use extracted function

* refresh timeline after archive keyboard shortcut

* remove debugger

* rename

* Review comments - remove shadowed var

* reduce indents - early return

* review comment

* refactor: simplify asset filtering in addAssets method

Replace for loop with filter operation for better readability

* fix: bad merge

* refactor(web): simplify timeline layout algorithm

- Replace rowSpaceRemaining array with direct cumulative width tracking
- Invert logic from tracking remaining space to tracking used space
- Fix spelling: cummulative to cumulative
- Rename lastRowHeight to currentRowHeight for clarity
- Remove confusing lastRow variable and simplify final height calculation
- Add explanatory comments for clarity
- Rename loop variable assetGroup to dayGroup for consistency

* simplify assetsIterator usage

* merge/lint

---------

Co-authored-by: Alex <alex.tran1502@gmail.com>

web/src/lib/managers/timeline-manager/utils.svelte.ts

@@ -1,34 +1,4 @@
 import type { TimelineAsset } from './types';
 
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-export function updateObject(target: any, source: any): boolean {
-  if (!target) {
-    return false;
-  }
-  let updated = false;
-  for (const key in source) {
-    if (!Object.prototype.hasOwnProperty.call(source, key)) {
-      continue;
-    }
-    if (key === '__proto__' || key === 'constructor') {
-      continue;
-    }
-    const isDate = target[key] instanceof Date;
-    if (typeof target[key] === 'object' && !isDate) {
-      updated = updated || updateObject(target[key], source[key]);
-    } else {
-      if (target[key] !== source[key]) {
-        target[key] = source[key];
-        updated = true;
-      }
-    }
-  }
-  return updated;
-}
-
-export function isMismatched<T>(option: T | undefined, value: T): boolean {
-  return option === undefined ? false : option !== value;
-}
-
 export const assetSnapshot = (asset: TimelineAsset): TimelineAsset => $state.snapshot(asset);
 export const assetsSnapshot = (assets: TimelineAsset[]) => assets.map((asset) => $state.snapshot(asset));