feat: add memory selection metrics to HypaV3 (#861)

# PR Checklist
- [ ] Have you checked if it works normally in all models? *Ignore this
if it doesn't use models.*
- [ ] Have you checked if it works normally in all web, local, and node
hosted versions? If it doesn't, have you blocked it in those versions?
- [ ] Have you added type definitions?

# Preview

![preview](https://github.com/user-attachments/assets/8b805ff5-6242-401b-a1c2-ca3ca17355d6)

# Description
This PR introduces following:
- Add memory selection metrics to HypaV3

src/lib/Others/HypaV3Modal.svelte

@@ -3,6 +3,8 @@
   import {
     SearchIcon,
     SettingsIcon,
+    MoreVerticalIcon,
+    BarChartIcon,
     Trash2Icon,
     XIcon,
     ChevronUpIcon,
@@ -88,6 +90,8 @@
   let expandedMessageUIState = $state<ExpandedMessageUI>(null);
   let searchUIState = $state<SearchUI>(null);
   let showImportantOnly = $state(false);
+  let showDropdown = $state(false);
+  let showMetrics = $state(false);
 
   $effect.pre(() => {
     untrack(() => {
@@ -95,7 +99,6 @@
         DBState.db.characters[$selectedCharID].chatPage
       ].hypaV3Data ??= {
         summaries: [],
-        lastSelectedSummaries: [],
       };
     });
 
@@ -187,15 +190,14 @@
 
     // Search summary index
     if (query.match(/^#\d+$/)) {
-      const summaryNumber = parseInt(query.substring(1)) - 1;
+      const summaryIndex = parseInt(query.substring(1)) - 1;
 
       if (
-        summaryNumber >= 0 &&
-        summaryNumber < hypaV3DataState.summaries.length &&
-        (!showImportantOnly ||
-          hypaV3DataState.summaries[summaryNumber].isImportant)
+        summaryIndex >= 0 &&
+        summaryIndex < hypaV3DataState.summaries.length &&
+        isSummaryVisible(summaryIndex)
       ) {
-        results.push(new SummarySearchResult(summaryNumber, 0, 0));
+        results.push(new SummarySearchResult(summaryIndex, 0, 0));
       }
 
       return results;
@@ -204,10 +206,7 @@
     if (isGuidLike(query)) {
       // Search chatMemo
       summaryUIStates.forEach((summaryUI, summaryIndex) => {
-        if (
-          !showImportantOnly ||
-          hypaV3DataState.summaries[summaryIndex].isImportant
-        ) {
+        if (isSummaryVisible(summaryIndex)) {
           summaryUI.chatMemoRefs.forEach((buttonRef, memoIndex) => {
             const buttonText = buttonRef.textContent?.toLowerCase() || "";
 
@@ -220,10 +219,7 @@
     } else {
       // Search summary
       summaryUIStates.forEach((summaryUI, summaryIndex) => {
-        if (
-          !showImportantOnly ||
-          hypaV3DataState.summaries[summaryIndex].isImportant
-        ) {
+        if (isSummaryVisible(summaryIndex)) {
           const textAreaText = summaryUI.originalRef.value?.toLowerCase();
           let pos = -1;
 
@@ -375,6 +371,23 @@
     textarea.scrollTop = selectionTop - textarea.clientHeight / 2;
   }
 
+  function isSummaryVisible(index: number): boolean {
+    const summary = hypaV3DataState.summaries[index];
+    const metrics = hypaV3DataState.metrics;
+
+    const metricsFilter =
+      !showMetrics ||
+      !metrics ||
+      metrics.lastImportantSummaries.includes(index) ||
+      metrics.lastRecentSummaries.includes(index) ||
+      metrics.lastSimilarSummaries.includes(index) ||
+      metrics.lastRandomSummaries.includes(index);
+
+    const importantFilter = !showImportantOnly || summary.isImportant;
+
+    return metricsFilter && importantFilter;
+  }
+
   async function toggleTranslate(
     summaryIndex: number,
     regenerate?: boolean
@@ -730,7 +743,6 @@
           chatMemos: [...mainChunk.chatMemos],
           isImportant: false,
         })),
-        lastSelectedSummaries: [],
       };
 
       chat.hypaV3Data = newHypaV3Data;
@@ -819,11 +831,17 @@
   <!-- Modal wrapper -->
   <div class="flex justify-center w-full h-full">
     <!-- Modal window -->
+    <!-- svelte-ignore a11y_click_events_have_key_events -->
+    <!-- svelte-ignore a11y_no_static_element_interactions -->
     <div
       class="flex flex-col p-3 sm:p-6 rounded-lg bg-zinc-900 w-full max-w-3xl {hypaV3DataState
         .summaries.length === 0
         ? 'h-fit'
         : 'h-full'}"
+      onclick={(e) => {
+        e.stopPropagation();
+        showDropdown = false;
+      }}
     >
       <!-- Header -->
       <div class="flex justify-between items-center mb-2 sm:mb-4">
@@ -831,6 +849,7 @@
         <h1 class="text-lg sm:text-2xl font-semibold text-zinc-300">
           {language.hypaV3Modal.titleLabel}
         </h1>
+
         <!-- Buttons Container -->
         <div class="flex items-center gap-2">
           <!-- Search Button -->
@@ -874,6 +893,44 @@
             <SettingsIcon class="w-6 h-6" />
           </button>
 
+          <!-- Show Dropdown Button -->
+          <div class="relative">
+            <button
+              class="p-2 text-zinc-400 hover:text-zinc-200 transition-colors"
+              tabindex="-1"
+              onclick={(e) => {
+                e.stopPropagation();
+                showDropdown = true;
+              }}
+            >
+              <MoreVerticalIcon class="w-6 h-6" />
+            </button>
+
+            {#if showDropdown}
+              <div
+                class="absolute z-10 right-0 mt-1 p-2 rounded-md shadow-lg border border-zinc-700 bg-zinc-800"
+              >
+                <!-- Buttons Container -->
+                <div class="flex items-center gap-2">
+                  <!-- Show Metrics Button -->
+                  <button
+                    class="p-2 transition-colors {showMetrics
+                      ? 'text-blue-400 hover:text-blue-300'
+                      : 'text-zinc-400 hover:text-zinc-200'}"
+                    tabindex="-1"
+                    onclick={() => {
+                      if (searchUIState) {
+                        searchUIState.query = "";
+                        searchUIState.results = [];
+                        searchUIState.currentResultIndex = -1;
+                      }
+
+                      showMetrics = !showMetrics;
+                    }}
+                  >
+                    <BarChartIcon class="w-6 h-6" />
+                  </button>
+
                   <!-- Reset Button -->
                   <button
                     class="p-2 text-zinc-400 hover:text-rose-300 transition-colors"
@@ -889,13 +946,16 @@
                           DBState.db.characters[$selectedCharID].chatPage
                         ].hypaV3Data = {
                           summaries: [],
-                  lastSelectedSummaries: [],
                         };
                       }
                     }}
                   >
                     <Trash2Icon class="w-6 h-6" />
                   </button>
+                </div>
+              </div>
+            {/if}
+          </div>
 
           <!-- Close Button -->
           <button
@@ -954,7 +1014,7 @@
 
           <!-- Search Bar -->
         {:else if searchUIState}
-          <div class="sticky top-0 z-40 p-2 sm:p-3 bg-zinc-800">
+          <div class="sticky top-0 p-2 sm:p-3 bg-zinc-800">
             <div class="flex items-center gap-2">
               <div class="relative flex flex-1 items-center">
                 <form
@@ -1016,7 +1076,7 @@
 
         <!-- Summaries List -->
         {#each hypaV3DataState.summaries as summary, i}
-          {#if !showImportantOnly || summary.isImportant}
+          {#if isSummaryVisible(i)}
             {#if summaryUIStates[i]}
               <!-- Summary Item  -->
               <div
@@ -1024,6 +1084,8 @@
               >
                 <!-- Original Summary Header -->
                 <div class="flex justify-between items-center">
+                  <!-- Summary Number / Metrics Container -->
+                  <div class="flex items-center gap-2">
                     <span class="text-sm text-zinc-400"
                       >{language.hypaV3Modal.summaryNumberLabel.replace(
                         "{0}",
@@ -1031,6 +1093,41 @@
                       )}</span
                     >
 
+                    {#if showMetrics && hypaV3DataState.metrics}
+                      <div class="flex flex-wrap gap-1">
+                        {#if hypaV3DataState.metrics.lastImportantSummaries.includes(i)}
+                          <span
+                            class="px-1.5 py-0.5 rounded-full text-xs whitespace-nowrap text-purple-200 bg-purple-900/70"
+                          >
+                            Important
+                          </span>
+                        {/if}
+                        {#if hypaV3DataState.metrics.lastRecentSummaries.includes(i)}
+                          <span
+                            class="px-1.5 py-0.5 rounded-full text-xs whitespace-nowrap text-blue-200 bg-blue-900/70"
+                          >
+                            Recent
+                          </span>
+                        {/if}
+                        {#if hypaV3DataState.metrics.lastSimilarSummaries.includes(i)}
+                          <span
+                            class="px-1.5 py-0.5 rounded-full text-xs whitespace-nowrap text-green-200 bg-green-900/70"
+                          >
+                            Similar
+                          </span>
+                        {/if}
+                        {#if hypaV3DataState.metrics.lastRandomSummaries.includes(i)}
+                          <span
+                            class="px-1.5 py-0.5 rounded-full text-xs whitespace-nowrap text-yellow-200 bg-yellow-900/70"
+                          >
+                            Random
+                          </span>
+                        {/if}
+                      </div>
+                    {/if}
+                  </div>
+
+                  <!-- Buttons Container -->
                   <div class="flex items-center gap-2">
                     <!-- Translate Button -->
                     <button

src/ts/process/memory/hypav3.ts

@@ -41,7 +41,13 @@ export interface HypaV3Settings {
 
 interface HypaV3Data {
   summaries: Summary[];
-  lastSelectedSummaries?: number[];
+  lastSelectedSummaries?: number[]; // legacy
+  metrics?: {
+    lastImportantSummaries: number[];
+    lastRecentSummaries: number[];
+    lastSimilarSummaries: number[];
+    lastRandomSummaries: number[];
+  };
 }
 
 export interface SerializableHypaV3Data {
@@ -50,7 +56,13 @@ export interface SerializableHypaV3Data {
     chatMemos: string[];
     isImportant: boolean;
   }[];
-  lastSelectedSummaries?: number[];
+  lastSelectedSummaries?: number[]; // legacy
+  metrics?: {
+    lastImportantSummaries: number[];
+    lastRecentSummaries: number[];
+    lastSimilarSummaries: number[];
+    lastRandomSummaries: number[];
+  };
 }
 
 interface Summary {
@@ -158,15 +170,12 @@ async function hypaMemoryV3MainExp(
   currentTokens -= db.maxResponse;
 
   // Load existing hypa data if available
-  let data: HypaV3Data = {
+  const data: HypaV3Data = room.hypaV3Data
+    ? toHypaV3Data(room.hypaV3Data)
+    : {
         summaries: [],
-    lastSelectedSummaries: [],
       };
 
-  if (room.hypaV3Data) {
-    data = toHypaV3Data(room.hypaV3Data);
-  }
-
   // Clean orphaned summaries
   if (!settings.preserveOrphanedMemory) {
     cleanOrphanedSummary(chats, data);
@@ -464,11 +473,10 @@ async function hypaMemoryV3MainExp(
   const selectedSummaries: Summary[] = [];
   const randomMemoryRatio =
     1 - settings.recentMemoryRatio - settings.similarMemoryRatio;
+  const selectedImportantSummaries: Summary[] = [];
 
   // Select important summaries
   {
-    const selectedImportantSummaries: Summary[] = [];
-
     for (const summary of data.summaries) {
       if (summary.isImportant) {
         const summaryTokens = await tokenizer.tokenizeChat({
@@ -505,10 +513,9 @@ async function hypaMemoryV3MainExp(
     availableMemoryTokens * settings.recentMemoryRatio
   );
   let consumedRecentMemoryTokens = 0;
-
-  if (settings.recentMemoryRatio > 0) {
   const selectedRecentSummaries: Summary[] = [];
 
+  if (settings.recentMemoryRatio > 0) {
     // Target only summaries that haven't been selected yet
     const unusedSummaries = data.summaries.filter(
       (e) => !selectedSummaries.includes(e)
@@ -554,10 +561,9 @@ async function hypaMemoryV3MainExp(
     availableMemoryTokens * settings.similarMemoryRatio
   );
   let consumedSimilarMemoryTokens = 0;
-
-  if (settings.similarMemoryRatio > 0) {
   const selectedSimilarSummaries: Summary[] = [];
 
+  if (settings.similarMemoryRatio > 0) {
     // Utilize unused token space from recent selection
     if (randomMemoryRatio <= 0) {
       const unusedRecentTokens =
@@ -769,10 +775,9 @@ async function hypaMemoryV3MainExp(
     availableMemoryTokens * randomMemoryRatio
   );
   let consumedRandomMemoryTokens = 0;
-
-  if (randomMemoryRatio > 0) {
   const selectedRandomSummaries: Summary[] = [];
 
+  if (randomMemoryRatio > 0) {
     // Utilize unused token space from recent and similar selection
     const unusedRecentTokens =
       reservedRecentMemoryTokens - consumedRecentMemoryTokens;
@@ -872,9 +877,20 @@ async function hypaMemoryV3MainExp(
   }
 
   // Save last selected summaries
-  data.lastSelectedSummaries = selectedSummaries.map((selectedSummary) =>
-    data.summaries.findIndex((summary) => summary === selectedSummary)
-  );
+  data.metrics = {
+    lastImportantSummaries: selectedImportantSummaries.map((selected) =>
+      data.summaries.findIndex((sum) => sum === selected)
+    ),
+    lastRecentSummaries: selectedRecentSummaries.map((selected) =>
+      data.summaries.findIndex((sum) => sum === selected)
+    ),
+    lastSimilarSummaries: selectedSimilarSummaries.map((selected) =>
+      data.summaries.findIndex((sum) => sum === selected)
+    ),
+    lastRandomSummaries: selectedRandomSummaries.map((selected) =>
+      data.summaries.findIndex((sum) => sum === selected)
+    ),
+  };
 
   const newChats: OpenAIChat[] = [
     {
@@ -927,15 +943,12 @@ async function hypaMemoryV3Main(
   currentTokens -= db.maxResponse;
 
   // Load existing hypa data if available
-  let data: HypaV3Data = {
+  const data: HypaV3Data = room.hypaV3Data
+    ? toHypaV3Data(room.hypaV3Data)
+    : {
         summaries: [],
-    lastSelectedSummaries: [],
       };
 
-  if (room.hypaV3Data) {
-    data = toHypaV3Data(room.hypaV3Data);
-  }
-
   // Clean orphaned summaries
   if (!settings.preserveOrphanedMemory) {
     cleanOrphanedSummary(chats, data);
@@ -1171,11 +1184,10 @@ async function hypaMemoryV3Main(
   const selectedSummaries: Summary[] = [];
   const randomMemoryRatio =
     1 - settings.recentMemoryRatio - settings.similarMemoryRatio;
+  const selectedImportantSummaries: Summary[] = [];
 
   // Select important summaries
   {
-    const selectedImportantSummaries: Summary[] = [];
-
     for (const summary of data.summaries) {
       if (summary.isImportant) {
         const summaryTokens = await tokenizer.tokenizeChat({
@@ -1212,10 +1224,9 @@ async function hypaMemoryV3Main(
     availableMemoryTokens * settings.recentMemoryRatio
   );
   let consumedRecentMemoryTokens = 0;
-
-  if (settings.recentMemoryRatio > 0) {
   const selectedRecentSummaries: Summary[] = [];
 
+  if (settings.recentMemoryRatio > 0) {
     // Target only summaries that haven't been selected yet
     const unusedSummaries = data.summaries.filter(
       (e) => !selectedSummaries.includes(e)
@@ -1261,10 +1272,9 @@ async function hypaMemoryV3Main(
     availableMemoryTokens * settings.similarMemoryRatio
   );
   let consumedSimilarMemoryTokens = 0;
-
-  if (settings.similarMemoryRatio > 0) {
   const selectedSimilarSummaries: Summary[] = [];
 
+  if (settings.similarMemoryRatio > 0) {
     // Utilize unused token space from recent selection
     if (randomMemoryRatio <= 0) {
       const unusedRecentTokens =
@@ -1441,10 +1451,9 @@ async function hypaMemoryV3Main(
     availableMemoryTokens * randomMemoryRatio
   );
   let consumedRandomMemoryTokens = 0;
-
-  if (randomMemoryRatio > 0) {
   const selectedRandomSummaries: Summary[] = [];
 
+  if (randomMemoryRatio > 0) {
     // Utilize unused token space from recent and similar selection
     const unusedRecentTokens =
       reservedRecentMemoryTokens - consumedRecentMemoryTokens;
@@ -1546,9 +1555,20 @@ async function hypaMemoryV3Main(
   }
 
   // Save last selected summaries
-  data.lastSelectedSummaries = selectedSummaries.map((selectedSummary) =>
-    data.summaries.findIndex((summary) => summary === selectedSummary)
-  );
+  data.metrics = {
+    lastImportantSummaries: selectedImportantSummaries.map((selected) =>
+      data.summaries.findIndex((sum) => sum === selected)
+    ),
+    lastRecentSummaries: selectedRecentSummaries.map((selected) =>
+      data.summaries.findIndex((sum) => sum === selected)
+    ),
+    lastSimilarSummaries: selectedSimilarSummaries.map((selected) =>
+      data.summaries.findIndex((sum) => sum === selected)
+    ),
+    lastRandomSummaries: selectedRandomSummaries.map((selected) =>
+      data.summaries.findIndex((sum) => sum === selected)
+    ),
+  };
 
   const newChats: OpenAIChat[] = [
     {
@@ -1578,8 +1598,11 @@ async function hypaMemoryV3Main(
 }
 
 function toHypaV3Data(serialData: SerializableHypaV3Data): HypaV3Data {
+  // Remove legacy property
+  const { lastSelectedSummaries, ...restData } = serialData;
+
   return {
-    ...serialData,
+    ...restData,
     summaries: serialData.summaries.map((summary) => ({
       ...summary,
       // Convert null back to undefined (JSON serialization converts undefined to null)