fix: text editor selection, styling, and script coverage

Clears the previous document before opening a new one, keeps the
selection when clicking the dock or rotating a box, refreshes the glass
overlay so style changes preview every time, adds double-click word
selection, and widens the Windows font stacks for Indic scripts. The
dock now publishes its own height so the swatches lay out correctly on
small screens.

src/js/editcore/core.js

@@ -146,46 +146,96 @@ export function scriptFallbackFamilies(cps) {
         'Kohinoor Devanagari',
         'Devanagari MT',
         'ITF Devanagari',
+        'Nirmala UI',
+        'Mangal',
         'Noto Sans Devanagari',
         'Arial Unicode MS',
       ],
     ],
     [
       [[0x0980, 0x09ff]],
-      ['Kohinoor Bangla', 'Bangla MN', 'Noto Sans Bengali', 'Arial Unicode MS'],
+      [
+        'Kohinoor Bangla',
+        'Bangla MN',
+        'Nirmala UI',
+        'Vrinda',
+        'Noto Sans Bengali',
+        'Arial Unicode MS',
+      ],
     ],
     [
       [[0x0a00, 0x0a7f]],
-      ['Gurmukhi MN', 'Noto Sans Gurmukhi', 'Arial Unicode MS'],
+      [
+        'Gurmukhi MN',
+        'Nirmala UI',
+        'Raavi',
+        'Noto Sans Gurmukhi',
+        'Arial Unicode MS',
+      ],
     ],
     [
       [[0x0a80, 0x0aff]],
       [
         'Kohinoor Gujarati',
         'Gujarati MT',
+        'Nirmala UI',
+        'Shruti',
         'Noto Sans Gujarati',
         'Arial Unicode MS',
       ],
     ],
     [
       [[0x0b80, 0x0bff]],
-      ['Tamil MN', 'InaiMathi', 'Noto Sans Tamil', 'Arial Unicode MS'],
+      [
+        'Tamil MN',
+        'InaiMathi',
+        'Nirmala UI',
+        'Latha',
+        'Noto Sans Tamil',
+        'Arial Unicode MS',
+      ],
     ],
     [
       [[0x0c00, 0x0c7f]],
-      ['Kohinoor Telugu', 'Telugu MN', 'Noto Sans Telugu', 'Arial Unicode MS'],
+      [
+        'Kohinoor Telugu',
+        'Telugu MN',
+        'Nirmala UI',
+        'Gautami',
+        'Noto Sans Telugu',
+        'Arial Unicode MS',
+      ],
     ],
     [
       [[0x0c80, 0x0cff]],
-      ['Kannada MN', 'Noto Sans Kannada', 'Arial Unicode MS'],
+      [
+        'Kannada MN',
+        'Nirmala UI',
+        'Tunga',
+        'Noto Sans Kannada',
+        'Arial Unicode MS',
+      ],
     ],
     [
       [[0x0d00, 0x0d7f]],
-      ['Malayalam MN', 'Noto Sans Malayalam', 'Arial Unicode MS'],
+      [
+        'Malayalam MN',
+        'Nirmala UI',
+        'Kartika',
+        'Noto Sans Malayalam',
+        'Arial Unicode MS',
+      ],
     ],
     [
       [[0x0e00, 0x0e7f]],
-      ['Thonburi', 'Sukhumvit Set', 'Noto Sans Thai', 'Arial Unicode MS'],
+      [
+        'Thonburi',
+        'Sukhumvit Set',
+        'Leelawadee UI',
+        'Tahoma',
+        'Noto Sans Thai',
+        'Arial Unicode MS',
+      ],
     ],
     [
       [
@@ -196,15 +246,59 @@ export function scriptFallbackFamilies(cps) {
       [
         'PingFang SC',
         'Hiragino Sans',
+        'Hiragino Sans GB',
+        'Songti SC',
+        'STHeiti',
         'Apple SD Gothic Neo',
+        'Microsoft YaHei',
+        'Yu Gothic',
+        'Meiryo',
+        'SimSun',
+        'MS Gothic',
+        'Malgun Gothic',
         'Noto Sans CJK SC',
+        'Noto Sans SC',
         'Arial Unicode MS',
       ],
     ],
     [
       [[0xac00, 0xd7af]],
-      ['Apple SD Gothic Neo', 'Noto Sans KR', 'Arial Unicode MS'],
+      [
+        'Apple SD Gothic Neo',
+        'AppleGothic',
+        'Malgun Gothic',
+        'Batang',
+        'Noto Sans KR',
+        'Noto Sans CJK KR',
+        'Arial Unicode MS',
+      ],
     ],
+    [
+      [[0x0b00, 0x0b7f]],
+      ['Oriya MN', 'Nirmala UI', 'Kalinga', 'Noto Sans Oriya'],
+    ],
+    [
+      [[0x0d80, 0x0dff]],
+      ['Sinhala MN', 'Nirmala UI', 'Iskoola Pota', 'Noto Sans Sinhala'],
+    ],
+    [
+      [[0x0e80, 0x0eff]],
+      ['Lao MN', 'Lao Sangam MN', 'Leelawadee UI', 'Noto Sans Lao'],
+    ],
+    [
+      [[0x1000, 0x109f]],
+      ['Myanmar MN', 'Myanmar Sangam MN', 'Myanmar Text', 'Noto Sans Myanmar'],
+    ],
+    [
+      [[0x1780, 0x17ff]],
+      ['Khmer MN', 'Khmer Sangam MN', 'Leelawadee UI', 'Noto Sans Khmer'],
+    ],
+    [
+      [[0x0530, 0x058f]],
+      ['Mshtakan', 'Sylfaen', 'Noto Sans Armenian', 'Arial Unicode MS'],
+    ],
+    [[[0x10a0, 0x10ff]], ['Noto Sans Georgian', 'Sylfaen', 'Arial Unicode MS']],
+    [[[0x1200, 0x137f]], ['Kefa', 'Nyala', 'Noto Sans Ethiopic']],
   ];
   const out = [];
   for (const cp of cps) {
@@ -236,13 +330,35 @@ export class PdfEngine {
 
   _makeProvider() {
     const M = this.M;
+    const norm = (s) =>
+      s
+        .toLowerCase()
+        .replace(/[^a-z0-9]+/g, '')
+        .replace(/(psmt|mt|ps)$/, '');
+    const normLookup = (fam, styleKey, want) => {
+      const target = norm(fam);
+      if (!target) return null;
+      let anyStyle = null;
+      for (const [k, b] of PdfEngine.localFonts) {
+        if (!b || !b.length) continue;
+        const bar = k.indexOf('|');
+        const kf = bar < 0 ? k : k.slice(0, bar);
+        if (norm(kf) !== target) continue;
+        if (want.length && !sfntCovers(b, want)) continue;
+        const ks = bar < 0 ? '' : k.slice(bar + 1);
+        if (ks === styleKey) return b;
+        if (!anyStyle) anyStyle = b;
+      }
+      return anyStyle;
+    };
     return M.addFunction(
       (ctx, familyPtr, bold, italic, cps, n, outData, outSize) => {
         let fam = M.UTF8ToString(familyPtr);
         fam = fam.replace(/ (serif|mono)$/, '');
         const want = [];
         for (let i = 0; i < n; i++) want.push(M.HEAPU32[(cps >> 2) + i]);
-        const sk = '|' + (bold ? 1 : 0) + (italic ? 1 : 0);
+        const styleKey = (bold ? 1 : 0) + '' + (italic ? 1 : 0);
+        const sk = '|' + styleKey;
         const names = [fam, ...scriptFallbackFamilies(want)];
         let bytes = null;
         for (const nm of names) {
@@ -255,6 +371,7 @@ export class PdfEngine {
           }
           if (bytes) break;
         }
+        if (!bytes) bytes = normLookup(fam, styleKey, want);
         if (!bytes || !bytes.length) return 0;
         const buf = M._ec_buffer_alloc(bytes.length);
         if (!buf) return 0;